/* =============================================================
   UniAdmit — shared stylesheet (plain CSS, mobile-first)
   Primary #75C8FF · Secondary #F1FF75
   ============================================================= */
:root{
  --primary:#75C8FF;
  --primary-dark:#2E9BE0;
  --primary-tint:#EAF6FF;
  --secondary:#F1FF75;
  --secondary-dark:#D7E64B;
  --ink:#152232;
  --ink-soft:#54637A;
  --bg:#F7FAFC;
  --card:#FFFFFF;
  --border:#E3EAF1;
  --border-strong:#BFE3FA;
  --radius:16px;
  --radius-sm:10px;
  --shadow:0 2px 8px rgba(21,34,50,.06);
  --shadow-lg:0 10px 30px rgba(21,34,50,.10);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;font-family:Inter,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  background:var(--bg);color:var(--ink);font-size:16px;line-height:1.6;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:var(--primary-dark);text-decoration:none}
.container{width:100%;max-width:1160px;margin:0 auto;padding:0 18px}

/* ---------- Navbar ---------- */
.nav{position:sticky;top:0;z-index:50;background:#fff;border-bottom:1px solid var(--border)}
.nav-inner{display:flex;flex-wrap:wrap;align-items:center;gap:12px;min-height:66px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.22rem;color:var(--ink)}
.brand-mark{
  width:38px;height:38px;border-radius:12px;display:grid;place-items:center;
  background:var(--primary);color:#0F2438;font-weight:800;font-size:1rem;
  box-shadow:inset 0 -10px 0 rgba(255,255,255,.18)
}
.nav-toggle{
  margin-left:auto;width:48px;height:48px;border-radius:12px;border:1px solid var(--border);
  background:#fff;display:grid;place-items:center;gap:4px;cursor:pointer;padding:12px
}
.nav-toggle span{display:block;width:22px;height:2px;background:var(--ink);border-radius:2px}
.nav-menu{display:none;width:100%;flex-direction:column;gap:6px;padding:8px 0 16px}
.nav-menu.open{display:flex}
.nav-link{
  display:block;padding:14px 14px;border-radius:var(--radius-sm);font-weight:600;color:var(--ink);
  min-height:48px
}
.nav-link.active{background:var(--primary-tint);color:var(--primary-dark)}
.nav-auth{display:flex;flex-direction:column;gap:8px;padding-top:6px;border-top:1px solid var(--border)}
.nav-user{font-size:.9rem;color:var(--ink-soft);padding:6px 14px;word-break:break-all}

/* ---------- Search ---------- */
.search{position:relative;width:100%;padding:6px 0 4px}
.search input{
  width:100%;min-height:48px;padding:12px 16px;font-size:1rem;font-family:inherit;
  border:1px solid var(--border);border-radius:999px;background:#fff;color:var(--ink)
}
.search input:focus{outline:3px solid var(--primary-tint);border-color:var(--primary)}
.search-results{
  position:absolute;left:0;right:0;top:100%;background:#fff;border:1px solid var(--border);
  border-radius:var(--radius);box-shadow:var(--shadow-lg);max-height:60vh;overflow:auto;display:none;z-index:60
}
.search-results.open{display:block}
.search-item{display:block;padding:14px 16px;border-bottom:1px solid var(--border);color:var(--ink)}
.search-item:last-child{border-bottom:0}
.search-item small{display:block;color:var(--ink-soft);font-size:.78rem;text-transform:uppercase;letter-spacing:.04em}
.search-empty{padding:16px;color:var(--ink-soft)}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;
  padding:12px 20px;border-radius:999px;font-weight:700;font-size:1rem;font-family:inherit;
  border:1px solid transparent;cursor:pointer;text-align:center
}
.btn-primary{background:var(--primary);color:#0F2438}
.btn-primary:active{background:var(--primary-dark);color:#fff}
.btn-secondary{background:var(--secondary);color:#2B3110}
.btn-outline{background:#fff;border-color:var(--border-strong);color:var(--primary-dark)}
.btn-block{width:100%}

/* ---------- Layout blocks ---------- */
.hero{padding:38px 0 26px}
.hero-card{
  background:linear-gradient(150deg,var(--primary-tint),#fff 65%);
  border:1px solid var(--border-strong);border-radius:26px;padding:28px 22px;box-shadow:var(--shadow)
}
.eyebrow{display:inline-block;background:var(--secondary);color:#2B3110;font-weight:700;
  font-size:.78rem;letter-spacing:.08em;text-transform:uppercase;padding:6px 12px;border-radius:999px}
h1{font-size:1.9rem;line-height:1.25;margin:14px 0 10px}
h2{font-size:1.4rem;margin:0 0 12px}
h3{font-size:1.06rem;margin:0 0 6px}
.lead{color:var(--ink-soft);margin:0 0 20px;font-size:1.02rem}
.hero-actions{display:flex;flex-wrap:wrap;gap:10px}
section{padding:12px 0 30px}
.section-head{margin-bottom:14px}
.section-head p{color:var(--ink-soft);margin:4px 0 0}

.grid{display:grid;gap:14px;grid-template-columns:1fr}
.card{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius);
  padding:20px;box-shadow:var(--shadow);display:block;color:var(--ink)
}
.card .card-icon{
  width:44px;height:44px;border-radius:14px;background:var(--primary-tint);
  display:grid;place-items:center;font-size:1.3rem;margin-bottom:12px
}
.card p{margin:0;color:var(--ink-soft);font-size:.94rem}
.card-cta{margin-top:14px;font-weight:700;color:var(--primary-dark)}

/* ---------- Accordions (books / videos) ---------- */
.subject{background:#fff;border:1px solid var(--border);border-radius:var(--radius);
  box-shadow:var(--shadow);margin-bottom:14px;overflow:hidden}
.subject>summary,.paper>summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;gap:12px;
  min-height:60px;padding:16px 18px;font-weight:700
}
.subject>summary::-webkit-details-marker,.paper>summary::-webkit-details-marker{display:none}
.subject>summary{font-size:1.08rem;background:var(--primary-tint);color:var(--ink)}
.subject[open]>summary{border-bottom:1px solid var(--border-strong)}
.chev{margin-left:auto;color:var(--primary-dark);font-size:.9rem}
.paper{border-top:1px solid var(--border)}
.paper:first-child{border-top:0}
.paper>summary{font-size:.98rem;color:var(--ink-soft)}
.badge{background:#fff;border:1px solid var(--border-strong);color:var(--primary-dark);
  border-radius:999px;padding:2px 10px;font-size:.75rem;font-weight:700}
.rows{padding:6px 12px 14px;display:flex;flex-direction:column;gap:8px}
.row{
  display:flex;align-items:center;gap:14px;padding:14px;min-height:60px;
  border:1px solid var(--border);border-radius:var(--radius-sm);background:#fff;color:var(--ink)
}
.row:active{border-color:var(--primary);background:var(--primary-tint)}
.row.highlight{border-color:var(--primary);background:var(--primary-tint)}
.row-num{
  flex:0 0 34px;height:34px;border-radius:10px;background:var(--primary);color:#0F2438;
  display:grid;place-items:center;font-weight:800;font-size:.9rem
}
.row-title{font-weight:600;font-size:.97rem}
.row-sub{display:block;color:var(--ink-soft);font-size:.82rem;font-weight:500}
.row-go{margin-left:auto;color:var(--primary-dark);font-weight:700;white-space:nowrap}
.video-rows{padding:0 12px 12px;display:flex;flex-direction:column;gap:8px}
.chapter-block{border:1px solid var(--border);border-radius:var(--radius-sm);margin:8px 12px;overflow:hidden}
.chapter-block>summary{list-style:none;cursor:pointer;display:flex;align-items:center;gap:12px;
  min-height:60px;padding:12px 14px;font-weight:600}
.chapter-block>summary::-webkit-details-marker{display:none}

/* ---------- Routine / PDF ---------- */
.pdf-frame{width:100%;height:70vh;min-height:420px;border:1px solid var(--border);
  border-radius:var(--radius);background:#fff}
.note{background:var(--secondary);color:#2B3110;border-radius:var(--radius-sm);
  padding:12px 14px;font-size:.9rem;margin-top:14px}

/* ---------- Forms ---------- */
.form-wrap{max-width:440px;margin:34px auto}
.form-card{background:#fff;border:1px solid var(--border);border-radius:22px;
  padding:24px 20px;box-shadow:var(--shadow-lg)}
label{display:block;font-weight:600;font-size:.9rem;margin:14px 0 6px}
input[type=email],input[type=password],input[type=text],textarea{
  width:100%;min-height:50px;padding:13px 14px;font-size:1rem;font-family:inherit;
  border:1px solid var(--border);border-radius:var(--radius-sm);background:#fff;color:var(--ink)
}
textarea{min-height:130px;resize:vertical}
input:focus,textarea:focus{outline:3px solid var(--primary-tint);border-color:var(--primary)}
.form-msg{margin-top:14px;padding:12px 14px;border-radius:var(--radius-sm);font-size:.92rem;display:none}
.form-msg.show{display:block}
.form-msg.ok{background:var(--primary-tint);color:#134564}
.form-msg.err{background:#FFECEC;color:#8C2020}
.form-alt{margin-top:16px;text-align:center;font-size:.94rem;color:var(--ink-soft)}

/* ---------- Footer ---------- */
footer{border-top:1px solid var(--border);background:#fff;padding:24px 0;margin-top:20px}
footer p{margin:0;color:var(--ink-soft);font-size:.88rem}

/* ---------- Tablet (primary target) ---------- */
@media (min-width:640px){
  h1{font-size:2.3rem}
  .hero-card{padding:38px 32px}
  .grid{grid-template-columns:repeat(2,1fr);gap:18px}
  .pdf-frame{height:78vh}
}
/* ---------- Desktop ---------- */
@media (min-width:1024px){
  .nav-toggle{display:none}
  .nav-inner{gap:20px;min-height:76px;flex-wrap:nowrap}
  .nav-menu{display:flex!important;flex-direction:row;align-items:center;width:auto;padding:0;gap:2px;margin-left:8px}
  .nav-link{padding:10px 12px}
  .nav-auth{flex-direction:row;align-items:center;border-top:0;padding-top:0;margin-left:auto}
  .nav-user{padding:0}
  .search{width:280px;padding:0;margin-left:auto;order:3}
  .grid{grid-template-columns:repeat(3,1fr)}
  h1{font-size:2.6rem}
  .hero-card{padding:52px 44px}
}

/* ---------- Auth gate (unclosable login overlay) ---------- */
html.gate-open,html.gate-open body{overflow:hidden}
.gate{position:fixed;inset:0;z-index:9999;display:flex;align-items:center;justify-content:center;padding:16px}
.gate-backdrop{position:absolute;inset:0;background:rgba(15,23,42,.72);backdrop-filter:blur(6px)}
.gate-card{position:relative;z-index:1;width:100%;max-width:420px;max-height:92vh;overflow:auto;
  background:#fff;border:1px solid var(--border);border-radius:18px;padding:26px 22px;
  box-shadow:0 24px 60px rgba(2,6,23,.35)}
.gate-brand{font-weight:800;letter-spacing:-.02em;color:var(--brand,#1d4ed8);margin-bottom:10px}
.gate-card h2{margin:0 0 6px;font-size:1.4rem}
.gate-sub{margin:0 0 18px;color:var(--ink-soft);font-size:.92rem}
.gate-tabs{display:flex;gap:6px;background:#f1f5f9;padding:4px;border-radius:12px;margin-bottom:16px}
.gate-tab{flex:1;padding:11px 10px;border:0;background:transparent;border-radius:9px;font:inherit;
  font-weight:600;color:var(--ink-soft);cursor:pointer;min-height:44px}
.gate-tab.is-active{background:#fff;color:var(--ink);box-shadow:0 1px 3px rgba(2,6,23,.14)}
.gate-card label{display:block;margin:12px 0 6px;font-weight:600;font-size:.9rem}
.gate-card input{width:100%;padding:13px 14px;border:1px solid var(--border);border-radius:11px;font:inherit;min-height:46px}
.gate-card input:focus{outline:2px solid var(--brand,#1d4ed8);outline-offset:1px}