/* ============================================================
   StudyDesk — shared styles for public + auth + account pages.
   Matches the dashboard's dark, gold-accented aesthetic.
   ============================================================ */
:root{
  --bg:#0a0d12; --bg2:#11161d; --bg3:#171e28; --bg4:#1d2530;
  --border:#242d3a; --border2:#2f3a49;
  --text:#eef2f6; --text2:#94a3b3; --text3:#5b6675;
  --accent:#f0a500; --accent-rgb:240,165,0; --gold:#ffcf4d;
  --bg2-rgb:17,22,29;
  --green:#3fb950; --green-rgb:63,185,80;
  --red:#f85149; --red-rgb:248,81,73;
  --purple:#bc8cff; --purple-rgb:188,140,255;
  --blue:#58a6ff; --blue-rgb:88,166,255;
  --sans:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;
  --r-sm:9px; --r-md:14px; --r-lg:20px;
  --shadow:0 20px 60px rgba(0,0,0,.45);
  --maxw:1120px;
}
*{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{
  background:var(--bg); color:var(--text); font-family:var(--sans);
  line-height:1.6; min-height:100vh; -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none;}
img{max-width:100%;display:block;}
button,input,select,textarea{font-family:inherit;color:inherit;font-size:100%;}

/* ---------- layout helpers ---------- */
.container{max-width:var(--maxw);margin:0 auto;padding:0 22px;}
.section{padding:84px 0;}
.eyebrow{font-size:12px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);}
.muted{color:var(--text2);}
.center{text-align:center;}
.text-balance{text-wrap:balance;}

/* ---------- top navigation ---------- */
.nav{position:sticky;top:0;z-index:60;background:rgba(10,13,18,.72);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--border);}
.nav-inner{max-width:var(--maxw);margin:0 auto;padding:14px 22px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;}
.brand{display:flex;align-items:center;gap:11px;font-weight:800;font-size:17px;letter-spacing:-.01em;}
.brand-mark{width:36px;height:36px;border-radius:11px;
  background:transparent;overflow:hidden;
  display:flex;align-items:center;justify-content:center;flex-shrink:0;
  box-shadow:0 7px 22px rgba(16,150,255,.26),0 0 18px rgba(146,64,255,.14);}
.brand-mark img{width:100%;height:100%;object-fit:cover;border-radius:inherit;display:block;}
.nav-links{display:flex;align-items:center;gap:8px;}
.nav-links a{padding:9px 14px;border-radius:var(--r-sm);font-size:14px;font-weight:600;color:var(--text2);transition:.15s;}
.nav-links a:hover{color:var(--text);background:var(--bg3);}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:var(--r-sm);font-size:14.5px;font-weight:700;
  cursor:pointer;transition:.16s;border:1px solid transparent;white-space:nowrap;}
.btn-primary{background:var(--accent);color:#1a1206;border-color:var(--accent);
  box-shadow:0 8px 22px rgba(var(--accent-rgb),.28);}
.btn-primary:hover{filter:brightness(1.07);transform:translateY(-1px);}
.btn-ghost{background:transparent;color:var(--text);border-color:var(--border2);}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent);}
.btn-danger{background:transparent;color:var(--text);border-color:var(--border2);}
.btn-danger:hover{border-color:var(--red);color:var(--red);}
.btn-block{width:100%;}
.btn:active{transform:scale(.98);}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;
  background:radial-gradient(1100px 520px at 72% -8%, rgba(var(--accent-rgb),.14), transparent 60%),
             radial-gradient(900px 480px at 8% 6%, rgba(var(--purple-rgb),.10), transparent 55%);}
.hero-inner{max-width:var(--maxw);margin:0 auto;padding:92px 22px 76px;text-align:center;}
.hero h1{font-size:clamp(34px,6vw,62px);line-height:1.05;font-weight:800;letter-spacing:-.02em;margin:18px auto 0;max-width:15ch;}
.hero h1 .hl{background:linear-gradient(120deg,var(--accent),var(--gold));-webkit-background-clip:text;background-clip:text;color:transparent;}
.hero p.lead{font-size:clamp(16px,2.2vw,20px);color:var(--text2);max-width:60ch;margin:22px auto 0;}
.hero-cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-top:34px;}
.hero-note{margin-top:18px;font-size:13px;color:var(--text3);}

/* ---------- cards / grids ---------- */
.grid{display:grid;gap:20px;}
.grid-2{grid-template-columns:repeat(2,1fr);}
.grid-3{grid-template-columns:repeat(3,1fr);}
.grid-4{grid-template-columns:repeat(4,1fr);}
.card{background:linear-gradient(180deg,var(--bg2),var(--bg));border:1px solid var(--border);
  border-radius:var(--r-md);padding:22px;transition:.18s;}
.card:hover{border-color:var(--border2);transform:translateY(-2px);box-shadow:var(--shadow);}
.feature .ic{width:42px;height:42px;border-radius:11px;background:rgba(var(--accent-rgb),.12);
  border:1px solid rgba(var(--accent-rgb),.28);display:flex;align-items:center;justify-content:center;
  font-size:20px;margin-bottom:14px;}
.feature h3{font-size:16px;margin-bottom:6px;}
.feature p{font-size:14px;color:var(--text2);}

.section-head{max-width:64ch;margin:0 auto 46px;text-align:center;}
.section-head h2{font-size:clamp(26px,4vw,40px);font-weight:800;letter-spacing:-.02em;margin-top:10px;}
.section-head p{color:var(--text2);margin-top:12px;font-size:16px;}

/* steps */
.steps{counter-reset:step;display:grid;gap:16px;}
.step{display:flex;gap:18px;align-items:flex-start;background:var(--bg2);border:1px solid var(--border);
  border-radius:var(--r-md);padding:20px 22px;}
.step .num{counter-increment:step;flex-shrink:0;width:38px;height:38px;border-radius:10px;
  background:rgba(var(--accent-rgb),.12);border:1px solid rgba(var(--accent-rgb),.3);
  color:var(--accent);font-weight:800;display:flex;align-items:center;justify-content:center;}
.step .num::before{content:counter(step);}
.step h3{font-size:16px;margin-bottom:3px;}
.step p{font-size:14px;color:var(--text2);}

/* audience chips */
.chips{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;}
.chip{padding:10px 18px;border:1px solid var(--border2);border-radius:999px;font-weight:600;font-size:14px;
  background:var(--bg2);color:var(--text);}

/* ---------- about ---------- */
.about-card{display:grid;grid-template-columns:auto 1fr;gap:32px;align-items:center;
  max-width:820px;margin:0 auto;padding:38px;
  background:linear-gradient(180deg,var(--bg2),var(--bg));
  border:1px solid var(--border);border-radius:var(--r-lg);}
.about-avatar{width:96px;height:96px;border-radius:22px;flex-shrink:0;
  background:linear-gradient(135deg,var(--accent),var(--gold));
  display:flex;align-items:center;justify-content:center;
  font-size:36px;font-weight:900;color:#1a1206;
  box-shadow:0 10px 26px rgba(var(--accent-rgb),.3);}
.about-body h3{font-size:20px;font-weight:800;letter-spacing:-.01em;}
.about-body .role{color:var(--accent);font-weight:700;font-size:13px;
  letter-spacing:.04em;text-transform:uppercase;margin-top:4px;}
.about-body p.desc{color:var(--text2);font-size:15px;margin-top:12px;max-width:56ch;}
.about-links{display:flex;gap:10px;margin-top:18px;flex-wrap:wrap;}
.about-links a{display:inline-flex;align-items:center;gap:8px;padding:9px 16px;
  border-radius:999px;border:1px solid var(--border2);font-weight:600;font-size:13.5px;
  color:var(--text);transition:.15s;}
.about-links a:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-1px);}
.about-links svg{width:16px;height:16px;flex-shrink:0;}

/* ---------- footer ---------- */
.footer{border-top:1px solid var(--border);padding:44px 0 28px;color:var(--text2);
  background:linear-gradient(180deg,transparent,rgba(var(--accent-rgb),.04));}
.footer-inner{max-width:var(--maxw);margin:0 auto;padding:0 22px;display:flex;
  flex-direction:column;gap:22px;}
.footer-top{display:flex;align-items:flex-start;justify-content:space-between;gap:20px;flex-wrap:wrap;}
.footer-tagline{font-size:13px;color:var(--text3);margin-top:8px;max-width:34ch;}
.footer-social{display:flex;align-items:center;gap:10px;}
.footer-social a{display:inline-flex;align-items:center;gap:9px;padding:10px 16px;
  border-radius:999px;background:var(--bg2);border:1px solid var(--border2);
  font-weight:700;font-size:13.5px;color:var(--text);transition:.15s;}
.footer-social a:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-1px);
  box-shadow:0 8px 18px rgba(var(--accent-rgb),.18);}
.footer-social svg{width:17px;height:17px;flex-shrink:0;}
.footer-bottom{border-top:1px solid var(--border);padding-top:18px;
  display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:13px;color:var(--text3);}
.footer-bottom .credit b{color:var(--text2);}
@media(max-width:640px){
  .about-card{grid-template-columns:1fr;text-align:center;padding:30px 24px;}
  .about-avatar{margin:0 auto;}
  .about-links{justify-content:center;}
  .footer-bottom{flex-direction:column;text-align:center;}
}



/* ---------- Android app download ---------- */
.app-download-card{
  max-width:920px;margin:34px auto 0;padding:26px 28px;
  display:flex;align-items:center;gap:24px;text-align:left;
  background:linear-gradient(135deg,rgba(var(--accent-rgb),.10),var(--bg2) 55%,rgba(var(--purple-rgb),.07));
  border:1px solid rgba(var(--accent-rgb),.28);border-radius:var(--r-lg);
  box-shadow:0 18px 50px rgba(0,0,0,.22);
}
.app-download-icon{width:78px;height:78px;flex:0 0 78px;border-radius:19px;overflow:hidden;
  border:1px solid var(--border2);box-shadow:0 10px 24px rgba(0,0,0,.25);}
.app-download-icon img{width:100%;height:100%;object-fit:cover;}
.app-download-copy{min-width:0;}
.app-download-copy h2{font-size:22px;line-height:1.2;margin-top:5px;letter-spacing:-.02em;}
.app-download-copy p{color:var(--text2);font-size:14px;margin-top:7px;max-width:62ch;}
.app-download-actions{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin-top:16px;}
.app-download-meta{font-size:12px;color:var(--text3);}
@media(max-width:640px){
  .app-download-card{flex-direction:column;text-align:center;padding:26px 20px;}
  .app-download-actions{justify-content:center;}
}

/* ---------- auth / form card ---------- */
.auth-wrap{min-height:100vh;width:100%;box-sizing:border-box;display:flex;
  align-items:center;justify-content:center;padding:32px 18px;overflow-x:hidden;
  background:radial-gradient(900px 500px at 50% -10%, rgba(var(--accent-rgb),.12), transparent 60%);}
.auth-card{width:100%;max-width:440px;background:var(--bg2);border:1px solid var(--border);
  border-radius:var(--r-lg);padding:34px 32px;box-shadow:var(--shadow);box-sizing:border-box;}
.auth-card.wide{max-width:600px;}
.auth-head{text-align:center;margin-bottom:24px;}
.auth-head .brand{justify-content:center;margin-bottom:14px;}
.auth-head h1{font-size:23px;letter-spacing:-.01em;}
.auth-head p{color:var(--text2);font-size:14px;margin-top:6px;}

.field{margin-bottom:16px;}
.field.row2{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-bottom:0;}
label{display:block;font-size:11px;font-weight:700;letter-spacing:.05em;text-transform:uppercase;
  color:var(--text3);margin-bottom:7px;}
input,select,textarea{width:100%;padding:12px 14px;background:var(--bg3);border:1px solid var(--border);
  border-radius:var(--r-sm);color:var(--text);outline:none;transition:.15s;font-size:14.5px;}
input:focus,select:focus,textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(var(--accent-rgb),.16);}
.hint{font-size:12px;color:var(--text3);margin-top:6px;line-height:1.5;}
.form-foot{margin-top:22px;}
.auth-alt{text-align:center;margin-top:20px;font-size:14px;color:var(--text2);}
.auth-alt a{color:var(--accent);font-weight:600;}
.inline-links{display:flex;justify-content:space-between;font-size:13px;margin-top:-6px;margin-bottom:16px;}
.inline-links a{color:var(--accent);}

/* ---------- in-card support / help panel (premium glass card) ----------
   Lives inside .auth-card, in normal document flow, directly below the
   last form element — never absolutely/fixed positioned, no negative
   margins on the component itself, no side placement. Built from three
   layers on one element (glass tint + solid base + gradient border, via
   background-clip: padding-box / border-box) plus an isolated, clipped
   ::before for the slow ambient glow — so the card simply grows to
   contain it like any other block. */
.support-help{
  position:relative;
  isolation:isolate;
  overflow:hidden;
  width:100%;
  max-width:100%;
  box-sizing:border-box;
  margin-top:18px;
  padding:clamp(16px,4vw,20px) clamp(14px,5vw,22px);
  border-radius:var(--r-md);
  border:1px solid transparent;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:5px;
  text-align:center;

  background:
    linear-gradient(180deg, rgba(255,255,255,.05), rgba(255,255,255,.015)) padding-box,
    linear-gradient(180deg, rgba(var(--bg2-rgb),.72), rgba(var(--bg2-rgb),.6)) padding-box,
    linear-gradient(135deg, rgba(var(--accent-rgb),.55), rgba(var(--accent-rgb),.08) 35%,
      transparent 55%, rgba(var(--accent-rgb),.4) 100%) border-box;

  backdrop-filter:blur(14px) saturate(1.15);
  -webkit-backdrop-filter:blur(14px) saturate(1.15);

  box-shadow:
    0 12px 28px rgba(0,0,0,.32),
    inset 0 1px 0 rgba(255,255,255,.06);

  transition:transform .3s cubic-bezier(.2,.8,.2,1), box-shadow .3s ease;
}
.support-help:hover{
  transform:translateY(-2px);
  box-shadow:
    0 18px 38px rgba(0,0,0,.38),
    inset 0 1px 0 rgba(255,255,255,.08),
    0 0 28px rgba(var(--accent-rgb),.14);
}
/* slow, subtle ambient glow — clipped to the rounded card by overflow:hidden */
.support-help::before{
  content:"";
  position:absolute;
  inset:-45%;
  z-index:0;
  background:radial-gradient(circle at 50% 18%, rgba(var(--accent-rgb),.16), transparent 60%);
  animation:sdSupportGlow 7s ease-in-out infinite;
  pointer-events:none;
}
@keyframes sdSupportGlow{
  0%,100%{opacity:.5;transform:scale(1);}
  50%{opacity:.85;transform:scale(1.05);}
}

.support-help-icon{
  position:relative;z-index:1;
  width:30px;height:30px;flex:0 0 30px;
  border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  font-size:13px;line-height:1;color:#241703;
  background:radial-gradient(circle at 30% 28%, #fff4b0, var(--gold) 45%, var(--accent) 100%);
  box-shadow:
    0 0 0 4px rgba(var(--accent-rgb),.10),
    0 0 16px rgba(var(--accent-rgb),.35),
    inset 0 1px 1px rgba(255,255,255,.4);
  transition:transform .35s cubic-bezier(.2,.8,.2,1), box-shadow .35s ease;
}
.support-help:hover .support-help-icon{
  transform:rotate(-8deg) scale(1.06);
  box-shadow:
    0 0 0 5px rgba(var(--accent-rgb),.14),
    0 0 22px rgba(var(--accent-rgb),.5),
    inset 0 1px 1px rgba(255,255,255,.5);
}

.support-help-label{
  position:relative;z-index:1;
  margin:2px 0 0;
  font-size:clamp(10.5px,2.8vw,11px);
  font-weight:700;
  letter-spacing:.09em;
  text-transform:uppercase;
  color:var(--text2);
  opacity:.9;
  max-width:100%;
}

.support-help-link{
  position:relative;z-index:1;
  display:inline-block;
  margin-top:2px;
  font-size:clamp(13px,3.6vw,14.5px);
  font-weight:700;
  max-width:100%;
  overflow-wrap:anywhere;
  word-break:break-word;
  background:linear-gradient(90deg, var(--gold), var(--accent) 45%, var(--gold));
  background-size:200% auto;
  background-position:0% 0;
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
  -webkit-text-fill-color:transparent;
  filter:drop-shadow(0 0 0 rgba(var(--accent-rgb),0));
  transition:background-position .4s ease, filter .3s ease;
}
.support-help-link::after{
  content:"";
  position:absolute;
  left:50%;bottom:-3px;
  width:0;height:1px;
  background:linear-gradient(90deg, transparent, var(--accent), transparent);
  transform:translateX(-50%);
  transition:width .35s ease;
}
.support-help:hover .support-help-link,
.support-help-link:focus-visible{
  background-position:100% 0;
  filter:drop-shadow(0 0 6px rgba(var(--accent-rgb),.4));
}
.support-help:hover .support-help-link::after,
.support-help-link:focus-visible::after{
  width:100%;
}
@media(prefers-reduced-motion:reduce){
  .support-help,
  .support-help::before,
  .support-help-icon,
  .support-help-link,
  .support-help-link::after{animation:none !important;transition:none !important;}
  .support-help:hover{transform:none;}
  .support-help:hover .support-help-icon{transform:none;}
}

/* alerts */
.alert{font-size:14px;padding:12px 15px;border-radius:var(--r-sm);margin-bottom:18px;line-height:1.5;}
.alert-error{background:rgba(var(--red-rgb),.1);border:1px solid rgba(var(--red-rgb),.3);color:#ff9d97;}
.alert-ok{background:rgba(var(--green-rgb),.1);border:1px solid rgba(var(--green-rgb),.3);color:#7ee495;}
.alert-info{background:rgba(var(--accent-rgb),.1);border:1px solid rgba(var(--accent-rgb),.3);color:var(--gold);}
.alert code{word-break:break-all;font-size:12.5px;background:rgba(0,0,0,.3);padding:2px 6px;border-radius:6px;}

/* account pages */
.page{max-width:760px;margin:0 auto;padding:32px 22px 60px;}
.page-top{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:6px;}
.page-top h1{font-size:24px;}
.back{color:var(--text2);font-size:14px;font-weight:600;}
.back:hover{color:var(--text);}
.acct-card{background:var(--bg2);border:1px solid var(--border);border-radius:var(--r-md);padding:22px;margin-bottom:18px;}
.acct-card h2{font-size:16px;margin-bottom:4px;}
.acct-card .sub{color:var(--text2);font-size:13.5px;margin-bottom:16px;}
.pill{font-size:11px;font-weight:700;letter-spacing:.04em;text-transform:uppercase;padding:3px 10px;border-radius:999px;}
.pill.on{color:var(--green);background:rgba(var(--green-rgb),.12);border:1px solid rgba(var(--green-rgb),.3);}
.pill.off{color:var(--text3);background:var(--bg3);border:1px solid var(--border);}

.attempt-row,.device-row{display:flex;align-items:center;gap:14px;padding:12px 0;border-bottom:1px solid var(--border);}
.attempt-row:last-child,.device-row:last-child{border-bottom:none;}
.attempt-row .ok{color:var(--green);} .attempt-row .fail{color:var(--red);}
.attempt-row span,.device-meta{font-size:13px;color:var(--text2);}
.device-info{flex:1;min-width:0;}
.device-name{font-weight:700;font-size:14.5px;display:flex;align-items:center;gap:8px;flex-wrap:wrap;}
.device-dot{width:10px;height:10px;border-radius:50%;background:var(--text3);flex-shrink:0;}
.device-dot.current{background:var(--green);box-shadow:0 0 0 3px rgba(var(--green-rgb),.18);}
.tag{font-size:10px;font-weight:700;letter-spacing:.05em;text-transform:uppercase;color:var(--green);
  background:rgba(var(--green-rgb),.12);border:1px solid rgba(var(--green-rgb),.3);padding:2px 8px;border-radius:999px;}

/* ---------- responsive ---------- */
@media(max-width:860px){
  .grid-4{grid-template-columns:repeat(2,1fr);}
  .grid-3{grid-template-columns:repeat(2,1fr);}
}
@media(max-width:640px){
  .nav-links a.hide-sm{display:none;}
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr;}
  .field.row2{grid-template-columns:1fr;gap:0;}
  .section{padding:60px 0;}
  .hero-inner{padding:64px 22px 54px;}
}

/* ============================================================
   Landing page v2 — premium interactive demo sections
   ============================================================ */

/* reveal-on-scroll */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .6s ease,transform .6s ease;}
.reveal.is-visible{opacity:1;transform:translateY(0);}
@media (prefers-reduced-motion: reduce){
  .reveal{opacity:1;transform:none;transition:none;}
  *{scroll-behavior:auto !important;}
}

/* hero badge */
.hero-badge{display:inline-flex;align-items:center;gap:7px;padding:7px 14px;border-radius:999px;
  background:rgba(var(--accent-rgb),.1);border:1px solid rgba(var(--accent-rgb),.3);
  color:var(--gold);font-size:12px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;}

/* ---------- live dashboard demo window ---------- */
.demo-shell{max-width:920px;margin:52px auto 0;}
.demo-window{position:relative;background:linear-gradient(180deg,rgba(23,30,40,.85),rgba(10,13,18,.92));
  border:1px solid var(--border2);border-radius:22px;padding:0;overflow:hidden;
  box-shadow:0 40px 100px rgba(0,0,0,.55),0 0 0 1px rgba(255,255,255,.02) inset;
  backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);}
.demo-window::before{content:'';position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(500px 220px at 15% -10%, rgba(var(--accent-rgb),.14), transparent 60%);}
.demo-topbar{display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:16px 22px;border-bottom:1px solid var(--border);flex-wrap:wrap;}
.demo-topbar .brand-mini{display:flex;align-items:center;gap:9px;font-weight:800;font-size:14px;letter-spacing:.02em;}
.demo-dot-row{display:flex;gap:6px;margin-right:4px;}
.demo-dot-row span{width:9px;height:9px;border-radius:50%;background:var(--border2);}
.demo-streak-pill{display:flex;align-items:center;gap:6px;font-size:12.5px;font-weight:700;
  padding:6px 12px;border-radius:999px;background:rgba(var(--accent-rgb),.12);
  border:1px solid rgba(var(--accent-rgb),.3);color:var(--gold);}
.demo-streak-pill .flame{filter:drop-shadow(0 0 6px rgba(240,165,0,.6));}

.demo-tabs{display:flex;gap:4px;padding:10px 18px 0;overflow-x:auto;border-bottom:1px solid var(--border);}
.demo-tab{flex-shrink:0;padding:10px 16px;font-size:13px;font-weight:700;color:var(--text2);
  border-radius:10px 10px 0 0;cursor:pointer;transition:.15s;border:1px solid transparent;border-bottom:none;}
.demo-tab:hover{color:var(--text);}
.demo-tab.active{color:var(--accent);background:var(--bg2);border-color:var(--border);}

.demo-body{padding:26px 24px 30px;}
.demo-pane{display:none;}
.demo-pane.active{display:block;}

.demo-greet{font-size:15px;color:var(--text2);margin-bottom:18px;}
.demo-progress-row{display:flex;align-items:center;gap:26px;flex-wrap:wrap;margin-bottom:22px;}
.ring-demo{position:relative;width:112px;height:112px;flex-shrink:0;}
.ring-demo svg{width:100%;height:100%;transform:rotate(-90deg);}
.ring-demo circle{fill:none;stroke-width:9;}
.ring-demo .track{stroke:var(--bg3);}
.ring-demo .fill{stroke:url(#sdGoldGrad);stroke-linecap:round;
  stroke-dasharray:314;stroke-dashoffset:314;transition:stroke-dashoffset 1.4s cubic-bezier(.2,.8,.2,1);}
.ring-demo .ring-label{position:absolute;inset:0;display:flex;flex-direction:column;
  align-items:center;justify-content:center;}
.ring-demo .ring-pct{font-size:20px;font-weight:800;}
.ring-demo .ring-sub{font-size:10.5px;color:var(--text3);text-transform:uppercase;letter-spacing:.05em;}
.demo-goal-text{flex:1;min-width:180px;}
.demo-goal-text .big{font-size:15px;font-weight:700;margin-bottom:6px;}
.demo-goal-text .timer-num{font-variant-numeric:tabular-nums;font-size:26px;font-weight:800;
  letter-spacing:-.01em;color:var(--gold);}
.demo-goal-text .timer-sub{font-size:12.5px;color:var(--text3);margin-top:2px;}

.demo-stat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-bottom:24px;}
.demo-stat{background:var(--bg2);border:1px solid var(--border);border-radius:12px;
  padding:14px 12px;text-align:center;}
.demo-stat .v{font-size:19px;font-weight:800;}
.demo-stat .l{font-size:10.5px;color:var(--text3);text-transform:uppercase;letter-spacing:.05em;margin-top:3px;}

.demo-section-label{font-size:11px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;
  color:var(--text3);margin-bottom:12px;}
.demo-bars{display:flex;align-items:flex-end;gap:10px;height:92px;}
.demo-bar-col{flex:1;display:flex;flex-direction:column;align-items:center;gap:8px;}
.demo-bar-track{width:100%;max-width:26px;height:70px;display:flex;align-items:flex-end;
  background:var(--bg3);border-radius:6px;overflow:hidden;}
.demo-bar-fill{width:100%;height:0%;border-radius:6px;
  background:linear-gradient(180deg,var(--gold),var(--accent));
  transition:height 1s cubic-bezier(.2,.8,.2,1);}
.demo-bar-col span{font-size:10.5px;color:var(--text3);font-weight:600;}

/* analytics pane */
.demo-kpi-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-bottom:20px;}
.demo-kpi{background:var(--bg2);border:1px solid var(--border);border-radius:12px;padding:14px;}
.demo-kpi .v{font-size:18px;font-weight:800;}
.demo-kpi .v.up{color:var(--green);}
.demo-kpi .l{font-size:10.5px;color:var(--text3);text-transform:uppercase;letter-spacing:.04em;margin-top:3px;}

/* planner pane */
.demo-plan-list{display:flex;flex-direction:column;gap:8px;}
.demo-plan-row{display:flex;align-items:center;gap:12px;padding:11px 13px;border-radius:10px;
  background:var(--bg2);border:1px solid var(--border);font-size:13.5px;}
.demo-plan-row .t{font-variant-numeric:tabular-nums;color:var(--text3);width:58px;flex-shrink:0;font-weight:600;}
.demo-plan-row .s{flex:1;font-weight:600;}
.demo-plan-row .chk{width:19px;height:19px;border-radius:6px;border:1.5px solid var(--border2);flex-shrink:0;
  display:flex;align-items:center;justify-content:center;font-size:12px;transition:.5s;}
.demo-plan-row.done .chk{background:var(--green);border-color:var(--green);color:#08240f;}
.demo-plan-row.done .s{color:var(--text3);text-decoration:line-through;}

/* achievements pane */
.demo-achv-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:12px;}
.demo-achv{background:var(--bg2);border:1px solid var(--border);border-radius:12px;
  padding:16px 12px;text-align:center;}
.demo-achv .em{font-size:24px;margin-bottom:8px;}
.demo-achv .n{font-size:12.5px;font-weight:700;}
.demo-achv.locked{opacity:.38;filter:grayscale(1);}

/* streak calendar */
.streak-hero{display:flex;align-items:center;gap:28px;flex-wrap:wrap;}
.streak-flame-big{font-size:44px;font-weight:900;display:flex;align-items:baseline;gap:10px;}
.streak-flame-big .n{font-size:52px;background:linear-gradient(120deg,var(--accent),var(--gold));
  -webkit-background-clip:text;background-clip:text;color:transparent;}
.streak-cal{display:grid;grid-template-columns:repeat(7,1fr);gap:6px;max-width:220px;}
.streak-cal span{width:100%;aspect-ratio:1;border-radius:6px;background:rgba(var(--accent-rgb),.16);
  border:1px solid rgba(var(--accent-rgb),.3);display:flex;align-items:center;justify-content:center;
  font-size:10px;color:var(--gold);}
.streak-cal span.off{background:var(--bg3);border-color:var(--border);color:var(--text3);}

/* 24h timeline */
.tl24{position:relative;height:46px;border-radius:10px;overflow:hidden;display:flex;
  border:1px solid var(--border);}
.tl24 i{display:block;height:100%;font-style:normal;}
.tl24-legend{display:flex;gap:14px;flex-wrap:wrap;margin-top:14px;font-size:12px;color:var(--text2);}
.tl24-legend span{display:inline-flex;align-items:center;gap:6px;}
.tl24-legend i{width:10px;height:10px;border-radius:3px;display:inline-block;}

/* feature mini visuals */
.feature-visual{margin-top:14px;border-radius:10px;background:var(--bg3);border:1px solid var(--border);
  padding:12px;min-height:54px;display:flex;align-items:center;}

/* command center composite */
.cc-title{font-size:clamp(30px,5vw,54px);font-weight:900;letter-spacing:-.02em;line-height:1;text-align:center;}
.cc-title .hl{background:linear-gradient(120deg,var(--accent),var(--gold));-webkit-background-clip:text;
  background-clip:text;color:transparent;}
.command-center{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:44px;}
.cc-card{background:linear-gradient(180deg,var(--bg2),var(--bg));border:1px solid var(--border);
  border-radius:16px;padding:18px;}
.cc-card.wide{grid-column:span 2;}
.cc-card .cc-h{font-size:10.5px;font-weight:700;color:var(--text3);text-transform:uppercase;
  letter-spacing:.06em;margin-bottom:10px;}
.cc-card .cc-v{font-size:22px;font-weight:800;}

/* countdown demo */
.countdown-grid{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;}
.countdown-cell{background:var(--bg2);border:1px solid var(--border);border-radius:14px;
  padding:18px 22px;text-align:center;min-width:88px;}
.countdown-cell .n{font-size:30px;font-weight:800;font-variant-numeric:tabular-nums;color:var(--gold);}
.countdown-cell .l{font-size:10.5px;color:var(--text3);text-transform:uppercase;letter-spacing:.06em;margin-top:4px;}

/* marquee words */
.pillars{display:flex;justify-content:center;gap:28px;flex-wrap:wrap;}
.pillar{font-size:clamp(18px,3vw,26px);font-weight:800;color:var(--text3);letter-spacing:.02em;
  transition:color .4s,transform .4s;}
.pillar.is-visible{color:var(--text);}
.pillar-arrow{color:var(--border2);font-size:18px;align-self:center;}

/* demo-only tag */
.demo-flag{display:inline-block;font-size:10.5px;font-weight:700;letter-spacing:.05em;text-transform:uppercase;
  color:var(--text3);background:var(--bg3);border:1px solid var(--border);padding:3px 9px;border-radius:999px;
  margin-bottom:10px;}

@media(max-width:860px){
  .demo-stat-grid{grid-template-columns:repeat(3,1fr);}
  .demo-kpi-grid{grid-template-columns:repeat(2,1fr);}
  .command-center{grid-template-columns:repeat(2,1fr);}
  .cc-card.wide{grid-column:span 2;}
}
@media(max-width:640px){
  .demo-topbar{padding:14px 16px;}
  .demo-body{padding:20px 16px 24px;}
  .demo-progress-row{gap:18px;}
  .demo-stat-grid{grid-template-columns:repeat(3,1fr);gap:8px;}
  .demo-stat .v{font-size:16px;}
  .demo-kpi-grid{grid-template-columns:repeat(2,1fr);}
  .command-center{grid-template-columns:1fr 1fr;}
  .cc-card.wide{grid-column:span 2;}
  .streak-hero{gap:18px;}
  .streak-flame-big .n{font-size:40px;}
  .countdown-cell{min-width:70px;padding:14px 12px;}
  .countdown-cell .n{font-size:24px;}
  .pillars{gap:16px;}
}

/* ============================================================
   Homepage v3 — JEE-focused upgrade (nav, hero extras, subjects,
   AI tutor preview, practice flow, value strip, footer columns)
   ============================================================ */

/* ---------- mobile nav toggle ---------- */
.nav-toggle{display:none;flex-direction:column;justify-content:center;gap:5px;
  width:38px;height:38px;border-radius:9px;border:1px solid var(--border2);
  background:var(--bg3);cursor:pointer;flex-shrink:0;}
.nav-toggle span{display:block;width:16px;height:2px;margin:0 auto;background:var(--text);
  border-radius:2px;transition:transform .2s ease,opacity .2s ease;}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

@media(max-width:780px){
  .nav-toggle{display:flex;}
  .nav-links{position:absolute;top:100%;left:0;right:0;flex-direction:column;align-items:stretch;
    gap:2px;background:var(--bg2);border-bottom:1px solid var(--border);padding:10px 16px 16px;
    max-height:0;overflow:hidden;opacity:0;pointer-events:none;
    transition:max-height .28s ease,opacity .2s ease;}
  .nav-links.is-open{max-height:420px;opacity:1;pointer-events:auto;
    box-shadow:0 20px 40px rgba(0,0,0,.4);}
  .nav-links a{padding:12px 10px;border-radius:10px;width:100%;}
  .nav-links a.hide-sm{display:block;}
  .nav-links .btn{width:100%;margin-top:6px;}
}
@media (prefers-reduced-motion: reduce){
  .nav-links{transition:none;}
}

/* ---------- value strip ---------- */
.value-strip{border-block:1px solid var(--border);background:var(--bg2);}
.value-strip .container{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;padding:20px 22px;}
.value-item{display:inline-flex;align-items:center;gap:9px;padding:10px 18px;border-radius:999px;
  background:var(--bg3);border:1px solid var(--border);font-size:13.5px;font-weight:700;color:var(--text2);}
.value-item .dot{width:7px;height:7px;border-radius:50%;background:var(--accent);flex-shrink:0;
  box-shadow:0 0 0 4px rgba(var(--accent-rgb),.14);}

/* ---------- floating badges around hero visual ---------- */
.hero-visual-wrap{position:relative;}
.float-badge{position:absolute;display:inline-flex;align-items:center;gap:7px;
  padding:9px 14px;border-radius:999px;background:var(--bg2);border:1px solid var(--border2);
  font-size:12.5px;font-weight:700;color:var(--text);box-shadow:0 14px 30px rgba(0,0,0,.4);
  animation:sdFloat 5s ease-in-out infinite;z-index:5;}
.float-badge.b1{top:6%;left:-2%;animation-delay:0s;}
.float-badge.b2{top:34%;right:-3%;animation-delay:1.1s;}
.float-badge.b3{bottom:8%;left:2%;animation-delay:2.2s;}
@keyframes sdFloat{0%,100%{transform:translateY(0);}50%{transform:translateY(-9px);}}
@media(max-width:860px){.float-badge{display:none;}}
@media (prefers-reduced-motion: reduce){.float-badge{animation:none;}}

/* ---------- subjects (PCM) ---------- */
.subject-card{position:relative;overflow:hidden;padding:26px 24px;}
.subject-card .subj-ic{width:48px;height:48px;border-radius:12px;display:flex;align-items:center;
  justify-content:center;font-size:22px;font-weight:800;margin-bottom:16px;}
.subject-card.math .subj-ic{background:rgba(var(--accent-rgb),.14);border:1px solid rgba(var(--accent-rgb),.32);color:var(--gold);}
.subject-card.physics .subj-ic{background:rgba(var(--purple-rgb),.14);border:1px solid rgba(var(--purple-rgb),.32);color:var(--purple);}
.subject-card.chem .subj-ic{background:rgba(var(--blue-rgb),.14);border:1px solid rgba(var(--blue-rgb),.32);color:var(--blue);}
.subject-card h3{font-size:19px;margin-bottom:8px;letter-spacing:-.01em;}
.subject-card p{color:var(--text2);font-size:14px;margin-bottom:18px;}
.subject-card .subj-link{display:inline-flex;align-items:center;gap:6px;font-weight:700;font-size:13.5px;
  color:var(--text);transition:.15s;}
.subject-card.math .subj-link{color:var(--gold);}
.subject-card.physics .subj-link{color:var(--purple);}
.subject-card.chem .subj-link{color:var(--blue);}
.subject-card .subj-link:hover{gap:10px;}

/* ---------- AI tutor chat preview ---------- */
.chat-preview{max-width:640px;margin:0 auto;padding:26px 24px;}
.chat-row{display:flex;gap:12px;margin-bottom:16px;}
.chat-row:last-of-type{margin-bottom:0;}
.chat-avatar{width:32px;height:32px;border-radius:9px;flex-shrink:0;display:flex;align-items:center;
  justify-content:center;font-size:15px;font-weight:800;}
.chat-row.student .chat-avatar{background:var(--bg3);border:1px solid var(--border2);color:var(--text2);}
.chat-row.tutor .chat-avatar{background:linear-gradient(135deg,var(--accent),var(--gold));color:#1a1206;}
.chat-bubble{background:var(--bg3);border:1px solid var(--border);border-radius:14px;padding:13px 16px;
  font-size:14.5px;color:var(--text);max-width:80%;line-height:1.55;}
.chat-row.tutor .chat-bubble{background:rgba(var(--accent-rgb),.08);border-color:rgba(var(--accent-rgb),.28);}
.chat-row .who{font-size:11px;font-weight:700;letter-spacing:.05em;text-transform:uppercase;
  color:var(--text3);margin-bottom:5px;}
.chip-row{display:flex;flex-wrap:wrap;gap:9px;margin-top:20px;padding-top:18px;border-top:1px solid var(--border);}
.chip-sm{padding:7px 14px;border-radius:999px;border:1px solid var(--border2);background:var(--bg3);
  font-size:12.5px;font-weight:600;color:var(--text2);}

/* ---------- practice flow ---------- */
.flow-row{display:flex;align-items:center;justify-content:center;gap:0;flex-wrap:wrap;margin-top:8px;}
.flow-step{display:flex;flex-direction:column;align-items:center;gap:10px;width:150px;text-align:center;}
.flow-step .fs-ic{width:52px;height:52px;border-radius:14px;background:var(--bg2);border:1px solid var(--border2);
  display:flex;align-items:center;justify-content:center;font-size:22px;}
.flow-step .fs-label{font-size:13.5px;font-weight:700;}
.flow-arrow{color:var(--border2);font-size:20px;padding:0 8px;flex-shrink:0;align-self:center;
  margin-top:-30px;}
@media(max-width:780px){
  .flow-row{flex-direction:column;gap:14px;}
  .flow-arrow{transform:rotate(90deg);margin-top:0;}
}

/* ---------- footer columns ---------- */
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px;}
.footer-col h4{font-size:12px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;
  color:var(--text3);margin-bottom:14px;}
.footer-col{display:flex;flex-direction:column;gap:10px;}
.footer-col a{font-size:14px;color:var(--text2);transition:.15s;word-break:break-word;}
.footer-col a:hover{color:var(--accent);}
@media(max-width:900px){
  .footer-grid{grid-template-columns:1fr 1fr;}
}
@media(max-width:560px){
  .footer-grid{grid-template-columns:1fr;gap:26px;}
}

/* =========================================================
   StudyDesk v8 premium landing hero
   ========================================================= */
.premium-hero{position:relative;overflow:hidden;padding:clamp(92px,10vw,128px) 24px 44px;background:#030817;color:#fff;border-bottom:1px solid rgba(84,143,255,.18)}
.premium-hero-bg{position:absolute;inset:0;pointer-events:none;background:
 radial-gradient(circle at 72% 42%,rgba(0,183,255,.17),transparent 26%),
 radial-gradient(circle at 88% 22%,rgba(120,43,255,.13),transparent 25%),
 radial-gradient(circle at 15% 10%,rgba(24,91,255,.08),transparent 24%),
 linear-gradient(180deg,#020614 0%,#06102b 100%)}
.premium-hero-bg:after{content:"";position:absolute;inset:0;opacity:.14;background-image:radial-gradient(circle at center,rgba(255,255,255,.55) 0 1px,transparent 1.5px);background-size:56px 56px;mask-image:linear-gradient(to bottom,transparent,#000 28%,#000 75%,transparent)}
.premium-hero-inner{position:relative;z-index:2;max-width:1240px;margin:0 auto;display:grid;grid-template-columns:minmax(0,1fr) minmax(460px,.95fr);gap:42px;align-items:center;min-height:570px}
.premium-hero-copy{padding:22px 0}
.premium-kicker{display:inline-flex;align-items:center;gap:8px;padding:8px 14px;border:1px solid rgba(56,178,255,.35);border-radius:999px;background:rgba(13,31,70,.65);color:#a7ddff;font-size:13px;font-weight:700;letter-spacing:.02em;box-shadow:inset 0 0 24px rgba(0,160,255,.05)}
.premium-hero h1{margin:22px 0 12px;font-size:clamp(46px,5.6vw,78px);line-height:1.02;letter-spacing:-.055em;font-weight:850;max-width:760px}.premium-hero h1 span{background:linear-gradient(90deg,#20b7ff 0%,#4f8dff 46%,#c84cff 100%);-webkit-background-clip:text;background-clip:text;color:transparent}
.premium-subline{margin:0 0 14px;font-size:18px;font-weight:700;letter-spacing:.02em;color:#f0f6ff}.premium-lead{max-width:690px;color:#aebbd4;font-size:17px;line-height:1.72;margin:0}
.premium-cta-row{display:flex;flex-wrap:wrap;gap:14px;margin:28px 0 20px}.premium-btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:50px;padding:0 22px;border-radius:14px;text-decoration:none;font-weight:800;font-size:15px;transition:.2s ease}.premium-btn.primary{color:#fff;background:linear-gradient(100deg,#6d3cff,#0db8ff);box-shadow:0 12px 42px rgba(43,119,255,.3)}.premium-btn.primary:hover{transform:translateY(-2px);box-shadow:0 16px 50px rgba(43,119,255,.4)}.premium-btn.secondary{border:1px solid rgba(122,156,255,.38);background:rgba(7,18,45,.75);color:#edf5ff}.premium-btn.secondary:hover{background:rgba(19,38,80,.85);transform:translateY(-2px)}
.premium-trust-row{display:flex;flex-wrap:wrap;gap:16px;color:#8094b8;font-size:12px;font-weight:650}.premium-trust-row span{display:inline-flex;align-items:center;gap:5px}
.premium-hero-art{position:relative;min-height:545px;isolation:isolate}.premium-logo-stage{position:absolute;left:50%;top:51%;transform:translate(-50%,-50%);width:min(420px,82%);aspect-ratio:1;display:grid;place-items:center}.premium-logo-glow{position:absolute;width:78%;height:78%;border-radius:50%;background:radial-gradient(circle,rgba(0,207,255,.38),rgba(88,44,255,.18) 38%,transparent 70%);filter:blur(28px)}.premium-hero-logo{position:relative;width:86%;height:86%;object-fit:contain;filter:drop-shadow(0 28px 55px rgba(0,151,255,.35));animation:premiumFloat 5s ease-in-out infinite}.premium-orbit{position:absolute;left:50%;top:53%;transform:translate(-50%,-50%) rotate(-8deg);border:1px solid rgba(50,182,255,.25);border-radius:50%;box-shadow:0 0 30px rgba(61,110,255,.08)}.orbit-one{width:86%;height:34%}.orbit-two{width:68%;height:27%;transform:translate(-50%,-50%) rotate(19deg);border-color:rgba(174,61,255,.22)}
.premium-chip{position:absolute;z-index:4;display:flex;align-items:center;gap:8px;padding:10px 13px;border:1px solid rgba(75,145,255,.34);border-radius:11px;background:rgba(8,20,48,.78);backdrop-filter:blur(16px);box-shadow:0 14px 38px rgba(1,8,29,.4);font-size:13px;color:#dbeaff;font-weight:700}.premium-chip span{white-space:nowrap}.chip-planner{left:0;top:22%}.chip-todo{left:4%;top:34%}.chip-analytics{left:0;top:46%}.chip-ai{left:7%;top:58%}
.premium-countdown-card{position:absolute;right:0;top:14%;z-index:4;width:230px;padding:14px;border:1px solid rgba(93,132,255,.34);border-radius:16px;background:rgba(6,14,38,.82);backdrop-filter:blur(16px);box-shadow:0 20px 48px rgba(2,8,28,.4)}.premium-countdown-label{font-size:11px;font-weight:750;color:#c7d7f1;margin-bottom:10px}.premium-countdown-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:4px}.premium-countdown-grid div{text-align:center}.premium-countdown-grid strong{display:block;font-size:21px;line-height:1;color:#ff5570;font-weight:900}.premium-countdown-grid span{display:block;margin-top:5px;font-size:9px;color:#8293b1}
.premium-capability-bar{position:relative;z-index:3;max-width:1240px;margin:10px auto 0;display:grid;grid-template-columns:repeat(4,1fr);border:1px solid rgba(76,128,255,.26);border-radius:17px;background:rgba(6,18,47,.7);backdrop-filter:blur(16px);box-shadow:0 18px 60px rgba(0,0,0,.18);overflow:hidden}.premium-capability-bar>div{display:grid;grid-template-columns:auto 1fr;grid-template-rows:auto auto;column-gap:11px;padding:18px 22px;border-right:1px solid rgba(94,130,207,.16)}.premium-capability-bar>div:last-child{border-right:0}.cap-icon{grid-row:1/3;align-self:center;font-size:24px;color:#57baff}.premium-capability-bar strong{font-size:14px}.premium-capability-bar small{margin-top:3px;color:#768bab;font-size:10px;line-height:1.4}
@keyframes premiumFloat{0%,100%{transform:translateY(0) rotate(-1deg)}50%{transform:translateY(-12px) rotate(1deg)}}
@media(max-width:980px){.premium-hero-inner{grid-template-columns:1fr;min-height:auto}.premium-hero-copy{text-align:center}.premium-lead{margin-inline:auto}.premium-cta-row,.premium-trust-row{justify-content:center}.premium-hero-art{min-height:500px;max-width:620px;width:100%;margin:0 auto}.premium-capability-bar{grid-template-columns:repeat(2,1fr)}.premium-capability-bar>div:nth-child(2){border-right:0}.premium-capability-bar>div:nth-child(-n+2){border-bottom:1px solid rgba(94,130,207,.16)}}
@media(max-width:620px){.premium-hero{padding:88px 16px 30px}.premium-hero h1{font-size:clamp(40px,12vw,58px)}.premium-lead{font-size:15px}.premium-hero-art{min-height:420px}.premium-logo-stage{width:88%}.premium-chip{font-size:11px;padding:8px 10px}.chip-planner{left:1%;top:20%}.chip-todo{left:0;top:32%}.chip-analytics{left:1%;top:67%}.chip-ai{left:7%;top:79%}.premium-countdown-card{right:0;top:5%;width:190px}.premium-countdown-grid strong{font-size:17px}.premium-capability-bar{grid-template-columns:1fr}.premium-capability-bar>div{border-right:0!important;border-bottom:1px solid rgba(94,130,207,.16)}.premium-capability-bar>div:last-child{border-bottom:0}.premium-trust-row{gap:10px}.premium-cta-row{display:grid;grid-template-columns:1fr;width:100%}.premium-btn{width:100%}}

/* Premium OTP verification */
.otp-premium-card{position:relative;overflow:hidden;border-color:rgba(61,139,255,.32)!important;background:linear-gradient(180deg,rgba(6,18,48,.97),rgba(3,10,29,.98))!important;box-shadow:0 30px 90px rgba(0,10,40,.5),0 0 0 1px rgba(40,167,255,.04) inset!important}
.otp-premium-card:before{content:"";position:absolute;width:230px;height:230px;border-radius:50%;right:-100px;top:-120px;background:radial-gradient(circle,rgba(40,172,255,.2),transparent 68%);pointer-events:none}
.otp-premium-card .brand-mark{width:68px;height:68px;border-radius:18px;margin-right:0;display:inline-grid;place-items:center;box-shadow:0 10px 35px rgba(23,132,255,.25)}
.otp-premium-card .auth-head .brand{display:flex;flex-direction:column;gap:10px;font-size:25px;justify-content:center}.otp-premium-card .auth-head h1{margin-top:22px;font-size:28px}.otp-premium-card .auth-head p{color:#8fa3c2}
.otp-box-row{display:grid;grid-template-columns:repeat(6,1fr);gap:9px;margin-top:9px}.otp-digit{width:100%!important;min-width:0!important;height:58px!important;padding:0!important;text-align:center!important;font-size:23px!important;font-weight:850!important;color:#f6fbff!important;background:linear-gradient(180deg,rgba(15,32,70,.95),rgba(8,20,48,.95))!important;border:1px solid rgba(91,132,213,.32)!important;border-radius:11px!important;box-shadow:inset 0 1px 0 rgba(255,255,255,.025)}.otp-digit:focus{border-color:#27b6ff!important;box-shadow:0 0 0 3px rgba(39,182,255,.11),0 0 24px rgba(92,54,255,.12)!important;outline:0}.otp-hint{text-align:center;margin-top:10px!important;color:#657b9e!important}
.otp-premium-card .btn-primary{background:linear-gradient(100deg,#11b9ff,#8c28ff)!important;border:0!important;box-shadow:0 12px 38px rgba(66,91,255,.26)!important}
@media(max-width:520px){.otp-box-row{gap:6px}.otp-digit{height:52px!important;font-size:20px!important}.otp-premium-card .brand-mark{width:58px;height:58px}}


/* Landing-page live AI demo + FAQ */
.sr-only{position:absolute!important;width:1px!important;height:1px!important;padding:0!important;margin:-1px!important;overflow:hidden!important;clip:rect(0,0,0,0)!important;white-space:nowrap!important;border:0!important}
.ai-demo-form{display:grid;grid-template-columns:1fr auto;gap:10px;margin:14px 0 8px}.ai-demo-form input{min-width:0;border:1px solid var(--border2);background:var(--bg);border-radius:11px;padding:12px 14px;outline:none}.ai-demo-form input:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(var(--accent-rgb),.12)}.ai-demo-status{min-height:22px;margin:6px 0 10px;color:var(--text2);font-size:13px}.ai-demo-answer{white-space:pre-wrap;background:var(--bg);border:1px solid var(--border);border-radius:12px;padding:16px;line-height:1.65}.ai-demo-fallback[hidden],.ai-demo-answer[hidden]{display:none!important}
.faq-list{max-width:860px;margin:0 auto;display:grid;gap:12px}.faq-list details{background:linear-gradient(180deg,var(--bg2),var(--bg));border:1px solid var(--border);border-radius:14px;padding:0 18px}.faq-list summary{cursor:pointer;list-style:none;padding:18px 34px 18px 0;font-weight:750;position:relative}.faq-list summary::-webkit-details-marker{display:none}.faq-list summary:after{content:'+';position:absolute;right:2px;top:50%;transform:translateY(-50%);font-size:22px;color:var(--accent)}.faq-list details[open] summary:after{content:'−'}.faq-list details p{padding:0 0 18px;color:var(--text2)}
@media(max-width:640px){.ai-demo-form{grid-template-columns:1fr}.ai-demo-form .btn{width:100%}}

/* v9 landing personalization */
.landing-personalizer{display:flex;align-items:center;gap:6px;flex-wrap:wrap;margin-top:14px;font-size:11px;color:var(--muted,#9ba7b8)}
.landing-personalizer button{border:1px solid rgba(255,255,255,.12);background:rgba(255,255,255,.04);color:inherit;border-radius:999px;padding:5px 9px;cursor:pointer;font:inherit}
.landing-personalizer button.active{border-color:rgba(240,165,0,.5);color:#ffd77a;background:rgba(240,165,0,.1)}


/* SEO resource hub */
.resource-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.resource-card{display:block;border:1px solid var(--border,#242d3a);background:var(--bg2,#11161d);border-radius:16px;padding:22px;color:inherit;text-decoration:none;transition:transform .18s ease,border-color .18s ease,background .18s ease}
.resource-card:hover{transform:translateY(-2px);border-color:rgba(240,165,0,.55);background:#151b24}
.resource-card>span{font-size:24px}.resource-card h3{margin:12px 0 8px;font-size:18px}.resource-card p{margin:0;color:var(--text2,#94a3b3);line-height:1.65;font-size:14px}
@media(max-width:900px){.resource-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:620px){.resource-grid{grid-template-columns:1fr}}
/* ===== StudyDesk v11 — live study tracker + healthy retention loop ===== */
.hero-cockpit{position:absolute;inset:32px 0 24px 16px;padding:22px;border:1px solid rgba(85,145,255,.34);border-radius:24px;background:linear-gradient(180deg,rgba(8,20,52,.96),rgba(5,12,32,.98));box-shadow:0 28px 80px rgba(0,0,0,.38),inset 0 1px 0 rgba(255,255,255,.05);overflow:hidden}.hero-cockpit:before{content:"";position:absolute;inset:-35% 45% 55% -10%;background:radial-gradient(circle,rgba(39,178,255,.2),transparent 66%);pointer-events:none}.hero-cockpit-top,.hero-cockpit-brand,.hero-cockpit-row,.hero-kpis,.hero-current-card{position:relative;z-index:1}.hero-cockpit-top{display:flex;align-items:center;justify-content:space-between;gap:14px}.hero-cockpit-brand{display:flex;align-items:center;gap:12px}.hero-cockpit-brand img{width:42px;height:42px;border-radius:12px;object-fit:cover}.hero-cockpit-brand strong,.hero-cockpit-brand span{display:block}.hero-cockpit-brand strong{font-size:16px}.hero-cockpit-brand span{font-size:11px;color:#7f94b9}.hero-live-dot{font-size:10px;letter-spacing:.13em;color:#82f3bd;border:1px solid rgba(75,221,151,.3);background:rgba(37,177,114,.1);border-radius:999px;padding:6px 9px}.hero-kpis{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:22px 0 12px}.hero-kpis>div{padding:13px;border-radius:13px;border:1px solid rgba(102,139,208,.18);background:rgba(13,27,58,.65)}.hero-kpis span,.hero-cockpit-row span{display:block;font-size:10px;color:#768bad;text-transform:uppercase;letter-spacing:.06em}.hero-kpis strong{display:block;margin-top:5px;font-size:18px;color:#f4f8ff}.hero-progress-line{height:8px;border-radius:999px;background:#101b34;overflow:hidden;margin-bottom:18px}.hero-progress-line span{display:block;height:100%;width:0;border-radius:inherit;background:linear-gradient(90deg,#21bdff,#7258ff,#ca4dff);transition:width .35s ease}.hero-current-card{padding:17px;border:1px solid rgba(91,151,255,.25);border-radius:16px;background:linear-gradient(135deg,rgba(24,71,139,.3),rgba(21,31,77,.55))}.hero-current-card .hero-current-label{display:block;color:#7fbefb;font-size:10px;font-weight:800;letter-spacing:.1em}.hero-current-card strong{display:block;font-size:18px;margin:6px 0 3px}.hero-current-card small{display:block;color:#90a3c2;line-height:1.5}.hero-start-link{display:inline-flex;margin-top:12px;color:#78d9ff;font-size:13px;font-weight:800}.hero-cockpit-row{display:grid;grid-template-columns:.65fr 1.35fr;gap:10px;margin-top:12px}.hero-cockpit-row>div{border:1px solid rgba(102,139,208,.18);border-radius:13px;background:rgba(13,27,58,.52);padding:11px}.hero-cockpit-row>div>strong{display:block;margin-top:6px}.hero-countdown-mini .premium-countdown-grid{margin-top:7px}.hero-countdown-mini .premium-countdown-grid strong{font-size:13px}.hero-countdown-mini .premium-countdown-grid span{font-size:7px}.hero-privacy-note{position:relative;z-index:1;margin:12px 2px 0;color:#6f82a2;font-size:10px;line-height:1.45}

.tracker-lab{background:radial-gradient(circle at 18% 8%,rgba(43,134,255,.08),transparent 28%),var(--bg)}.tracker-layout{display:grid;grid-template-columns:.92fr 1.08fr;gap:20px;align-items:stretch}.tracker-panel,.habit-card{border:1px solid var(--border);border-radius:20px;background:linear-gradient(180deg,var(--bg2),rgba(13,18,26,.95));box-shadow:0 22px 65px rgba(0,0,0,.16)}.tracker-panel{padding:24px}.tracker-panel-head{display:flex;gap:13px;align-items:flex-start;margin-bottom:22px}.tracker-panel-head>span{display:grid;place-items:center;width:34px;height:34px;border-radius:10px;background:rgba(67,132,255,.12);border:1px solid rgba(80,142,255,.25);color:#8fc4ff;font-weight:850;font-size:12px}.tracker-panel-head h3{font-size:19px;margin:0 0 3px}.tracker-panel-head p{margin:0;color:var(--text2);font-size:13px}.tracker-form,.session-fields{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.tracker-form label,.session-fields label{display:grid;gap:7px;color:#a9b5c4;font-size:12px;font-weight:750}.tracker-form input,.tracker-form select,.session-fields input,.session-fields select,.mission-add input{width:100%;min-width:0;border:1px solid var(--border2);border-radius:11px;background:#0a1018;color:var(--text);padding:12px 13px;font:inherit;outline:none}.tracker-form input:focus,.tracker-form select:focus,.session-fields input:focus,.session-fields select:focus,.mission-add input:focus{border-color:#4f8cff;box-shadow:0 0 0 3px rgba(79,140,255,.12)}.tracker-wide{width:100%;grid-column:1/-1}.setup-result{display:grid;gap:3px;margin-top:14px;padding:13px;border-radius:12px;background:rgba(64,137,255,.08);border:1px solid rgba(83,145,255,.18);min-height:0}.setup-result:empty{display:none}.setup-result strong{font-size:13px;color:#dceaff}.setup-result span{font-size:12px;color:#8fa3bf}.focus-clock{font-variant-numeric:tabular-nums;font-size:clamp(42px,7vw,70px);letter-spacing:-.045em;font-weight:850;text-align:center;padding:28px 8px 18px;background:linear-gradient(90deg,#e8f4ff,#9fd7ff 55%,#bcb4ff);-webkit-background-clip:text;background-clip:text;color:transparent}.focus-actions{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}.daily-progress-card{margin-top:18px;padding:15px;border-radius:14px;background:#0b111a;border:1px solid #1e2b3c}.daily-progress-card>div:first-child{display:flex;align-items:center;justify-content:space-between;gap:16px}.daily-progress-card span{font-size:12px;color:#95a5b8}.daily-progress-card strong{font-size:13px}.tracker-progress,.mission-progress{height:8px;background:#151f2c;border-radius:999px;overflow:hidden;margin:11px 0 8px}.tracker-progress span,.mission-progress span{display:block;width:0;height:100%;border-radius:inherit;background:linear-gradient(90deg,#12bdf3,#5c7cff,#ad5cff);transition:width .35s ease}.daily-progress-card small{color:#728096}.session-complete{display:grid;gap:4px;margin-top:14px;padding:14px;border-radius:13px;border:1px solid rgba(46,205,132,.2);background:rgba(36,173,111,.08)}.session-complete strong{color:#9bf0c5}.session-complete span,.session-complete small{color:#9fb0c3}

.habit-grid{display:grid;grid-template-columns:1.1fr .9fr 1fr;gap:18px}.habit-card{padding:22px}.habit-card-top{display:flex;align-items:flex-start;justify-content:space-between;gap:12px}.habit-card-top>strong{font-size:22px;color:#91ddff}.mini-label{display:block;color:#7188a8;font-size:10px;letter-spacing:.13em;font-weight:850}.habit-card h3{margin:5px 0 0;font-size:18px}.mission-list{display:grid;gap:9px}.mission-item{display:flex;gap:10px;align-items:flex-start;padding:10px 11px;border-radius:11px;border:1px solid #222d3d;background:#0c121a;color:#aab7c7;font-size:13px;cursor:pointer}.mission-item input{margin-top:3px;accent-color:#55a8ff}.mission-item.done{opacity:.62}.mission-item.done span{text-decoration:line-through}.mission-add{display:grid;grid-template-columns:1fr 42px;gap:8px;margin-top:10px}.mission-add input{padding:10px 12px}.mission-add button{border:1px solid #38527a;border-radius:10px;background:#15284a;color:#9fd3ff;font-size:20px;cursor:pointer}.next-card{display:flex;flex-direction:column}.next-action-icon{display:grid;place-items:center;width:56px;height:56px;border-radius:18px;margin:18px 0 8px;background:linear-gradient(135deg,rgba(31,191,255,.18),rgba(125,83,255,.18));border:1px solid rgba(89,147,255,.23);font-size:26px}.next-card p{color:var(--text2);font-size:13px;line-height:1.65;flex:1}.next-meta{display:flex;gap:8px;flex-wrap:wrap;margin:15px 0}.next-meta span{padding:6px 9px;border-radius:999px;background:#111b29;border:1px solid #24344b;color:#93a9c4;font-size:11px}.week-total{font-size:32px;font-weight:850;margin:8px 0 12px}.week-bars{height:130px;display:grid;grid-template-columns:repeat(7,1fr);gap:7px;align-items:end;padding:8px 0 0}.week-bar-col{height:100%;display:grid;grid-template-rows:1fr auto;gap:6px;align-items:end}.week-bar-col span{width:100%;min-height:4px;border-radius:7px 7px 3px 3px;background:linear-gradient(180deg,#61c8ff,#626eff);opacity:.85}.week-bar-col small{text-align:center;color:#64748a;font-size:9px}.week-stats{display:grid;grid-template-columns:1fr;gap:8px;margin-top:13px}.week-stats>div{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-top:8px;border-top:1px solid #202b39}.week-stats span{font-size:11px;color:#72839a}.week-stats strong{font-size:12px;text-align:right}.weekly-insight{margin:14px 0 0;color:#8799b0;font-size:12px;line-height:1.6}

.resource-clusters{display:grid;gap:26px}.resource-cluster{display:grid;grid-template-columns:200px 1fr;gap:18px;align-items:start}.cluster-head{position:sticky;top:92px;padding:16px 0}.cluster-head>span{font-size:10px;letter-spacing:.14em;font-weight:900;color:#6f9bff}.cluster-head h3{font-size:19px;margin-top:5px}.resource-grid.compact{grid-template-columns:repeat(2,minmax(0,1fr))}

@media(max-width:980px){.hero-cockpit{position:relative;inset:auto;height:auto;min-height:485px}.premium-hero-art{min-height:auto}.tracker-layout,.habit-grid{grid-template-columns:1fr}.resource-cluster{grid-template-columns:1fr}.cluster-head{position:static;padding-bottom:0}.resource-grid.compact{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:620px){.hero-cockpit{padding:16px;min-height:0}.hero-kpis{grid-template-columns:1fr 1fr}.hero-kpis>div:last-child{grid-column:1/-1}.hero-cockpit-row{grid-template-columns:1fr}.tracker-panel,.habit-card{padding:18px}.tracker-form,.session-fields{grid-template-columns:1fr}.resource-grid.compact{grid-template-columns:1fr}.focus-actions .btn{flex:1 1 28%}.daily-progress-card>div:first-child{align-items:flex-start;flex-direction:column}.week-bars{height:105px}}

/* ============================================================
   StudyDesk homepage 2026 — isolated premium landing-page system
   All selectors are scoped to .sd-home-page / .sd-* to avoid
   changing shared public/auth pages.
   ============================================================ */
.sd-home-page{--sd-navy:#07111f;--sd-navy-2:#0a1730;--sd-panel:#0b1b32;--sd-panel-2:#0d213c;--sd-line:rgba(108,163,235,.22);--sd-line-strong:rgba(78,155,255,.44);--sd-blue:#3aa7ff;--sd-blue-2:#197cff;--sd-gold:#ffc657;--sd-green:#39d69f;--sd-violet:#9d72ff;--sd-soft:#90a7c7;background:#06101d;color:#f4f7fb;overflow-x:hidden}
.sd-home-page .nav{background:rgba(5,14,27,.84);border-bottom:1px solid rgba(89,139,203,.16);backdrop-filter:blur(18px)}
.sd-home-page .nav-inner{max-width:1240px;padding-block:12px}.sd-home-brand{font-size:18px}.sd-home-page .brand-mark{background:transparent;border:0;box-shadow:none}.sd-home-page .brand-mark img{border-radius:9px}.sd-home-page .nav-links a{color:#a9b9cf}.sd-home-page .nav-links a:hover{background:rgba(80,142,229,.1);color:#fff}.sd-home-page .sd-nav-cta{color:#101827!important;background:linear-gradient(135deg,#ffda7a,#f2ad35);border:0;box-shadow:0 8px 28px rgba(234,168,54,.2)}
.sd-home-page .container{max-width:1240px}.sd-home-page .section{padding:96px 0}.sd-kicker{display:inline-flex;align-items:center;gap:8px;font-size:11px;line-height:1;font-weight:900;letter-spacing:.16em;color:#8dd7ff;text-transform:uppercase}.sd-kicker:before{content:"";width:18px;height:1px;background:currentColor;opacity:.7}
.sd-home-hero{position:relative;min-height:640px;display:flex;align-items:center;padding:78px 0 62px;overflow:hidden;background:radial-gradient(1000px 520px at 76% 25%,rgba(28,97,236,.19),transparent 65%),linear-gradient(180deg,#06101d 0%,#071424 100%)}
.sd-home-hero:after{content:"";position:absolute;inset:auto 0 0;height:1px;background:linear-gradient(90deg,transparent,rgba(44,132,255,.55),transparent)}.sd-home-glow{position:absolute;border-radius:50%;filter:blur(4px);pointer-events:none}.sd-home-glow-one{width:520px;height:520px;right:-190px;top:-220px;background:radial-gradient(circle,rgba(21,90,233,.26),transparent 68%)}.sd-home-glow-two{width:560px;height:360px;left:-250px;bottom:-180px;background:radial-gradient(circle,rgba(24,144,255,.12),transparent 70%)}
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