/* ============================================================
   Tatv University — LMS app stylesheet (gurukul skin)
   Shared brand system: void/gold/saffron/indigo/pearl,
   Fraunces / Hanken Grotesk / DM Mono / Tiro Devanagari,
   borderless liquid-glass panels. Accessible: 18px body floor,
   44px touch targets, focus-visible rings, reduced-motion.
   ============================================================ */
:root{
  --void:#050508; --void2:#0a0a14;
  --gold:#e8b84b; --gold-dim:rgba(232,184,75,.45); --gold-faint:rgba(232,184,75,.14);
  --saffron:#E8650A; --indigo:#1E2F8F; --indigo-glow:rgba(30,47,143,.35);
  --pearl:#f0ede4; --pearl-dim:rgba(240,237,228,.62); --pearl-faint:rgba(240,237,228,.34);
  --serif:'Instrument Serif',serif;
  --display:'Fraunces',Georgia,serif;
  --sans:'Hanken Grotesk',system-ui,sans-serif;
  --mono:'DM Mono',monospace;
  --deva:'Tiro Devanagari Sanskrit',serif;
  --ok:#6fd08a; --err:#e8765f;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  background:var(--void);
  color:var(--pearl);
  font-family:var(--sans);
  font-size:18px;line-height:1.7;
  min-height:100vh;overflow-x:hidden;
}
::selection{background:var(--saffron);color:var(--void)}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{font-family:var(--display);font-weight:300;line-height:1.1}
.deva{font-family:var(--deva)}

/* warm helix-nebula backdrop, dimmer than the landing so UI reads clearly */
body::before{content:"";position:fixed;inset:-6%;z-index:-2;pointer-events:none;
  background:#050508 url(nebula.jpg) center/cover no-repeat;opacity:.9}
body::after{content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;
  background:linear-gradient(168deg,rgba(8,6,4,.55),rgba(5,5,8,.82) 45%,rgba(8,6,4,.66) 75%,rgba(5,5,8,.86));
  backdrop-filter:blur(16px) saturate(1.15);-webkit-backdrop-filter:blur(16px) saturate(1.15)}

/* ---------- glass primitives ---------- */
.glass{border:0;border-radius:22px;
  background:linear-gradient(168deg,rgba(255,255,255,.12),rgba(255,255,255,.04) 55%,rgba(255,255,255,.08));
  backdrop-filter:blur(22px) saturate(1.5);-webkit-backdrop-filter:blur(22px) saturate(1.5);
  box-shadow:inset 0 1.5px 1px rgba(255,255,255,.4),inset 0 -1px 0 rgba(255,255,255,.07),0 24px 70px rgba(0,0,0,.42)}

button,.btn{font-family:var(--mono);font-size:12px;letter-spacing:.18em;text-transform:uppercase;
  cursor:pointer;min-height:44px;padding:.85rem 1.6rem;border:0;border-radius:14px;color:var(--pearl);
  background:linear-gradient(168deg,rgba(255,255,255,.18),rgba(255,255,255,.06));
  box-shadow:inset 0 1px 0 rgba(255,255,255,.45),0 10px 26px rgba(0,0,0,.3);
  transition:transform .22s cubic-bezier(.22,.8,.24,1),box-shadow .3s,opacity .2s}
button:hover,.btn:hover{transform:translateY(-2px);box-shadow:inset 0 1px 0 rgba(255,255,255,.55),0 0 30px rgba(232,184,75,.24),0 14px 34px rgba(0,0,0,.34)}
button:focus-visible,.btn:focus-visible,a:focus-visible,input:focus-visible{outline:2px solid var(--gold);outline-offset:3px}
button:disabled{opacity:.5;cursor:not-allowed;transform:none}
.btn-gold{color:var(--void);font-weight:500;
  background:linear-gradient(135deg,#f6d98a 0%,var(--gold) 55%,var(--saffron) 100%);
  box-shadow:0 10px 28px rgba(232,184,75,.28),inset 0 1px 0 rgba(255,255,255,.5)}
.btn-gold:hover{box-shadow:0 14px 40px rgba(232,184,75,.4),inset 0 1px 0 rgba(255,255,255,.6)}
.btn-ghost{background:transparent;box-shadow:inset 0 0 0 1px var(--gold-dim)}
.btn-sm{min-height:38px;padding:.55rem 1.1rem;font-size:11px}

input,textarea{font-family:var(--sans);font-size:18px;color:var(--pearl);width:100%;
  background:linear-gradient(168deg,rgba(255,255,255,.14),rgba(255,255,255,.05));
  border:0;border-radius:14px;padding:.85rem 1.1rem;outline:none;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.35),inset 0 -1px 0 rgba(255,255,255,.06)}
input:focus,textarea:focus{box-shadow:inset 0 1px 0 rgba(255,255,255,.45),0 0 0 2px rgba(232,184,75,.4)}
.kicker{font-family:var(--mono);font-size:11px;letter-spacing:.4em;text-transform:uppercase;color:var(--gold);opacity:.92}

/* ---------- top bar ---------- */
.topbar{position:sticky;top:0;z-index:30;display:flex;align-items:center;justify-content:space-between;
  gap:1rem;padding:1rem 1.6rem;backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  background:linear-gradient(180deg,rgba(5,5,8,.82),rgba(5,5,8,.4));border-bottom:1px solid var(--gold-faint)}
.brand{display:flex;align-items:baseline;gap:.6rem}
.brand .mark{font-family:var(--serif);font-size:1.5rem;color:var(--gold);letter-spacing:.01em}
.brand .sub{font-family:var(--mono);font-size:9.5px;letter-spacing:.3em;text-transform:uppercase;color:var(--pearl-faint)}
.nav{display:flex;align-items:center;gap:.4rem;flex-wrap:wrap}
.nav .navlink{font-family:var(--mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--pearl-dim);padding:.65rem .9rem;border-radius:12px;cursor:pointer;min-height:44px;display:inline-flex;align-items:center;transition:color .2s,background .2s}
.nav .navlink:hover{color:var(--pearl)}
.nav .navlink.active{color:var(--gold);background:rgba(232,184,75,.1)}
.who{display:flex;align-items:center;gap:.7rem}
.who .email{font-family:var(--mono);font-size:11px;color:var(--pearl-dim);max-width:180px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ---------- layout ---------- */
.wrap{max-width:1100px;margin:0 auto;padding:3rem 1.6rem 8rem}
.view{display:none;animation:fade .4s ease}
.view.active{display:block}
@keyframes fade{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
.view-head{margin-bottom:2.6rem}
.view-head h1{font-family:var(--serif);font-size:clamp(2rem,5vw,3.2rem);margin-top:.6rem}
.view-head p{color:var(--pearl-dim);font-size:15px;max-width:620px;margin-top:.8rem;line-height:1.85}

/* ---------- catalog ---------- */
.subject-group{margin-bottom:3.4rem}
.subject-group > h2{font-family:var(--serif);font-size:1.7rem;margin-bottom:.3rem;color:var(--pearl)}
.subject-group > .sg-deva{font-family:var(--deva);color:var(--gold-dim);font-size:1.1rem;margin-bottom:1.4rem;display:block}
.course-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1.4rem}
.course-card{padding:1.8rem 1.7rem;cursor:pointer;display:flex;flex-direction:column;min-height:200px;
  transition:transform .35s cubic-bezier(.22,.8,.24,1),box-shadow .4s}
.course-card:hover{transform:translateY(-4px);box-shadow:inset 0 1.5px 1px rgba(255,255,255,.5),0 0 46px rgba(232,184,75,.18),0 24px 70px rgba(0,0,0,.42)}
.course-card .glyph{font-family:var(--display);font-size:2rem;color:var(--gold);margin-bottom:.9rem;text-shadow:0 0 24px rgba(232,184,75,.4)}
.course-card h3{font-family:var(--serif);font-weight:400;font-size:1.4rem;line-height:1.15}
.course-card .blurb{color:var(--pearl-dim);font-size:13px;line-height:1.7;margin-top:.6rem;flex:1}
.course-card .meta{margin-top:1.2rem;display:flex;align-items:center;justify-content:space-between;gap:.6rem;flex-wrap:wrap}
.badge{font-family:var(--mono);font-size:10px;letter-spacing:.16em;text-transform:uppercase;padding:.3rem .7rem;border-radius:999px}
.badge.enrolled{color:var(--gold);box-shadow:inset 0 0 0 1px var(--gold-dim)}
.badge.lessons{color:var(--pearl-faint);box-shadow:inset 0 0 0 1px rgba(240,237,228,.18)}

/* ---------- progress ---------- */
.bar{height:8px;border-radius:999px;background:rgba(255,255,255,.08);overflow:hidden;box-shadow:inset 0 1px 2px rgba(0,0,0,.4)}
.bar > i{display:block;height:100%;border-radius:999px;
  background:linear-gradient(90deg,var(--gold),var(--saffron));transition:width .6s cubic-bezier(.22,.8,.24,1)}
.bar-wrap{width:100%}
.bar-wrap .pct{font-family:var(--mono);font-size:10px;letter-spacing:.14em;color:var(--pearl-dim);margin-top:.4rem;display:block}

/* progress ring (My Learning) */
.ring{--p:0;width:80px;height:80px;border-radius:50%;display:grid;place-items:center;flex-shrink:0;
  background:radial-gradient(closest-side,var(--void2) 73%,transparent 74%),
    conic-gradient(var(--gold) calc(var(--p)*1%),rgba(255,255,255,.08) 0)}
.ring span{font-family:var(--serif);font-size:1.3rem;color:var(--gold)}

/* ---------- course detail ---------- */
.detail-top{display:flex;gap:1.4rem;align-items:flex-start;flex-wrap:wrap;margin-bottom:2rem}
.detail-top .glyph{font-family:var(--display);font-size:3rem;color:var(--gold);text-shadow:0 0 30px rgba(232,184,75,.4)}
.lesson-list{list-style:none;display:flex;flex-direction:column;gap:.8rem;margin-top:1.6rem}
.lesson-row{display:flex;align-items:center;gap:1rem;padding:1.1rem 1.3rem;cursor:pointer;
  transition:transform .25s,box-shadow .3s}
.lesson-row:hover{transform:translateX(4px)}
.lesson-row .tick{width:26px;height:26px;border-radius:50%;flex-shrink:0;display:grid;place-items:center;
  font-size:13px;box-shadow:inset 0 0 0 1.5px var(--gold-dim);color:transparent;transition:all .3s}
.lesson-row.done .tick{background:linear-gradient(135deg,var(--gold),var(--saffron));color:var(--void);box-shadow:none}
.lesson-row .l-title{flex:1}
.lesson-row .l-title b{font-family:var(--sans);font-weight:600;font-size:16px;display:block}
.lesson-row .l-title small{font-family:var(--mono);font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:var(--pearl-faint)}
.lesson-row .l-kind{font-family:var(--mono);font-size:9.5px;letter-spacing:.18em;text-transform:uppercase;color:var(--saffron);padding:.25rem .6rem;border-radius:999px;box-shadow:inset 0 0 0 1px rgba(232,101,10,.35)}

/* ---------- lesson player ---------- */
.lesson-body{font-size:18px;line-height:1.85;color:var(--pearl-dim)}
.lesson-body h1,.lesson-body h2,.lesson-body h3{color:var(--pearl);margin:1.6rem 0 .8rem}
.lesson-body p{margin:1rem 0}
.lesson-body ul,.lesson-body ol{margin:1rem 0 1rem 1.4rem}
.lesson-body code{font-family:var(--mono);background:rgba(255,255,255,.08);padding:.1rem .4rem;border-radius:6px;font-size:.85em}
.lesson-body strong{color:var(--pearl)}
.video-frame{position:relative;width:100%;aspect-ratio:16/9;border-radius:18px;overflow:hidden;margin:1.6rem 0;box-shadow:0 24px 70px rgba(0,0,0,.5)}
.video-frame iframe,.video-frame video{position:absolute;inset:0;width:100%;height:100%;border:0}
.interactive-slot{margin:1.8rem 0;padding:2.4rem;border-radius:18px;text-align:center;
  box-shadow:inset 0 0 0 1.5px var(--gold-faint);background:radial-gradient(ellipse 70% 90% at 50% 0%,rgba(232,184,75,.08),transparent 70%)}
.interactive-slot .ph{font-family:var(--mono);font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:var(--gold)}
.interactive-slot .ph small{display:block;color:var(--pearl-faint);letter-spacing:.1em;margin-top:.6rem;text-transform:none;font-size:11px}
.player-actions{display:flex;align-items:center;gap:1rem;flex-wrap:wrap;margin-top:2.4rem;padding-top:2rem;border-top:1px solid var(--gold-faint)}

/* ---------- states ---------- */
.loading{display:flex;flex-direction:column;align-items:center;gap:1.2rem;padding:5rem 1rem;color:var(--pearl-dim)}
.spinner{width:42px;height:42px;border-radius:50%;border:3px solid rgba(232,184,75,.18);border-top-color:var(--gold);animation:spin 1s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.empty,.errorbox{text-align:center;padding:4rem 1.6rem;max-width:520px;margin:0 auto}
.empty .glyph,.errorbox .glyph{font-family:var(--display);font-size:2.6rem;color:var(--gold-dim);margin-bottom:1rem}
.empty h3,.errorbox h3{font-family:var(--serif);font-weight:400;font-size:1.6rem;color:var(--pearl)}
.empty p,.errorbox p{color:var(--pearl-dim);font-size:14px;margin-top:.8rem;line-height:1.8}
.errorbox{box-shadow:inset 0 0 0 1px rgba(232,118,95,.3);border-radius:22px;background:rgba(232,118,95,.05)}
.errorbox .glyph{color:var(--err)}

.crumbs{font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--pearl-faint);margin-bottom:1.2rem;display:flex;gap:.5rem;align-items:center}
.crumbs a{color:var(--gold-dim);cursor:pointer}.crumbs a:hover{color:var(--gold)}

/* ---------- login modal ---------- */
.modal-scrim{position:fixed;inset:0;z-index:100;display:none;align-items:center;justify-content:center;padding:1.4rem;
  background:rgba(5,5,8,.7);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px)}
.modal-scrim.open{display:flex}
.modal{width:100%;max-width:440px;padding:2.6rem 2.4rem;position:relative}
.modal h2{font-family:var(--serif);font-size:2rem;margin-top:.6rem}
.modal p.sub{color:var(--pearl-dim);font-size:14px;margin-top:.6rem;line-height:1.8}
.modal .field{margin-top:1.6rem;display:flex;flex-direction:column;gap:.5rem}
.modal label{font-family:var(--mono);font-size:10px;letter-spacing:.24em;text-transform:uppercase;color:var(--saffron)}
.modal .actions{margin-top:1.8rem;display:flex;gap:.8rem;flex-direction:column}
.modal .msg{margin-top:1rem;font-size:13px;min-height:1.2em}
.modal .msg.err{color:var(--err)}.modal .msg.ok{color:var(--ok)}
.modal-close{position:absolute;top:1rem;right:1rem;min-height:auto;padding:.4rem .6rem;font-size:14px;background:none;box-shadow:none}
.modal-close:hover{transform:none;box-shadow:none;color:var(--gold)}
.codebox{letter-spacing:.5em;text-align:center;font-family:var(--mono);font-size:24px}

.toast{position:fixed;left:50%;bottom:28px;transform:translateX(-50%) translateY(20px);z-index:120;
  padding:.9rem 1.5rem;border-radius:14px;font-family:var(--mono);font-size:12px;letter-spacing:.12em;
  opacity:0;pointer-events:none;transition:opacity .3s,transform .3s;color:var(--void);
  background:linear-gradient(135deg,#f6d98a,var(--gold));box-shadow:0 14px 40px rgba(232,184,75,.4)}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

@media (max-width:680px){
  .topbar{flex-wrap:wrap}
  .who .email{display:none}
  .wrap{padding-top:2rem}
}
@media (prefers-reduced-motion:reduce){
  body::before{animation:none}
  *{transition-duration:.01ms !important;animation-duration:.01ms !important}
  .spinner{animation:spin 1s linear infinite !important}
}