/* ============================================================
   IGNOU AI — Consolidated Design System
   IGNOU Blue (#0066B2) + Warm Red (#E03E3E)
   Warm stone neutrals. Pure CSS3, no frameworks.
   ============================================================ */

/* ---------- Light tokens ---------- */
:root {
  --brand: #0066B2;
  --brand-hover: #005A9C;
  --brand-soft: rgba(0, 102, 178, 0.08);
  --accent: #E03E3E;
  --accent-soft: rgba(224, 62, 62, 0.08);
  --ok: #16A34A;
  --ok-bg: rgba(22, 163, 74, 0.1);
  --danger: #DC2626;
  --danger-bg: rgba(220, 38, 38, 0.08);
  --bg: #F5F5F4;
  --surface: #FFFFFF;
  --surface-alt: #FAFAF9;
  --border: #E7E5E4;
  --text: #1C1917;
  --text-2: #57534E;
  --text-3: #78716C;
  --shadow-sm: 0 1px 2px rgba(28,25,23,0.05);
  --shadow: 0 1px 3px rgba(28,25,23,0.08), 0 1px 2px rgba(28,25,23,0.04);
  --shadow-md: 0 4px 12px rgba(28,25,23,0.08);
  --shadow-lg: 0 12px 32px rgba(28,25,23,0.1);
  --shadow-focus: 0 0 0 3px rgba(0,102,178,0.2);
  --r-sm: 6px; --r: 10px; --r-lg: 14px; --r-full: 9999px;
  --fast: 0.15s ease; --base: 0.2s ease;
  --smooth: 0.35s cubic-bezier(0.16,1,0.3,1);
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
}

/* ---------- Dark tokens ---------- */
html[data-theme="dark"] {
  --brand: #3B9EE8; --brand-hover: #5CB3F0;
  --brand-soft: rgba(59,158,232,0.1);
  --accent: #F87171; --accent-soft: rgba(248,113,113,0.1);
  --ok: #4ADE80; --ok-bg: rgba(74,222,128,0.1);
  --danger: #F87171; --danger-bg: rgba(248,113,113,0.1);
  --bg: #0C0A09; --surface: #1C1917; --surface-alt: #292524;
  --border: #292524;
  --text: #FAFAF9; --text-2: #A8A29E; --text-3: #A8A29E;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow: 0 1px 3px rgba(0,0,0,0.4);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.5);
  --shadow-focus: 0 0 0 3px rgba(59,158,232,0.3);
}

/* ---------- Base ---------- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;color-scheme:light dark;-webkit-text-size-adjust:100%}
html[data-theme="dark"]{color-scheme:dark}
body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.6;-webkit-font-smoothing:antialiased;min-height:100vh;transition:background 0.2s ease,color 0.2s ease;overflow-x:hidden}
img{max-width:100%;display:block}
a{color:var(--brand);text-decoration:none;transition:color var(--fast)}
a:hover{color:var(--brand-hover)}
button{font-family:var(--font);cursor:pointer;border:none;background:none;color:inherit}
input,select,textarea{font-family:var(--font);font-size:1rem;color:var(--text)}
h1,h2,h3,h4{color:var(--text);line-height:1.2}

/* ---------- Utilities ---------- */
.container{width:min(1120px,92%);margin-inline:auto}
.container.narrow{max-width:700px}
.skip-link{position:absolute;top:-100%;left:0;background:var(--brand);color:#fff;padding:.6rem 1rem;font-weight:600;font-size:.875rem;z-index:999;border-radius:0 0 var(--r-sm) 0;transition:top var(--fast)}
.skip-link:focus{top:0}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.muted{color:var(--text-3)}
.no-scrollbar{-webkit-overflow-scrolling:touch;scrollbar-width:none;-ms-overflow-style:none}
.no-scrollbar::-webkit-scrollbar{display:none}
:focus-visible{outline:2px dashed var(--brand);outline-offset:3px}
:focus:not(:focus-visible){outline:none}

/* ---------- Card ---------- */
.card{background:var(--surface);border:1px solid var(--brand);border-radius:var(--r);box-shadow:var(--shadow-sm),0 0 0 1px rgba(0,102,178,.15);transition:box-shadow var(--base),border-color var(--base),background var(--base)}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-size:.875rem;font-weight:600;padding:.625rem 1.125rem;border-radius:var(--r-sm);transition:all var(--fast);white-space:nowrap;line-height:1.4}
.btn:active{transform:scale(.97)}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-hover);color:#fff;box-shadow:var(--shadow-md);transform:translateY(-1px)}

/* Hero solver button text cycling */
.hero-solver-btn{transition:opacity 0.3s ease, transform 0.3s ease;min-width:240px}
.btn-secondary{background:var(--surface);color:var(--text);border:1px solid var(--border)}
.btn-secondary:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-soft)}
.btn-ghost{background:transparent;color:var(--text-2);border:1px solid var(--border)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-soft)}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{filter:brightness(.92);color:#fff;box-shadow:var(--shadow-md)}
.btn-sm{padding:.4rem .8rem;font-size:.8125rem}
.btn-lg{padding:.75rem 1.5rem;font-size:.9375rem}
.btn-block{width:100%}

/* ---------- Ticker ---------- */
.ticker{background:var(--brand);color:#fff;overflow:hidden;padding:.5rem 1rem;font-size:.8125rem;font-weight:500}
.ticker-track{display:flex;gap:3rem;animation:marquee 35s linear infinite;white-space:nowrap;width:max-content}
.ticker-item{flex-shrink:0}
@keyframes marquee{from{transform:translateX(0)}to{transform:translateX(-33.333%)}}

/* ---------- Header ---------- */
.site-header{position:sticky;top:0;z-index:50;background:rgba(245,245,244,.82);backdrop-filter:blur(16px) saturate(1.2);-webkit-backdrop-filter:blur(16px) saturate(1.2);border-bottom:1px solid var(--border);transition:background var(--base),border-color var(--base)}
html[data-theme="dark"] .site-header{background:rgba(12,10,9,.82)}
.nav-wrap{padding-block:.55rem}
.nav-inner{display:flex;align-items:center;gap:1.25rem}

/* Brand */
.brand{display:flex;align-items:center;gap:.6rem;color:var(--text);flex-shrink:0}
.brand:hover{color:var(--text)}
.brand-logo{height:48px;width:auto;object-fit:contain}
.brand{position:relative;overflow:hidden}
.brand::after{content:'';position:absolute;top:-50%;left:-50%;width:40%;height:200%;background:linear-gradient(135deg,transparent 30%,rgba(255,255,255,.35) 45%,rgba(255,255,255,.5) 50%,rgba(255,255,255,.35) 55%,transparent 70%);transform:skewX(-25deg);animation:logoShine 2.5s ease-in-out infinite;pointer-events:none}
@keyframes logoShine{0%{left:-50%}100%{left:150%}}
html[data-theme="dark"] .brand-logo{filter:brightness(0) invert(1)}
.brand-logo-badge{width:34px;height:34px;border-radius:var(--r-sm);background:var(--brand);color:#fff;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.brand-logo-badge img{width:100%;height:100%;object-fit:contain}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text strong{font-size:1.0625rem;font-weight:800;letter-spacing:-.02em}
.brand-text small{color:var(--text-2);font-size:.625rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em}

/* Nav menu */
.nav-menu{display:flex;align-items:center;gap:.125rem;list-style:none;background:var(--surface-alt);padding:.2rem;border-radius:var(--r);border:1px solid var(--border)}
.nav-pill{display:inline-flex;align-items:center;gap:5px;padding:.625rem .75rem;border-radius:var(--r-sm);color:var(--text-2);font-size:.8125rem;font-weight:600;transition:all var(--fast);border:1px solid transparent;min-height:44px}
.nav-pill:hover{color:var(--text);background:var(--surface)}
.nav-pill.active{color:#fff;background:var(--brand);border-color:var(--brand)}
.nav-pill.active:hover{background:var(--brand-hover)}
.nav-pill-nowrap{white-space:nowrap}

/* AI badge */
.ai-badge{display:inline-flex;align-items:center;font-size:.5625rem;font-weight:700;padding:.1rem .35rem;border-radius:var(--r-full);background:var(--accent);color:#fff;letter-spacing:.04em;text-transform:uppercase;line-height:1;vertical-align:middle}

/* Nav actions */
.nav-actions{display:flex;align-items:center;gap:.75rem;margin-left:auto}
.icon-btn{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;border-radius:var(--r-sm);color:var(--text-2);transition:all var(--fast)}
.icon-btn:hover{background:var(--surface-alt);color:var(--brand)}

/* Header search bar */
.header-search{display:flex;align-items:center;gap:6px;padding:.5rem .75rem;border-radius:var(--r-full);background:var(--surface-alt);border:1px solid var(--border);cursor:pointer;transition:all var(--fast);min-width:140px;min-height:44px}
.header-search:hover{border-color:var(--brand);background:var(--brand-soft)}
.header-search svg{color:var(--text-3);flex-shrink:0}
.header-search-text{font-size:.75rem;color:var(--text-3);white-space:nowrap}

/* Theme toggle */
.theme-toggle .icon-moon{display:none}
html[data-theme="dark"] .theme-toggle .icon-sun{display:none}
html[data-theme="dark"] .theme-toggle .icon-moon{display:block}
#themeToggle *{pointer-events:none}

/* Auth zone */
.auth-zone{display:flex;align-items:center;gap:.35rem}
.student-chip{display:flex;align-items:center;justify-content:center;width:36px;height:36px;padding:0;border-radius:50%;background:var(--surface-alt);border:2px solid var(--brand);cursor:pointer;transition:all var(--fast);position:relative;flex-shrink:0}
.student-chip:hover{border-color:var(--brand);box-shadow:0 0 0 2px rgba(59,130,246,0.2)}
.student-avatar{width:32px;height:32px;border-radius:50%;background:var(--brand);color:#fff;display:flex;align-items:center;justify-content:center;font-size:.75rem;font-weight:700;overflow:hidden}
.student-chip img{border-radius:50%;object-fit:cover;display:block;width:32px;height:32px}
.student-info{display:flex;flex-direction:column;line-height:1.1}
.student-info strong{font-size:.75rem;font-weight:600}
.student-info small{font-size:.625rem;color:var(--text-3)}
.student-dropdown{position:absolute;top:calc(100% + 6px);right:0;min-width:180px;background:var(--surface);border:1px solid var(--border);border-radius:var(--r);box-shadow:var(--shadow-lg);padding:.35rem;z-index:60;animation:dropIn .15s ease}
.student-dropdown[hidden]{display:none}
@keyframes dropIn{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:translateY(0)}}
.dropdown-item{display:flex;align-items:center;gap:.5rem;padding:.5rem .6rem;border-radius:var(--r-sm);font-size:.8125rem;color:var(--text);transition:background var(--fast);width:100%;text-align:left}
.dropdown-item:hover{background:var(--brand-soft);color:var(--brand)}
.dropdown-divider{height:1px;background:var(--border);margin:.25rem 0}
.dropdown-item[data-action="admin"]{color:var(--brand);font-weight:600}
.nav-cta{margin-left:.2rem}

/* Hamburger */
.hamburger{display:none;flex-direction:column;gap:4px;padding:12px;border-radius:var(--r-sm);min-width:44px;min-height:44px;align-items:center;justify-content:center}
.hamburger:hover{background:var(--surface-alt)}
.hamburger span{display:block;width:20px;height:2px;background:var(--text);border-radius:2px;transition:transform var(--base),opacity var(--base)}
.hamburger[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.hamburger[aria-expanded="true"] span:nth-child(2){opacity:0}
.hamburger[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* Mobile drawer backdrop */
.drawer-backdrop{display:none;position:fixed;inset:0;background:rgba(0,0,0,.3);z-index:44}
.drawer-backdrop.active{display:block}

/* Mobile drawer */
.mobile-drawer{position:absolute;top:100%;left:0;right:0;background:rgba(245,245,244,.98);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid var(--border);box-shadow:var(--shadow-lg);z-index:45;animation:slideDown .2s ease;max-height:calc(100vh - 60px);overflow-y:auto}
html[data-theme="dark"] .mobile-drawer{background:rgba(12,10,9,.98)}
.mobile-drawer[hidden]{display:none}
@keyframes slideDown{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}
.drawer-inner{padding:.75rem 5%;display:flex;flex-direction:column;gap:.125rem}
.drawer-link{padding:.75rem;border-radius:var(--r-sm);color:var(--text);font-weight:500;font-size:.9375rem;transition:all var(--fast);min-height:44px;display:flex;align-items:center}
.drawer-link:hover{background:var(--brand-soft);color:var(--brand)}
.drawer-link:active{background:var(--brand-soft)}
.drawer-divider{height:1px;background:var(--border);margin:.35rem 0}
.drawer-action{text-align:left;font-size:.9375rem;color:var(--text-2)}
.drawer-cta{margin-top:.4rem;text-align:center}

/* ---------- Hero ---------- */
.hero-section{padding:4rem 0 3.5rem;position:relative;overflow:hidden}
.hero-section::before{content:'';position:absolute;inset:0;background:radial-gradient(700px 350px at 85% -5%,rgba(0,102,178,.06),transparent),radial-gradient(500px 250px at 15% 105%,rgba(224,62,62,.03),transparent);pointer-events:none}
html[data-theme="dark"] .hero-section::before{background:radial-gradient(700px 350px at 85% -5%,rgba(59,158,232,.07),transparent),radial-gradient(500px 250px at 15% 105%,rgba(248,113,113,.04),transparent)}
.hero-content{display:grid;grid-template-columns:1fr 1fr;gap:3rem;align-items:center;position:relative}
.hero-eyebrow{display:inline-flex;align-items:center;gap:.4rem;padding:.3rem .75rem;border-radius:var(--r-full);background:var(--surface);border:1px solid var(--brand);box-shadow:0 0 0 1px rgba(0,102,178,.15);font-size:.75rem;font-weight:600;color:var(--text-2);margin-bottom:1rem}

/* Hero Slider */
.hero-slider{position:relative;min-height:auto}
.hero-slide{opacity:0;position:absolute;top:0;left:0;right:0;transition:opacity 0.5s ease-in-out;pointer-events:none}
.hero-slide.active{opacity:1;position:relative;pointer-events:auto}
.hero-text h1{font-size:clamp(2rem,4.5vw,2.75rem);font-weight:800;letter-spacing:-.03em;line-height:1.1;margin-bottom:1rem}
.gradient-text{background:linear-gradient(90deg,var(--brand) 0%,var(--accent) 40%,var(--brand) 50%,#fff 50.5%,var(--brand) 51%,var(--accent) 60%,var(--brand) 100%);background-size:300% 100%;-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;background-position:100% 0;animation:gradient-shine 6s ease-in-out infinite}

@keyframes gradient-shine{
  0%,70%{background-position:100% 0}
  85%{background-position:-100% 0}
  100%{background-position:-100% 0}
}
.hero-description{color:var(--text-2);font-size:clamp(.9375rem,1.4vw,1.0625rem);line-height:1.65;margin-bottom:1.5rem;max-width:520px}
.hero-actions{display:flex;gap:.75rem;flex-wrap:wrap;margin-bottom:2rem}
.hero-actions .btn{transition:opacity .2s,transform .2s}
.hero-stats{display:flex;gap:2rem}
.hero-stats .stat{display:flex;flex-direction:column}
.hero-stats strong{font-size:1.25rem;font-weight:800;color:var(--brand)}
.hero-stats span{font-size:.75rem;color:var(--text-3);font-weight:500}

/* Live dot */
.dot{width:7px;height:7px;border-radius:50%;display:inline-block;flex-shrink:0}
.dot-live{background:var(--ok);animation:pulseDot 2s ease-in-out infinite}
@keyframes pulseDot{0%,100%{box-shadow:0 0 0 0 rgba(22,163,74,.5)}50%{box-shadow:0 0 0 5px rgba(22,163,74,0)}}

/* Hero card */
.hero-card{background:var(--surface);border:1px solid var(--brand);border-radius:var(--r-lg);padding:1.25rem;box-shadow:var(--shadow-md),0 0 0 1px rgba(0,102,178,.15)}
.launcher-tabs{display:flex;gap:.15rem;background:var(--surface-alt);padding:.2rem;border-radius:var(--r);margin-bottom:1rem}
.launcher-tab{flex:1;padding:.625rem .5rem;border-radius:var(--r-sm);font-size:.75rem;font-weight:600;color:var(--text-2);transition:all var(--fast);text-align:center;min-height:44px}
.launcher-tab:hover{color:var(--text)}
.launcher-tab.active{background:var(--brand);color:#fff}
.tab-pane{display:none;animation:fadeIn .2s ease}
.tab-pane.active{display:block}
@keyframes fadeIn{from{opacity:0;transform:translateY(3px)}to{opacity:1;transform:translateY(0)}}

/* Search box */
.search-box{display:flex;align-items:center;gap:.5rem;background:var(--bg);border:1px solid var(--border);border-radius:var(--r);padding:.55rem .75rem;margin-bottom:.75rem;transition:border-color var(--fast),box-shadow var(--fast)}
.search-box:focus-within{border-color:var(--brand);box-shadow:var(--shadow-focus)}
.search-box input{flex:1;border:none;outline:none;background:transparent;min-width:0;font-size:.875rem}
.field-icon{color:var(--text-3);flex-shrink:0}

/* Autocomplete */
.autocomplete{position:relative;display:flex;align-items:center;gap:.5rem;background:var(--bg);border:1px solid var(--border);border-radius:var(--r);padding:.55rem .75rem;margin-bottom:.75rem;transition:border-color var(--fast),box-shadow var(--fast)}
.autocomplete:focus-within{border-color:var(--brand);box-shadow:var(--shadow-focus)}
.autocomplete input{flex:1;border:none;outline:none;background:transparent;min-width:0}
.autocomplete-list{position:absolute;top:calc(100% + 4px);left:0;right:0;background:var(--surface);border:1px solid var(--border);border-radius:var(--r);box-shadow:var(--shadow-lg);max-height:200px;overflow-y:auto;z-index:10}
.autocomplete-item{padding:.5rem .75rem;font-size:.8125rem;cursor:pointer;transition:background var(--fast)}
.autocomplete-item:hover{background:var(--brand-soft)}

/* Chips */
.quick-filters,.chips-row{display:flex;flex-wrap:wrap;align-items:center;gap:.35rem;margin-bottom:.75rem}
.filter-label,.chips-label{font-size:.75rem;color:var(--text-3);margin-right:.15rem}
.chip{display:inline-flex;align-items:center;padding:.3rem .65rem;border-radius:var(--r-full);font-size:.75rem;font-weight:600;color:var(--brand);background:var(--brand-soft);border:1px solid transparent;transition:all var(--fast)}
.chip:hover{background:var(--brand);color:#fff;transform:translateY(-1px)}

/* Form elements */
.form-select,.form-input,.form-textarea,.field-select,.field-input,.field-textarea{width:100%;padding:.6rem .75rem;border:1px solid var(--border);border-radius:var(--r-sm);background:var(--bg);transition:border-color var(--fast),box-shadow var(--fast);font-size:.875rem}
.form-select:focus,.form-input:focus,.form-textarea:focus,.field-select:focus,.field-input:focus,.field-textarea:focus{outline:none;border-color:var(--brand);box-shadow:var(--shadow-focus)}
.form-textarea,.field-textarea{resize:vertical;min-height:80px;line-height:1.5}
.helper-text,.pane-note{font-size:.75rem;color:var(--text-3);margin:.5rem 0}
.field-label{display:block;font-size:.8125rem;font-weight:600;color:var(--text-2);margin-bottom:.35rem}

/* ---------- Page hero ---------- */
.page-hero{padding:2.5rem 0 2rem;text-align:center;background:var(--surface);border-bottom:1px solid var(--border)}
.page-hero h1{font-size:clamp(1.75rem,4vw,2.25rem);font-weight:800;letter-spacing:-.03em;margin-bottom:.4rem}
.page-hero p{color:var(--text-2);font-size:.9375rem;max-width:560px;margin:0 auto}

/* Eyebrow / section header */
.eyebrow{display:inline-block;font-size:.6875rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:var(--brand);margin-bottom:.3rem}
.section-header{text-align:center;margin-bottom:2.25rem}
.section-header h2{font-size:clamp(1.375rem,3vw,1.75rem);font-weight:800;letter-spacing:-.02em;margin-bottom:.35rem}
.section-header p{color:var(--text-2);font-size:.9375rem;max-width:520px;margin:0 auto}

/* Section block / head (old SPA) */
.section-block{padding:3.5rem 0}
.section-head{margin-bottom:2rem}
.section-head.left{text-align:left}
.section-head:not(.left){text-align:center}
.section-head h2{font-size:clamp(1.4rem,3vw,1.8rem);font-weight:700;letter-spacing:-.02em}
.section-head p{color:var(--text-2);margin-top:.4rem;font-size:.9375rem}

/* ---------- Features grid ---------- */
.features-section{padding:4rem 0}
.features-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1rem}
.feature-card{display:flex;flex-direction:column;gap:.75rem;padding:1.375rem;background:var(--surface);border:1px solid var(--brand);border-radius:var(--r);text-decoration:none;color:inherit;transition:all var(--base);box-shadow:0 0 0 1px rgba(0,102,178,.15)}
.feature-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:var(--border);color:inherit}
.feature-icon{width:44px;height:44px;border-radius:var(--r-sm);background:var(--brand-soft);color:var(--brand);display:flex;align-items:center;justify-content:center}
.feature-card h3{font-size:1rem;font-weight:700}
.feature-card p{font-size:.8125rem;color:var(--text-2);line-height:1.55}
.feature-link{font-size:.8125rem;font-weight:600;color:var(--brand);margin-top:auto;display:inline-flex;align-items:center;gap:.25rem;transition:gap var(--fast)}
.feature-link::after{content:'→';transition:transform var(--fast)}
.feature-card:hover .feature-link{gap:.5rem}
.feature-card:hover .feature-link::after{transform:translateX(4px)}
.feature-card-muted{opacity:.65}

/* Page head */
.page-head{text-align:center;padding:2.5rem 0 2rem;max-width:600px}
.page-head h1{font-size:clamp(1.5rem,3.5vw,2rem);font-weight:800;letter-spacing:-.03em;margin-bottom:.4rem}
.page-head p{color:var(--text-2);font-size:.9375rem}

/* Badge */
.badge{display:inline-block;font-size:.6875rem;font-weight:600;padding:.125rem .45rem;border-radius:var(--r-full);background:var(--brand-soft);color:var(--brand)}
.badge-brand{background:var(--brand);color:#fff}
.badge-soft{background:var(--surface-alt);color:var(--text-2)}

/* ---------- Solver ---------- */
.solver-section{padding:2rem 0 4rem}
.solver-grid,.solver-layout{display:grid;grid-template-columns:1fr 1fr;gap:1.25rem;align-items:start}
.solver-input-panel,.solver-output-panel,.solver-input,.solver-output{padding:1.375rem;overflow:hidden;min-width:0}
.solver-input-panel h2{font-size:1.0625rem;font-weight:700;margin-bottom:1rem;padding-bottom:.75rem;border-bottom:1px solid var(--border)}
.solver-form{display:flex;flex-direction:column;gap:.875rem}
.form-group,.solver-field{display:flex;flex-direction:column;gap:.3rem}
.form-group label,.solver-field label{font-size:.8125rem;font-weight:600;color:var(--text-2)}
.form-row,.solver-row{display:grid;grid-template-columns:1fr 1fr;gap:.75rem}
.form-range{-webkit-appearance:none;appearance:none;width:100%;height:5px;border-radius:var(--r-full);background:var(--surface-alt);outline:none;margin-top:.25rem}
.form-range::-webkit-slider-thumb{-webkit-appearance:none;width:18px;height:18px;border-radius:50%;background:var(--brand);cursor:pointer;box-shadow:0 1px 4px rgba(0,102,178,.3)}
.form-range::-moz-range-thumb{width:18px;height:18px;border-radius:50%;background:var(--brand);border:none;cursor:pointer}
.range-labels,.range-scale{display:flex;justify-content:space-between;font-size:.625rem;color:var(--text-3);margin-top:.2rem}
.form-error{color:var(--danger);font-size:.8125rem;min-height:1.1em}
.form-status{font-size:.8125rem;min-height:1.1em}
.form-status.err{color:var(--danger)}
.form-status.ok{color:var(--ok)}

/* Output panel */
.output-header,.solver-output-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:1rem;padding-bottom:.75rem;border-bottom:1px solid var(--border);flex-wrap:wrap;gap:.5rem}
.output-tabs,.solver-tabs{display:flex;gap:.15rem;background:var(--surface-alt);padding:.15rem;border-radius:var(--r-sm)}
.output-tab,.solver-tab{padding:.5rem .625rem;border-radius:4px;font-size:.75rem;font-weight:600;color:var(--text-2);transition:all var(--fast);min-height:44px}
.output-tab:hover,.solver-tab:hover{color:var(--text)}
.output-tab.active,.solver-tab.active{background:var(--brand);color:#fff}
.output-actions,.solver-actions{display:flex;gap:.25rem}
.output-content,.solver-canvas{min-height:280px}
.output-empty,.solver-empty{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:3rem 1rem;color:var(--text-3)}
.output-empty[hidden],.solver-empty[hidden]{display:none}
.output-empty svg,.solver-empty svg{margin-bottom:.75rem;opacity:.45}
.output-empty h3,.solver-empty h3{font-size:.9375rem;color:var(--text-2);margin-bottom:.25rem}
.output-loading,.solver-loading{display:flex;flex-direction:column;gap:.5rem;padding:1rem 0}
.output-loading[hidden],.solver-loading[hidden]{display:none}
.output-result{display:block}
.output-result[hidden]{display:none}
.loading-text,.loading-caption{font-size:.8125rem;color:var(--text-3);text-align:center;margin-top:.5rem}

/* Skeleton / shimmer */
.skeleton-line,.shimmer-block{height:12px;border-radius:5px;background:linear-gradient(90deg,var(--surface-alt) 25%,var(--border) 50%,var(--surface-alt) 75%);background-size:200% 100%;animation:shimmerLine 1.5s ease-in-out infinite}
.skeleton-line.w70,.shimmer-block.w70{width:70%}
.skeleton-line.w80{width:80%}
.skeleton-line.w90,.shimmer-block.w90{width:90%}
.skeleton-line.w100,.shimmer-block.w100{width:100%}
.shimmer-block.w40{width:40%}
@keyframes shimmerLine{0%{background-position:200% 0}100%{background-position:-200% 0}}

/* Result pane */
.result-meta{display:flex;flex-wrap:wrap;gap:.35rem;margin-bottom:.875rem}
.meta-tag{display:inline-block;padding:.15rem .5rem;background:var(--brand-soft);color:var(--brand);border-radius:var(--r-full);font-size:.6875rem;font-weight:600}
.meta-mode{display:inline-block;padding:.15rem .5rem;border-radius:var(--r-full);font-size:.6875rem;font-weight:600}
.meta-mode.live{background:#dcfce7;color:#166534}
.meta-mode.mock{background:#fef3c7;color:#92400e}
.result-pane,.answer-pane{padding:.35rem 0;overflow-wrap:break-word}
.stream-cursor{display:inline-block;width:2px;height:1em;background:var(--brand);margin-left:2px;vertical-align:text-bottom;animation:blink 0.8s infinite}
@keyframes blink{0%,50%{opacity:1}51%,100%{opacity:0}}
.result-pane h4,.answer-section h4{font-size:.9375rem;font-weight:700;color:var(--brand);margin-bottom:.35rem}
.result-pane p,.answer-section p{font-size:.8125rem;color:var(--text-2);line-height:1.65;margin-bottom:.875rem}
.result-pane ul,.answer-section ul{padding-left:1.125rem;margin-bottom:.875rem}
.result-pane li,.answer-section li{font-size:.8125rem;color:var(--text-2);margin-bottom:.25rem}
.answer-section{margin-bottom:1rem}

/* Difficulty / segmented */
.difficulty-selector,.segmented{display:flex;gap:.15rem;background:var(--surface-alt);padding:.15rem;border-radius:var(--r-sm)}
.diff-btn,.segmented button{flex:1;padding:.5rem;border-radius:4px;font-size:.75rem;font-weight:600;color:var(--text-2);transition:all var(--fast);min-height:44px}
.diff-btn:hover,.segmented button:hover{color:var(--text)}
.diff-btn.active,.segmented button.active{background:var(--brand);color:#fff}

/* File drop */
.file-drop{display:flex;align-items:center;gap:.5rem;padding:.6rem .75rem;border:2px dashed var(--border);border-radius:var(--r-sm);cursor:pointer;transition:all var(--fast);font-size:.8125rem;color:var(--text-2)}
.file-drop:hover{border-color:var(--brand);color:var(--brand)}

/* Shimmer button */
.shimmer-btn{position:relative;overflow:hidden}
.shimmer-btn::after{content:'';position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.18),transparent);animation:shimmerBtn 2.5s ease-in-out infinite}
@keyframes shimmerBtn{0%{left:-100%}100%{left:100%}}

/* ---------- Services grid ---------- */
.services-section{padding:2rem 0 4rem}
.services-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:.875rem}
.service-card{display:flex;gap:.875rem;padding:1.125rem;text-decoration:none;color:inherit;transition:all var(--base);align-items:flex-start}
.service-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:var(--brand);color:inherit}
.service-card:hover .service-icon{background:var(--brand);color:#fff}
.service-icon{width:40px;height:40px;border-radius:var(--r-sm);background:var(--brand-soft);color:var(--brand);display:flex;align-items:center;justify-content:center;flex-shrink:0;transition:all var(--base)}
.service-body{flex:1;min-width:0}
.service-body h3{font-size:.9375rem;font-weight:700;margin-bottom:.2rem}
.service-body p{font-size:.8125rem;color:var(--text-2);line-height:1.5}
.status-badge{display:inline-flex;align-items:center;gap:.25rem;font-size:.6875rem;font-weight:600;color:var(--ok);margin-bottom:.25rem}
.service-link{font-size:.8125rem;font-weight:600;color:var(--brand);display:inline-flex;align-items:center;gap:.25rem;transition:gap var(--fast);flex-shrink:0;align-self:center}
.service-card:hover .service-link{gap:.4rem}

/* ---------- Utility dashboard (services page) ---------- */
.utility-section{padding:2rem 0 4rem}
.utility-category{margin-bottom:2.5rem}
.utility-cat-title{display:flex;align-items:center;gap:.5rem;font-size:1rem;font-weight:700;color:var(--text);margin-bottom:1rem;padding-bottom:.5rem;border-bottom:1px solid var(--border)}
.utility-cat-title svg{color:var(--brand);flex-shrink:0}
.utility-grid{display:grid;grid-template-columns:1fr;gap:1rem}

/* Horizontal service card */
.service-hcard{display:flex;align-items:flex-start;gap:1rem;padding:1.25rem;text-decoration:none;color:inherit;transition:all var(--base);position:relative;border-color:var(--brand);box-shadow:0 0 0 1px rgba(0,102,178,.15)}
.service-hcard:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);border-color:var(--border);color:inherit}
.service-hcard:focus-visible{outline:2px dashed var(--brand);outline-offset:3px}

/* Icon */
.service-hcard-icon{width:40px;height:40px;border-radius:var(--r);background:var(--brand-soft);color:var(--brand);display:flex;align-items:center;justify-content:center;flex-shrink:0;transition:all var(--base)}
.service-hcard:hover .service-hcard-icon{background:var(--brand);color:#fff}

/* Body */
.service-hcard-body{flex:1;min-width:0}
.service-hcard-badge{display:inline-flex;align-items:center;gap:.35rem;font-size:.6875rem;font-weight:600;color:var(--ok);margin-bottom:.25rem}
.service-hcard-title{font-size:.9375rem;font-weight:700;color:var(--text);margin-top:.15rem;line-height:1.35}
.service-hcard-desc{font-size:.75rem;color:var(--text-2);line-height:1.55;margin-top:.25rem;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}

/* Action link */
.service-hcard-link{font-size:.75rem;font-weight:600;color:var(--brand);display:flex;align-items:center;gap:.25rem;flex-shrink:0;white-space:nowrap;align-self:center;transition:gap var(--fast)}
.service-hcard:hover .service-hcard-link{gap:.4rem}

@media(min-width:768px){
  .utility-grid{grid-template-columns:repeat(2,1fr);gap:1.25rem}
}
@media(min-width:1024px){
  .utility-grid{grid-template-columns:repeat(3,1fr);gap:1.5rem}
}

/* ---------- Table / Assignments ---------- */
.assignments-section{padding:2rem 0 4rem}
.table-toolbar{padding:.875rem;margin-bottom:.875rem}
.toolbar-row,.table-toolbar-row{display:flex;gap:.5rem;flex-wrap:wrap;align-items:center}
.toolbar-row.between,.table-toolbar-row.between{justify-content:space-between;margin-top:.5rem}
.table-search-box{display:flex;align-items:center;gap:.5rem;flex:1;min-width:200px;background:var(--bg);border:1px solid var(--border);border-radius:var(--r-sm);padding:.45rem .65rem;transition:border-color var(--fast)}
.table-search-box:focus-within{border-color:var(--brand)}
.table-search-box input{flex:1;border:none;outline:none;background:transparent;min-width:0;font-size:.875rem}
.table-select{width:auto;min-width:130px;padding:.45rem .65rem;border:1px solid var(--border);border-radius:var(--r-sm);background:var(--bg);font-size:.8125rem}
.medium-pills{display:flex;gap:.25rem}
.pill{padding:.5rem .75rem;border-radius:var(--r-full);font-size:.75rem;font-weight:600;color:var(--brand);background:var(--brand-soft);border:1px solid transparent;transition:all var(--fast);min-height:44px;display:inline-flex;align-items:center}
.pill:hover{background:var(--brand);color:#fff;transform:translateY(-1px)}
.pill.active{background:var(--brand);color:#fff;border-color:var(--brand)}
.table-count{font-size:.8125rem;color:var(--text-3);font-weight:500}
.table-wrap{overflow-x:auto;margin-bottom:.875rem}
.assignments-table{width:100%;border-collapse:collapse;min-width:700px}
.assignments-table th{background:var(--surface-alt);color:var(--text-2);text-align:center;font-size:.6875rem;text-transform:uppercase;letter-spacing:.04em;font-weight:700;padding:.65rem .8rem;border-bottom:1px solid var(--border);position:sticky;top:0}
.assignments-table td{padding:.6rem .8rem;border-top:1px solid var(--border);font-size:.8125rem;vertical-align:middle;text-align:center}
.assignments-table tbody tr{transition:background var(--fast)}
.assignments-table tbody tr:hover{background:var(--brand-soft)}
.th-action{text-align:center}
.dl-btn{display:inline-flex;align-items:center;gap:4px;font-size:.75rem;font-weight:600;padding:.5rem .75rem;border-radius:var(--r-sm);border:1px solid var(--border);background:var(--surface);color:var(--text);transition:all var(--fast);min-height:44px}
.dl-btn:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-soft)}
.pagination{display:flex;flex-wrap:wrap;gap:.3rem;justify-content:center;padding:.875rem 0}
.page-btn{min-width:44px;height:44px;padding:0 .5rem;border:1px solid var(--border);background:var(--surface);color:var(--text);border-radius:var(--r-sm);font-size:.8125rem;font-weight:600;transition:all var(--fast)}
.page-btn:hover:not(:disabled){border-color:var(--brand);color:var(--brand)}
.page-btn.active{background:var(--brand);border-color:var(--brand);color:#fff}
.page-btn:disabled{opacity:.35;cursor:not-allowed}
.table-empty{text-align:center;color:var(--text-3);padding:2rem 1rem;font-size:.875rem}
.table-empty[hidden]{display:none}
.skeleton-row td{padding:.875rem}

/* ---------- Groups grid ---------- */
.groups-section{padding:2rem 0 4rem}
.groups-toolbar{display:flex;align-items:center;gap:.875rem;margin-bottom:1rem}
.groups-toolbar .search-box,.groups-toolbar .table-search-box{flex:1}
.groups-tabs{display:flex;flex-wrap:nowrap;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none;gap:.35rem;margin-bottom:1.25rem;padding-bottom:.25rem}
.groups-tabs::-webkit-scrollbar{display:none}
.groups-tabs .pill{cursor:pointer;flex-shrink:0;border-color:var(--brand);border-width:1.5px}
.groups-toolbar .table-search-box{flex:1;border-color:var(--brand);border-width:1.5px}
.group-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:.875rem}
.group-card{padding:1.125rem;display:flex;flex-direction:column;gap:.5rem;transition:all var(--base);border-color:var(--brand);box-shadow:0 0 0 1px rgba(0,102,178,.15)}
.group-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:var(--border)}
.group-card.card-in-view{border-color:var(--brand);box-shadow:0 0 0 2px var(--brand),0 0 20px rgba(0,102,178,.15);transform:translateY(-2px)}
.group-card-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:.25rem;gap:.5rem}
.group-code{display:inline-block;font-size:.75rem;font-weight:700;color:var(--brand);background:var(--brand-soft);padding:.15rem .5rem;border-radius:var(--r-full);align-self:flex-start}
.group-title{font-size:.9375rem;font-weight:700;line-height:1.3}
.group-desc{font-size:.8125rem;color:var(--text-2);line-height:1.5}
.group-card-footer{display:flex;align-items:center;justify-content:space-between;margin-top:auto;padding-top:.5rem;border-top:1px solid var(--border)}
.group-price{font-size:.9375rem;font-weight:800;color:var(--brand)}
.group-meta{display:flex;align-items:center;gap:.3rem;font-size:.75rem;color:var(--text-3)}
.group-peer-count{color:var(--ok);font-weight:600;font-size:.75rem;display:inline-flex;align-items:center;gap:.2rem}

/* Category badges */
.group-cat-badge{font-size:.625rem;font-weight:700;padding:.15rem .45rem;border-radius:var(--r-full);text-transform:uppercase;letter-spacing:.04em}
.cat-masters{background:rgba(0,102,178,.1);color:var(--brand)}
.cat-bachelors{background:rgba(22,163,74,.1);color:var(--ok)}
.cat-pg{background:rgba(224,62,62,.08);color:var(--accent)}
.cat-diploma{background:rgba(217,119,6,.1);color:#D97706}
.cat-certificate{background:rgba(124,58,237,.08);color:#7C3AED}
.cat-other{background:var(--surface-alt);color:var(--text-2)}

/* Empty state */
.groups-empty{text-align:center;padding:3rem 1rem;color:var(--text-3)}
.groups-empty svg{margin-bottom:.75rem;opacity:.4}
.groups-empty h3{font-size:1rem;color:var(--text-2);margin-bottom:.25rem}
.groups-empty p{font-size:.8125rem}

/* ---------- Calculator ---------- */
.calculator-section{padding:2rem 0 4rem;overflow:hidden}
.calculator-grid,.calculator-layout{display:grid;grid-template-columns:1fr 280px;gap:1.25rem;align-items:start}
.calculator{padding:1.375rem;overflow:hidden;min-width:0}
.calc-inputs{display:flex;flex-direction:column;gap:1rem;margin-bottom:1.25rem}
.range-cell{display:flex;align-items:center;gap:.75rem}
.range-cell input[type="range"]{flex:1;-webkit-appearance:none;appearance:none;height:5px;border-radius:var(--r-full);background:var(--surface-alt);outline:none}
.range-cell input[type="range"]::-webkit-slider-thumb{-webkit-appearance:none;width:18px;height:18px;border-radius:50%;background:var(--brand);cursor:pointer;box-shadow:0 1px 4px rgba(0,102,178,.3)}
.range-cell input[type="range"]::-moz-range-thumb{width:18px;height:18px;border-radius:50%;background:var(--brand);border:none;cursor:pointer}
.range-cell output{min-width:34px;text-align:center;font-weight:700;font-size:.9375rem;color:var(--brand)}
.calc-result{background:var(--surface-alt);border-radius:var(--r);padding:1rem;text-align:center}
.calc-score{display:flex;align-items:baseline;justify-content:center;gap:.25rem;margin-bottom:.35rem}
.calc-score strong{font-size:2.25rem;font-weight:800;color:var(--brand);line-height:1}
.calc-score span{font-size:.8125rem;color:var(--text-3)}
.calc-grade{font-size:1.0625rem;font-weight:700;margin-bottom:.5rem}
.progress-track{height:6px;background:var(--bg);border-radius:var(--r-full);overflow:hidden;margin-bottom:.4rem}
.progress-fill{height:100%;background:linear-gradient(90deg,var(--brand),var(--accent));border-radius:var(--r-full);transition:width .4s cubic-bezier(.16,1,.3,1)}
.calc-verdict{font-size:.8125rem;color:var(--text-2);margin-bottom:.75rem}
.grade-guide{padding:1.25rem}
.grade-guide h3{font-size:.9375rem;margin-bottom:.875rem}
.grade-list{list-style:none;display:flex;flex-direction:column;gap:.4rem}
.grade-list li{display:flex;align-items:center;gap:.4rem;font-size:.8125rem;color:var(--text-2)}
.grade-pill{display:inline-flex;align-items:center;justify-content:center;width:24px;height:24px;border-radius:5px;font-size:.75rem;font-weight:700;color:#fff}
.grade-a{background:#16A34A}
.grade-b{background:var(--brand)}
.grade-c{background:#D97706}
.grade-d{background:#EA580C}
.grade-e{background:#DC2626}

/* Calculator Table */
.calc-table-title{font-size:1.25rem;font-weight:700;margin-bottom:1.25rem;text-align:center}
.calc-table-title .highlight{color:var(--brand)}
.calc-table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch}
.calc-table{width:100%;border-collapse:collapse;margin-bottom:1.5rem}
.calc-table th,.calc-table td{border:1px solid var(--border);padding:.625rem .5rem;text-align:center;font-size:.875rem;white-space:nowrap}
.calc-table th{background:var(--surface-alt);font-weight:600;color:var(--text-2)}
.calc-table input[type="number"]{width:80px;box-sizing:border-box;text-align:center;padding:.4rem;border:1px solid var(--border);border-radius:var(--r-sm);background:var(--surface);color:var(--text);font-size:.875rem;transition:border-color var(--fast)}
.calc-table input[type="number"]:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 2px rgba(0,102,178,.15)}
.calc-table tfoot td{font-weight:700;background:var(--surface-alt)}
.calc-table tfoot .bold td{font-weight:800}
.calc-result-table{width:100%;border-collapse:collapse;margin-bottom:1rem}
.calc-result-table th,.calc-result-table td{border:1px solid var(--border);padding:.5rem;text-align:center;font-size:.8125rem}
.calc-result-table th{background:var(--surface-alt);font-weight:600;color:var(--text-2)}
.calc-result-table td{font-weight:700;font-size:.875rem;color:var(--brand)}
.calc-degree-selector{display:flex;align-items:center;gap:.75rem;margin-bottom:1rem;flex-wrap:wrap}
.calc-degree-selector label{font-weight:600;font-size:.875rem;color:var(--text-2)}
.calc-degree-selector select{padding:.5rem .75rem;border:1px solid var(--border);border-radius:var(--r-sm);background:var(--surface);color:var(--text);font-size:.875rem;cursor:pointer;min-width:200px}
.calc-degree-selector select:focus{outline:none;border-color:var(--brand)}
.calc-error{background:#FEE2E2;color:#DC2626;padding:.625rem .875rem;border-radius:var(--r-sm);margin-bottom:1rem;font-size:.875rem;font-weight:600;border:1px solid #FECACA}
html[data-theme="dark"] .calc-error{background:rgba(220,38,38,.15);color:#F87171;border-color:rgba(220,38,38,.3)}
.input-error{border-color:var(--danger)!important;box-shadow:0 0 0 2px var(--danger-bg)!important}
.result-pass{color:var(--ok)!important;font-weight:800}
.result-fail{color:var(--danger)!important;font-weight:800}
.calc-fail-reason{background:#FEF2F2;color:#DC2626;padding:.5rem .75rem;border-radius:var(--r-sm);margin-top:.75rem;font-size:.8125rem;font-weight:600;border:1px solid #FECACA;text-align:center}
html[data-theme="dark"] .calc-fail-reason{background:rgba(220,38,38,.15);color:#F87171;border-color:rgba(220,38,38,.3)}

@media(max-width:768px){
  .calc-table th,.calc-table td{font-size:.75rem;padding:.4rem .35rem}
  .calc-table input[type="number"]{width:60px;font-size:.75rem;padding:.3rem}
  .calculator-grid,.calculator-layout{grid-template-columns:1fr}
  .grade-guide{order:1}
}

@media(max-width:480px){
  .calc-table th,.calc-table td{font-size:.6875rem;padding:.3rem .2rem}
  .calc-table input[type="number"]{width:50px;font-size:.6875rem}
}

/* ---------- Testimonials ---------- */
.testimonials-section{padding:4rem 0;background:var(--surface)}
.carousel{position:relative;padding:0 3rem;overflow:hidden}
.carousel-track{display:flex;gap:.875rem;transition:transform .5s cubic-bezier(.16,1,.3,1)}
.carousel-track > *{flex:0 0 calc(33.333% - .58rem)}
.testimonial-card,.testimonial-slide{display:flex;flex-direction:column;justify-content:space-between;min-height:0;padding:1.25rem;background:var(--surface-alt);border-radius:var(--r);border:1px solid var(--brand);box-shadow:0 0 0 1px rgba(0,102,178,.15)}
.testimonial-card blockquote,.testimonial-slide blockquote{flex:1;font-size:.9375rem;font-style:italic;color:var(--text);line-height:1.6;margin-bottom:0}
.testimonial-author,.testimonial-slide figcaption{display:flex;align-items:center;gap:.5rem}
.avatar{width:34px;height:34px;border-radius:50%;background:var(--brand);color:#fff;display:flex;align-items:center;justify-content:center;font-size:.6875rem;font-weight:700;flex-shrink:0}
.testimonial-author strong,.testimonial-slide figcaption strong{display:block;font-size:.8125rem}
.testimonial-author span,.testimonial-slide figcaption small{font-size:.6875rem;color:var(--text-2)}
.carousel-btn,.carousel-arrow{position:absolute;top:50%;transform:translateY(-50%);width:40px;height:40px;border-radius:50%;background:var(--surface);border:1px solid var(--border);display:flex;align-items:center;justify-content:center;z-index:5;transition:all var(--fast);box-shadow:var(--shadow-sm)}
.carousel-btn:hover,.carousel-arrow:hover{background:var(--brand);color:#fff;border-color:var(--brand)}
.carousel-btn.prev,.carousel-arrow.prev{left:0}
.carousel-btn.next,.carousel-arrow.next{right:0}
.carousel-dots{display:none}
.carousel-dot{width:12px;height:12px;border-radius:50%;background:var(--border);border:none;transition:all var(--fast);cursor:pointer;padding:0;min-width:44px;min-height:44px;display:inline-flex;align-items:center;justify-content:center;position:relative}
.carousel-dot::after{content:"";position:absolute;width:12px;height:12px;border-radius:50%;background:inherit;transition:all var(--fast)}
.carousel-dot.active::after{width:22px;background:var(--brand)}
.carousel-dot.active{background:transparent}

/* ---------- FAQ ---------- */
.faq-section{padding:4rem 0}
.faq-list{max-width:700px;margin:0 auto;padding:.5rem;border-radius:var(--r-lg)}
.faq-item{border-bottom:1px solid var(--border)}
.faq-item:last-child{border-bottom:none}
.faq-question,.faq-q{display:flex;align-items:center;justify-content:space-between;width:100%;padding:.875rem;font-size:.9375rem;font-weight:600;color:var(--text);text-align:left;transition:color var(--fast)}
.faq-question:hover,.faq-q:hover{color:var(--brand)}
.faq-question svg,.faq-q svg{flex-shrink:0;transition:transform var(--base)}
.faq-question[aria-expanded="true"] svg,.faq-q[aria-expanded="true"] svg{transform:rotate(180deg)}
.faq-answer,.faq-a{max-height:0;overflow:hidden;transition:max-height .35s cubic-bezier(.16,1,.3,1)}
.faq-answer p,.faq-a-inner p{padding:0 0 .875rem;font-size:.8125rem;color:var(--text-2);line-height:1.65}

/* ---------- Modals ---------- */
.modal-backdrop{position:fixed;inset:0;background:rgba(0,0,0,.45);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);display:flex;align-items:center;justify-content:center;padding:1rem;z-index:100;animation:fadeIn .15s ease}
.modal-backdrop[hidden]{display:none}
.modal{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-lg);box-shadow:var(--shadow-lg);width:min(420px,100%);padding:1.5rem;position:relative;animation:slideUp .25s cubic-bezier(.16,1,.3,1);max-height:90vh;overflow-y:auto}
@keyframes slideUp{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}
.modal-close{position:absolute;top:.4rem;right:.4rem;width:36px;height:36px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.125rem;color:var(--text-3);transition:all var(--fast);z-index:2}
.modal-close:hover{background:var(--surface-alt);color:var(--text)}
.modal h3{font-size:1.1rem;font-weight:700;margin-bottom:.15rem}
.modal .modal-sub{color:var(--text-3);font-size:.8125rem;margin-bottom:.875rem}
.auth-tabs{display:flex;gap:.15rem;background:var(--surface-alt);padding:.15rem;border-radius:var(--r-sm);margin-bottom:1rem;margin-top:.25rem}
.auth-tab{flex:1;padding:.5rem;border-radius:4px;font-size:.8125rem;font-weight:600;color:var(--text-2);transition:all var(--fast);min-height:44px}
.auth-tab.active{background:var(--brand);color:#fff}
.modal-form{display:flex;flex-direction:column;gap:.75rem}
.modal-form .form-field{display:flex;flex-direction:column;gap:.25rem}
.modal-form .form-field label{font-size:.75rem;font-weight:600;color:var(--text-2)}
.modal-form .form-field input{padding:.5rem .65rem;border:1px solid var(--border);border-radius:var(--r-sm);background:var(--bg);transition:border-color var(--fast);font-size:.875rem}
.modal-form .form-field input:focus{outline:none;border-color:var(--brand);box-shadow:var(--shadow-focus)}
.modal-form .form-field input::placeholder{color:var(--text-3)}
.checkbox-label{display:flex;align-items:center;gap:.4rem;font-size:.8125rem;color:var(--text-2);cursor:pointer}
.checkbox-label input[type="checkbox"]{width:15px;height:15px;accent-color:var(--brand)}
.modal-error{color:var(--danger);font-size:.8125rem;min-height:1.1em}
.modal-success{text-align:center;padding:.4rem 0}

/* Google login button */
.btn-google{display:flex;align-items:center;justify-content:center;gap:10px;width:100%;padding:.625rem 1rem;background:var(--surface);color:var(--text);border:1px solid var(--border);border-radius:var(--r-sm);font-size:.875rem;font-weight:600;transition:all var(--fast)}
.btn-google:hover{background:var(--surface-alt);border-color:var(--text-3);box-shadow:var(--shadow-sm)}
.auth-divider{display:flex;align-items:center;gap:.75rem;margin:.75rem 0}
.auth-divider::before,.auth-divider::after{content:"";flex:1;height:1px;background:var(--border)}
.auth-divider span{font-size:.75rem;color:var(--text-3);font-weight:500}
.success-icon{width:48px;height:48px;margin:0 auto .6rem;color:var(--ok)}
.modal-success h4{font-size:1.0625rem;margin-bottom:.25rem}
.modal-success p{color:var(--text-3);font-size:.8125rem;margin-bottom:.875rem}
.invite-box{background:var(--surface-alt);border:1px dashed var(--brand);color:var(--brand);border-radius:var(--r-sm);padding:.5rem;font-size:.8125rem;word-break:break-all;margin-bottom:.75rem}
.countdown{font-size:1.75rem;font-weight:800;color:var(--brand);text-align:center;margin:.4rem 0;font-variant-numeric:tabular-nums}
.countdown-label{font-size:.6875rem;color:var(--text-3);text-align:center;margin-bottom:.75rem}

/* ---------- Command palette ---------- */
.palette-backdrop{position:fixed;inset:0;background:rgba(0,0,0,.35);backdrop-filter:blur(5px);-webkit-backdrop-filter:blur(5px);display:flex;align-items:flex-start;justify-content:center;padding-top:14vh;z-index:110;animation:fadeIn .12s ease}
.palette-backdrop[hidden]{display:none}
.palette{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-lg);box-shadow:var(--shadow-lg);width:min(500px,94%);overflow:hidden;animation:slideUp .2s cubic-bezier(.16,1,.3,1)}
.palette-search{display:flex;align-items:center;gap:.5rem;padding:.75rem .875rem;border-bottom:1px solid var(--border)}
.palette-search input{flex:1;border:none;outline:none;background:transparent;font-size:.9375rem}
.palette-list{list-style:none;max-height:300px;overflow-y:auto;padding:.35rem}
.palette-item{display:flex;align-items:center;gap:.5rem;padding:.5rem .6rem;border-radius:var(--r-sm);cursor:pointer;transition:background var(--fast);font-size:.8125rem}
.palette-item:hover,.palette-item.active{background:var(--brand-soft)}
.palette-item-icon{width:26px;height:26px;border-radius:4px;background:var(--surface-alt);display:flex;align-items:center;justify-content:center;color:var(--text-3);flex-shrink:0;font-size:.875rem}
.palette-item-text{flex:1;min-width:0}
.palette-item-text strong{display:block;font-weight:600}
.palette-item-text small{display:block;font-size:.6875rem;color:var(--text-3);margin-top:1px}
.palette-badge{font-size:.625rem;font-weight:600;padding:2px 6px;border-radius:3px;background:var(--brand-soft);color:var(--brand);flex-shrink:0}
.palette-empty{justify-content:center;color:var(--text-3);font-size:.8125rem;padding:1rem;cursor:default}
.palette-empty:hover{background:transparent}
.palette-hint{padding:.4rem .875rem;font-size:.6875rem;color:var(--text-3);border-top:1px solid var(--border)}

/* ---------- Toast ---------- */
.toast-region{position:fixed;bottom:1.25rem;right:1.25rem;z-index:200;display:flex;flex-direction:column;gap:.4rem;pointer-events:none}
.toast{background:var(--surface);border:1px solid var(--border);border-radius:var(--r);box-shadow:var(--shadow-md);padding:.6rem .875rem;font-size:.8125rem;color:var(--text);pointer-events:auto;animation:toastIn .3s cubic-bezier(.16,1,.3,1);max-width:300px}
.toast.success{border-left:3px solid var(--ok)}
.toast.error{border-left:3px solid var(--danger)}
@keyframes toastIn{from{opacity:0;transform:translateX(16px)}to{opacity:1;transform:translateX(0)}}

/* ---------- Back to top ---------- */
.back-to-top{position:fixed;bottom:1.75rem;right:1.75rem;width:44px;height:44px;border-radius:50%;background:var(--brand);color:#fff;display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-md);z-index:50;transition:all var(--fast)}
.back-to-top:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}
.back-to-top[hidden]{display:none}

/* ---------- Footer ---------- */
.site-footer{background:var(--surface);border-top:1px solid var(--border);padding:2.5rem 0 1.25rem;margin-top:1.5rem}
.footer-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:1.5rem;margin-bottom:1.75rem}
.footer-blurb{color:var(--text-2);font-size:.8125rem;margin-top:.5rem;line-height:1.6}
.footer-badges{display:flex;gap:.4rem;margin-top:.65rem;flex-wrap:wrap}
.mini-badge{display:inline-flex;align-items:center;gap:.2rem;font-size:.625rem;font-weight:600;padding:.15rem .4rem;border-radius:var(--r-full);background:var(--surface-alt);border:1px solid var(--border);color:var(--text-2)}
.footer-col h4{font-size:.8125rem;font-weight:700;margin-bottom:.5rem;color:var(--text);text-align:left;white-space:nowrap}
.footer-col a,.footer-link-btn{display:block;font-size:.8125rem;color:var(--text-2);padding:.15rem 0;transition:color var(--fast);text-align:left;hyphens:none}
.footer-col a:hover,.footer-link-btn:hover{color:var(--brand)}
.footer-note{font-size:.75rem;color:var(--text-3);font-style:italic}
.disclaimer-box{background:var(--surface-alt);border:1px solid var(--border);border-radius:var(--r);padding:1rem;margin-bottom:.875rem}
.disclaimer-box strong{display:block;font-size:.8125rem;margin-bottom:.25rem;color:var(--text)}
.disclaimer-box p{font-size:.75rem;color:var(--text-3);line-height:1.65}
.disclaimer-toggle{display:none}
.copyright{text-align:center;font-size:.75rem;color:var(--text-2);font-weight:600}

/* ---------- Prose / disclaimer ---------- */
.disclaimer-section{padding:2rem 0 4rem}
.prose-card{padding:1.5rem}
.prose-card h3{font-size:.9375rem;font-weight:700;margin-bottom:.35rem;margin-top:1rem}
.prose-card h3:first-child{margin-top:0}
.prose-card p{font-size:.8125rem;color:var(--text-2);line-height:1.65}

/* ---------- Contact ---------- */
.contact-section{padding:2rem 0 4rem}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:1.5rem;align-items:start}
.contact-info{display:flex;flex-direction:column;gap:1rem}
.contact-card{display:flex;gap:.875rem;padding:1.25rem;align-items:flex-start;transition:all var(--base)}
.contact-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);border-color:var(--brand)}
.contact-icon{width:44px;height:44px;border-radius:var(--r);background:var(--brand-soft);color:var(--brand);display:flex;align-items:center;justify-content:center;flex-shrink:0}
.contact-card-body h3{font-size:.9375rem;font-weight:700;margin-bottom:.2rem}
.contact-card-body p{font-size:.8125rem;color:var(--text-2);line-height:1.5}
.contact-card-body a{font-weight:600}
.contact-form-card{padding:1.5rem}
.contact-form-card h2{font-size:1.0625rem;font-weight:700;margin-bottom:.25rem}
.contact-form-card>p{font-size:.8125rem;color:var(--text-2);margin-bottom:1.25rem}
.contact-form{display:flex;flex-direction:column;gap:.875rem}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:.875rem}
.form-field{display:flex;flex-direction:column;gap:.25rem}
.form-field label{font-size:.8125rem;font-weight:600;color:var(--text-2)}
.form-field input,.form-field textarea{padding:.6rem .75rem;border:1px solid var(--border);border-radius:var(--r-sm);background:var(--bg);transition:border-color var(--fast);font-size:.875rem}
.form-field input:focus,.form-field textarea:focus{outline:none;border-color:var(--brand);box-shadow:var(--shadow-focus)}
.form-field textarea{resize:vertical;min-height:100px;line-height:1.5}
.contact-faq{margin-top:2.5rem}
.contact-faq .section-header{margin-bottom:1.5rem}

@media(max-width:768px){
  .contact-grid{grid-template-columns:1fr}
  .form-row{grid-template-columns:1fr}
}

/* ---------- Legal pages (Privacy, Refund, Terms) ---------- */
.legal-section{padding:2rem 0 4rem}
.legal-layout{display:grid;grid-template-columns:220px 1fr;gap:2rem;align-items:start}
.legal-sidebar{position:sticky;top:80px}
.legal-toc{padding:1.125rem}
.legal-toc h3{font-size:.75rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em;color:var(--text-3);margin-bottom:.75rem}
.legal-toc-list{list-style:none;display:flex;flex-direction:column;gap:.15rem}
.legal-toc-list a{display:block;font-size:.8125rem;color:var(--text-2);padding:.4rem .6rem;border-radius:var(--r-sm);transition:all var(--fast);font-weight:500}
.legal-toc-list a:hover{color:var(--brand);background:var(--brand-soft)}
.legal-toc-list a.active{color:var(--brand);background:var(--brand-soft);font-weight:600}
.legal-content{min-width:0}
.legal-intro{padding:1.25rem;margin-bottom:1.5rem;background:var(--brand-soft);border:1px solid rgba(0,102,178,.12)}
.legal-intro p{font-size:.875rem;color:var(--text);line-height:1.65;margin:0}
.legal-card{padding:1.5rem;margin-bottom:1rem}
.legal-card h3{font-size:1rem;font-weight:700;color:var(--text);margin-bottom:.65rem;display:flex;align-items:center;gap:.5rem}
.legal-card h3 .legal-num{display:inline-flex;align-items:center;justify-content:center;width:26px;height:26px;border-radius:50%;background:var(--brand);color:#fff;font-size:.75rem;font-weight:700;flex-shrink:0}
.legal-card p{font-size:.8125rem;color:var(--text-2);line-height:1.65;margin-bottom:.75rem}
.legal-card p:last-child{margin-bottom:0}
.legal-card ul{padding-left:1.125rem;margin-bottom:.75rem}
.legal-card li{font-size:.8125rem;color:var(--text-2);margin-bottom:.35rem;line-height:1.55}
.legal-card a{font-weight:600}
.legal-highlight{background:var(--surface-alt);border-left:3px solid var(--brand);padding:.75rem 1rem;border-radius:0 var(--r-sm) var(--r-sm) 0;margin-bottom:.75rem}
.legal-highlight p{font-size:.8125rem;color:var(--text-2);margin:0}
.legal-contact-cta{text-align:center;padding:1.5rem;margin-top:1.5rem;background:var(--brand-soft);border:1px dashed var(--brand)}
.legal-contact-cta p{font-size:.875rem;color:var(--text-2);margin-bottom:.75rem}
.legal-contact-cta a{font-weight:700}

/* Refund specific */
.refund-cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:1rem;margin-bottom:1.5rem}
.refund-card{padding:1.25rem;text-align:center}
.refund-card-icon{width:48px;height:48px;border-radius:var(--r);background:var(--brand-soft);color:var(--brand);display:flex;align-items:center;justify-content:center;margin:0 auto .75rem}
.refund-card h3{font-size:.9375rem;font-weight:700;margin-bottom:.35rem}
.refund-card p{font-size:.8125rem;color:var(--text-2);line-height:1.55}
.refund-note{display:flex;gap:.75rem;align-items:flex-start;padding:1.125rem;background:var(--accent-soft);border:1px solid rgba(224,62,62,.15);border-radius:var(--r);margin-bottom:1.5rem}
.refund-note svg{flex-shrink:0;color:var(--accent);margin-top:.1rem}
.refund-note p{font-size:.8125rem;color:var(--text-2);line-height:1.6;margin:0}

@media(max-width:960px){
  .legal-layout{grid-template-columns:1fr}
  .legal-sidebar{position:static}
  .legal-toc{display:flex;flex-wrap:wrap;gap:.5rem;padding:.875rem}
  .legal-toc h3{width:100%;margin-bottom:.25rem}
  .legal-toc-list{flex-direction:row;flex-wrap:wrap;gap:.25rem}
  .legal-toc-list a{padding:.3rem .5rem;font-size:.75rem}
}
@media(max-width:480px){
  .refund-cards{grid-template-columns:1fr}
}

/* ---------- Noscript / section ---------- */
.noscript-note{padding:1.5rem 0;text-align:center;color:var(--text-2);font-size:.875rem}
.section{padding:3rem 0}

/* ---------- Route transitions ---------- */
.page-section,.route-only{animation:sectionEnter .3s cubic-bezier(.16,1,.3,1)}
@keyframes sectionEnter{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}
@keyframes shake{0%,100%{transform:translateX(0)}10%,30%,50%,70%,90%{transform:translateX(-3px)}20%,40%,60%,80%{transform:translateX(3px)}}
.shake{animation:shake .35s ease}

/* ---------- Reduced motion ---------- */
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}html{scroll-behavior:auto}.ticker-track{animation:none}}

/* ---------- Responsive ---------- */

/* 480px — small phones (360-430px Android) */
@media(max-width:480px){
  .container{width:min(100%,95%)}
  .page-hero{padding:1.75rem 0 1.5rem}
  .page-hero h1{font-size:1.375rem}
  .page-hero p{font-size:.8125rem}
  .hero-section{padding:2rem 0 1.75rem}
  .hero-text h1{font-size:1.5rem}
  .hero-description{font-size:.875rem}
  .hero-actions{flex-direction:column}
  .hero-actions .btn{width:100%;justify-content:center}
  .hero-stats{gap:1rem;flex-wrap:wrap;justify-content:center;text-align:center}
  .hero-stats .stat{align-items:center}
  .hero-stats strong{font-size:1.0625rem}
  .calc-table th,.calc-table td{font-size:.6875rem;padding:.3rem .2rem}
  .calc-table input[type="number"]{width:50px;font-size:.6875rem}
  .calc-degree-selector{flex-direction:column;align-items:stretch}
  .calc-degree-selector select{min-width:0;width:100%}
  .service-hcard{padding:1rem;gap:.75rem}
  .service-hcard-icon{width:36px;height:36px}
  .service-hcard-title{font-size:.875rem}
  .service-hcard-desc{font-size:.6875rem}
  .service-hcard-link{font-size:.6875rem}
  .footer-grid{grid-template-columns:1fr 1fr;gap:1.25rem}
  .footer-brand-col{grid-column:1/-1;display:flex;flex-direction:column;align-items:center}
  .footer-brand-col .brand{justify-content:center}
  .footer-badges{flex-wrap:nowrap;justify-content:center}
  .site-footer{background:var(--surface-alt);border-top:2px solid var(--border)}
  .footer-col a,.footer-link-btn{color:var(--text-3)}
  .footer-col{text-align:center}
  .footer-col h4,.footer-col a,.footer-link-btn{text-align:center}
  .footer-blurb{text-align:justify;padding:0 1.5rem}
  .disclaimer-box{text-align:center}
  .disclaimer-box p{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
  .disclaimer-box.expanded p{-webkit-line-clamp:unset;overflow:visible}
  .disclaimer-toggle{display:inline-block;background:none;border:none;color:var(--brand);font-size:.75rem;font-weight:600;cursor:pointer;padding:.25rem 0;margin-top:.15rem}
  .disclaimer-toggle:focus-visible{outline:2px dashed var(--brand);outline-offset:2px}
}

/* 620px — small tablets / large phones */
@media(max-width:620px){
  .launcher-tabs{flex-wrap:wrap}
  .launcher-tab{flex:1 1 auto;font-size:.6875rem;padding:.4rem .35rem}
  .form-row,.solver-row{grid-template-columns:1fr}
  .features-grid{grid-template-columns:1fr}
  .services-grid{grid-template-columns:1fr}
  .group-grid{grid-template-columns:1fr}
  .carousel-track > *{flex:0 0 100%}
  .carousel{padding:0}
  .carousel-btn,.carousel-arrow{display:none}
  .carousel-dots{display:none}
  .testimonial-card blockquote,.testimonial-slide blockquote{font-size:.8125rem;line-height:1.45}
  .assignments-table th,.assignments-table td{padding:.45rem;font-size:.75rem}
  .assignments-table .col-hide-sm{display:none}
  .assignments-table{min-width:0}
  .toolbar-row,.table-toolbar-row{flex-direction:column;align-items:stretch}
  .table-search-box{min-width:0}
  .modal{padding:1.125rem}
  .toast-region{right:.4rem;left:.4rem;bottom:calc(.875rem + env(safe-area-inset-bottom,0px))}
  .toast{max-width:100%}
}

/* 768px — tablet */
@media(max-width:768px){
  /* iOS Safari: prevent auto-zoom on input focus (16px minimum) */
  input,select,textarea,.form-input,.form-select,.form-textarea,.field-input,.field-select,.field-textarea,.modal-form input,.modal-form select,.calc-table input[type="number"]{font-size:max(1rem,16px)!important}
  .assignments-table .col-hide-md{display:none}
  .calc-table th,.calc-table td{font-size:.75rem;padding:.4rem .35rem}
  .calc-table input[type="number"]{width:60px;padding:.3rem}
  .calculator-grid,.calculator-layout{grid-template-columns:1fr}
  .grade-guide{order:1}
  .utility-grid{grid-template-columns:1fr;gap:.875rem}
}

/* 820px — mobile nav threshold */
@media(max-width:820px){
  .nav-inner{gap:.25rem}
  .nav-actions{gap:.2rem}
  .hamburger{display:flex;order:4;padding:8px}
  .nav-menu{display:none}
  .nav-actions .nav-cta{display:none}
  .nav-actions .auth-zone{display:flex;order:3}
  .nav-actions .auth-zone .btn{padding:.3rem .55rem;font-size:.6875rem;min-height:32px}
  .header-search{flex-shrink:1;min-width:0;max-width:auto;padding:.3rem;background:transparent;border-color:transparent;order:1}
  .header-search-text{display:none}
  .header-search svg{color:var(--text)}
  .icon-btn{padding:4px;order:2}
  .brand-logo{height:36px}
}

/* 960px — tablet landscape */
@media(max-width:960px){
  .hero-content{grid-template-columns:1fr;gap:2rem}
  .solver-grid,.solver-layout{grid-template-columns:1fr}
  .calculator-grid,.calculator-layout{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:repeat(3,1fr)}
  .carousel-track > *{flex:0 0 100%}
  .carousel{padding:0}
  .carousel-btn,.carousel-arrow{display:none}
}

/* Touch feedback for mobile */
@media(hover:none)and(pointer:coarse){
  .service-hcard:active{transform:scale(.99);background:var(--surface-alt)}
  .feature-card:active{transform:scale(.99);background:var(--surface-alt)}
  .group-card:active{transform:scale(.99);background:var(--surface-alt)}
  .btn:active{transform:scale(.97)}
  .nav-pill:active{background:var(--surface)}
  .drawer-link:active{background:var(--brand-soft)}
  .utility-card:active{transform:scale(.99);background:var(--surface-alt)}
}

/* Safe area insets for edge-to-edge screens */
@supports(padding:env(safe-area-inset-bottom)){
  .site-footer{padding-bottom:calc(1.25rem + env(safe-area-inset-bottom))}
  .mobile-drawer{padding-bottom:env(safe-area-inset-bottom)}
  .back-to-top{bottom:calc(1.75rem + env(safe-area-inset-bottom))}
}

/* ---------- Print ---------- */
@media print{
  .site-header,.ticker,.back-to-top,.toast-region,.modal-backdrop,.palette-backdrop{display:none!important}
  body{background:#fff;color:#000}
  .card{box-shadow:none;border:1px solid #ddd}
}