/* =========================================================
   EduShine AI — Design tokens
   Palette: Ink Indigo #16213E, Deep Indigo #1F3164, Shine Gold #D6A331,
            Paper #F6F5F1, Slate #5B6478, Success #1F7A5C, Danger #B3432B
   Type: "Fraunces" (display) + "Inter" (body/UI)
   Signature: the "sunrise arc" — a rising gold arc used as a progress/
   divider motif across hero, section breaks, and the mock-test palette.
   ========================================================= */

:root{
  --ink: #16213E;
  --indigo: #1F3164;
  --indigo-soft: #2C4381;
  --gold: #D6A331;
  --gold-soft: #F1D89B;
  --paper: #F6F5F1;
  --paper-dim: #ECE9E1;
  --card: #FFFFFF;
  --slate: #5B6478;
  --slate-light: #8890A0;
  --success: #1F7A5C;
  --danger: #B3432B;
  --line: #E1DED3;
  --radius: 14px;
  --radius-sm: 8px;
  --shadow: 0 6px 24px rgba(22,33,62,0.08);
  --shadow-lg: 0 16px 48px rgba(22,33,62,0.14);
  --maxw: 1180px;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:'Inter',system-ui,sans-serif;
  color:var(--ink);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
  line-height:1.55;
}
h1,h2,h3,h4{
  font-family:'Fraunces',Georgia,serif;
  font-weight:600;
  line-height:1.15;
  margin:0 0 .5em;
  color:var(--ink);
}
p{margin:0 0 1em;color:var(--slate);}
a{color:inherit;text-decoration:none;}
img{max-width:100%;display:block;}
button{font-family:inherit;cursor:pointer;}
:focus-visible{outline:3px solid var(--gold);outline-offset:2px;}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:.78rem;letter-spacing:.08em;text-transform:uppercase;
  color:var(--indigo);font-weight:700;margin-bottom:14px;
}
.eyebrow::before{content:"";width:18px;height:2px;background:var(--gold);display:inline-block;}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 24px;border-radius:999px;font-weight:600;font-size:.95rem;
  border:2px solid transparent;transition:transform .15s ease, box-shadow .15s ease, background .15s ease;
  white-space:nowrap;
}
.btn:active{transform:translateY(1px);}
.btn-primary{background:var(--indigo);color:#fff;}
.btn-primary:hover{background:var(--ink);box-shadow:var(--shadow);}
.btn-gold{background:var(--gold);color:var(--ink);}
.btn-gold:hover{background:#c6952a;box-shadow:var(--shadow);}
.btn-outline{background:transparent;border-color:var(--indigo);color:var(--indigo);}
.btn-outline:hover{background:var(--indigo);color:#fff;}
.btn-ghost{background:transparent;color:var(--indigo);border-color:var(--line);}
.btn-ghost:hover{border-color:var(--indigo);}
.btn-sm{padding:9px 16px;font-size:.85rem;}
.btn-block{width:100%;}
.btn:disabled{opacity:.5;cursor:not-allowed;}

/* ---------- Nav ---------- */
.site-header{
  position:sticky;top:0;z-index:100;background:rgba(246,245,241,.92);
  backdrop-filter:blur(8px);border-bottom:1px solid var(--line);
}
.nav{display:flex;align-items:center;justify-content:space-between;padding:14px 24px;max-width:var(--maxw);margin:0 auto;gap:16px;}
.brand{display:flex;align-items:center;gap:10px;font-family:'Fraunces',serif;font-weight:700;font-size:1.25rem;color:var(--ink);}
.brand .mark{
  width:34px;height:34px;border-radius:50%;
  background:conic-gradient(from 220deg, var(--gold), var(--gold-soft), var(--indigo) 70%, var(--indigo));
  position:relative;flex-shrink:0;
}
.brand .mark::after{content:"";position:absolute;inset:6px;background:var(--paper);border-radius:50%;}
.nav-links{display:flex;gap:22px;list-style:none;margin:0;padding:0;flex-wrap:wrap;}
.nav-links a{font-size:.92rem;font-weight:500;color:var(--ink);padding:6px 2px;border-bottom:2px solid transparent;}
.nav-links a:hover,.nav-links a.active{border-color:var(--gold);}
.nav-actions{display:flex;align-items:center;gap:10px;}
.nav-search{display:flex;align-items:center;background:#fff;border:1px solid var(--line);border-radius:999px;padding:6px 12px;gap:6px;min-width:170px;}
.nav-search input{border:none;outline:none;background:transparent;font-size:.85rem;width:100%;color:var(--ink);}
.hamburger{display:none;background:none;border:none;font-size:1.5rem;color:var(--ink);}
.mobile-panel{display:none;flex-direction:column;gap:14px;padding:16px 24px 22px;border-top:1px solid var(--line);background:var(--paper);}
.mobile-panel.open{display:flex;}
@media (max-width:920px){
  .nav-links,.nav-search{display:none;}
  .hamburger{display:block;}
}

/* ---------- Hero (sunrise-arc signature) ---------- */
.hero{position:relative;overflow:hidden;padding:96px 0 72px;background:var(--ink);color:#fff;}
.hero::before{
  content:"";position:absolute;left:50%;bottom:-40%;width:1400px;height:1400px;
  transform:translateX(-50%);border-radius:50%;
  background:radial-gradient(circle at 50% 30%, rgba(214,163,49,.35), rgba(214,163,49,0) 60%);
}
.hero-arc{position:absolute;left:50%;bottom:-260px;width:900px;height:900px;transform:translateX(-50%);
  border:2px solid rgba(214,163,49,.35);border-radius:50%;}
.hero-arc.two{width:1200px;height:1200px;bottom:-360px;border-color:rgba(214,163,49,.18);}
.hero-inner{position:relative;z-index:2;max-width:760px;margin:0 auto;text-align:center;}
.hero h1{color:#fff;font-size:clamp(2.2rem,5vw,3.4rem);}
.hero p.lead{color:#D8DCEA;font-size:1.15rem;max-width:600px;margin:0 auto 30px;}
.hero-ctas{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;}

/* ---------- Sections ---------- */
section{padding:72px 0;}
.section-head{max-width:640px;margin:0 auto 40px;text-align:center;}
.section-head.left{margin:0 0 36px;text-align:left;}
.divider-arc{width:100%;height:1px;background:linear-gradient(90deg, transparent, var(--gold), transparent);margin:0 auto;max-width:240px;}

/* ---------- Cards / Grid ---------- */
.grid{display:grid;gap:22px;}
.grid-4{grid-template-columns:repeat(4,1fr);}
.grid-3{grid-template-columns:repeat(3,1fr);}
.grid-2{grid-template-columns:repeat(2,1fr);}
@media (max-width:960px){.grid-4{grid-template-columns:repeat(2,1fr);}.grid-3{grid-template-columns:repeat(2,1fr);}}
@media (max-width:640px){.grid-4,.grid-3,.grid-2{grid-template-columns:1fr;}}

.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px;transition:transform .15s ease, box-shadow .15s ease;
}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow);}
.card .icon{font-size:1.7rem;margin-bottom:14px;display:inline-block;}
.card h3{font-size:1.08rem;margin-bottom:8px;}
.card p{font-size:.92rem;margin-bottom:16px;}
.card a.card-cta{font-weight:600;color:var(--indigo);font-size:.88rem;}
.card a.card-cta::after{content:" →";}

/* ---------- Forms / selects ---------- */
label{display:block;font-size:.82rem;font-weight:600;color:var(--ink);margin-bottom:6px;}
select,input[type=text],input[type=number],input[type=email],input[type=password],textarea{
  width:100%;padding:11px 14px;border-radius:var(--radius-sm);border:1px solid var(--line);
  background:#fff;font-family:inherit;font-size:.92rem;color:var(--ink);
}
select:focus,input:focus,textarea:focus{border-color:var(--indigo);}
.field{margin-bottom:16px;}
.field-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:14px;}
.helper-text{font-size:.78rem;color:var(--slate-light);margin-top:4px;}
.validation-msg{font-size:.85rem;color:var(--danger);margin-top:10px;font-weight:600;display:none;}
.validation-msg.show{display:block;}

/* ---------- Disclaimer component ---------- */
.ai-disclaimer{
  display:flex;gap:10px;align-items:flex-start;background:#FBF3E1;border:1px solid var(--gold-soft);
  border-radius:var(--radius-sm);padding:12px 14px;font-size:.82rem;color:#6B531A;margin-top:14px;
}
.ai-disclaimer .warn{font-size:1rem;line-height:1;}
.ai-label{
  display:inline-block;font-size:.68rem;font-weight:700;letter-spacing:.04em;text-transform:uppercase;
  padding:3px 9px;border-radius:999px;background:var(--gold-soft);color:#5C4715;margin-bottom:8px;
}
.verified-label{
  display:inline-block;font-size:.68rem;font-weight:700;letter-spacing:.04em;text-transform:uppercase;
  padding:3px 9px;border-radius:999px;background:#DCEFE7;color:var(--success);margin-bottom:8px;
}

/* ---------- AI Tutor ---------- */
.tutor-layout{display:grid;grid-template-columns:280px 1fr;gap:24px;}
@media (max-width:860px){.tutor-layout{grid-template-columns:1fr;}}
.tutor-panel{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px;height:fit-content;}
.tutor-panel h4{font-size:.9rem;text-transform:uppercase;letter-spacing:.05em;color:var(--slate);margin-bottom:14px;}
.mode-pills{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:18px;}
.pill{padding:7px 13px;border-radius:999px;border:1px solid var(--line);font-size:.82rem;background:#fff;color:var(--slate);}
.pill.active{background:var(--indigo);color:#fff;border-color:var(--indigo);}
.chat-window{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);display:flex;flex-direction:column;min-height:520px;}
.chat-messages{flex:1;padding:22px;overflow-y:auto;display:flex;flex-direction:column;gap:16px;max-height:60vh;}
.msg{max-width:82%;padding:13px 16px;border-radius:14px;font-size:.92rem;}
.msg.user{align-self:flex-end;background:var(--indigo);color:#fff;border-bottom-right-radius:4px;}
.msg.ai{align-self:flex-start;background:var(--paper-dim);border-bottom-left-radius:4px;}
.msg-actions{display:flex;gap:10px;margin-top:8px;}
.msg-actions button{background:none;border:none;font-size:.75rem;color:var(--slate);font-weight:600;}
.msg-actions button:hover{color:var(--indigo);}
.typing{align-self:flex-start;color:var(--slate-light);font-size:.85rem;font-style:italic;}
.chat-input-row{display:flex;gap:10px;padding:16px;border-top:1px solid var(--line);}
.chat-input-row textarea{resize:none;height:52px;}
.suggested-qs{display:flex;flex-wrap:wrap;gap:8px;padding:0 16px 16px;}
.suggested-qs button{background:var(--paper-dim);border:1px solid var(--line);border-radius:999px;padding:7px 13px;font-size:.8rem;color:var(--ink);}

/* ---------- Mock Test ---------- */
.mt-layout{display:grid;grid-template-columns:1fr 260px;gap:24px;}
@media (max-width:900px){.mt-layout{grid-template-columns:1fr;}}
.mt-question-box{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:28px;}
.mt-meta{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px;flex-wrap:wrap;gap:10px;}
.mt-timer{font-family:'Fraunces',serif;font-weight:700;font-size:1.3rem;color:var(--indigo);}
.mt-options{display:flex;flex-direction:column;gap:10px;margin:20px 0;}
.mt-option{display:flex;gap:12px;align-items:flex-start;padding:14px 16px;border:1px solid var(--line);border-radius:var(--radius-sm);background:#fff;}
.mt-option:hover{border-color:var(--indigo);}
.mt-option.selected{border-color:var(--indigo);background:#EEF1FA;}
.mt-option.correct{border-color:var(--success);background:#EAF6F0;}
.mt-option.incorrect{border-color:var(--danger);background:#FBEAE4;}
.mt-nav-row{display:flex;justify-content:space-between;gap:10px;margin-top:22px;flex-wrap:wrap;}
.palette{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px;height:fit-content;}
.palette-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:6px;margin:12px 0;}
.palette-grid button{aspect-ratio:1;border-radius:6px;border:1px solid var(--line);background:#fff;font-size:.78rem;color:var(--slate);}
.palette-grid button.answered{background:var(--success);color:#fff;border-color:var(--success);}
.palette-grid button.marked{background:var(--gold);color:var(--ink);border-color:var(--gold);}
.palette-grid button.current{outline:2px solid var(--indigo);outline-offset:1px;}
.legend{display:flex;flex-direction:column;gap:6px;font-size:.78rem;color:var(--slate);margin-top:10px;}
.legend span{display:inline-flex;align-items:center;gap:6px;}
.dot{width:10px;height:10px;border-radius:3px;display:inline-block;}
.result-summary{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin:24px 0;}
@media (max-width:700px){.result-summary{grid-template-columns:repeat(2,1fr);}}
.stat-box{background:var(--card);border:1px solid var(--line);border-radius:var(--radius-sm);padding:16px;text-align:center;}
.stat-box .num{font-family:'Fraunces',serif;font-size:1.6rem;font-weight:700;color:var(--indigo);}
.stat-box .lbl{font-size:.78rem;color:var(--slate);text-transform:uppercase;letter-spacing:.03em;}

/* ---------- Pricing ---------- */
.price-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:32px 26px;position:relative;}
.price-card.featured{border-color:var(--gold);box-shadow:var(--shadow);}
.price-tag{position:absolute;top:-12px;right:24px;background:var(--gold);color:var(--ink);font-size:.72rem;font-weight:700;padding:4px 12px;border-radius:999px;}
.price-amount{font-family:'Fraunces',serif;font-size:2.2rem;font-weight:700;margin:14px 0 4px;}
.price-list{list-style:none;padding:0;margin:20px 0;display:flex;flex-direction:column;gap:10px;font-size:.88rem;color:var(--slate);}
.price-list li::before{content:"✓ ";color:var(--success);font-weight:700;}
.toggle-row{display:flex;justify-content:center;align-items:center;gap:12px;margin-bottom:36px;}
.toggle-switch{width:52px;height:28px;background:var(--line);border-radius:999px;position:relative;border:none;}
.toggle-switch::after{content:"";position:absolute;top:3px;left:3px;width:22px;height:22px;border-radius:50%;background:#fff;transition:.2s;}
.toggle-switch.on{background:var(--indigo);}
.toggle-switch.on::after{left:27px;}

/* ---------- Dashboard ---------- */
.dash-grid{display:grid;grid-template-columns:2fr 1fr;gap:24px;}
@media (max-width:900px){.dash-grid{grid-template-columns:1fr;}}
.dash-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:28px;}
@media (max-width:700px){.dash-stats{grid-template-columns:repeat(2,1fr);}}
.list-row{display:flex;justify-content:space-between;align-items:center;padding:13px 0;border-bottom:1px solid var(--line);font-size:.9rem;}
.list-row:last-child{border-bottom:none;}
.tag{font-size:.72rem;padding:3px 10px;border-radius:999px;background:var(--paper-dim);color:var(--slate);font-weight:600;}

/* ---------- Article / listing rows ---------- */
.article-row{display:flex;gap:18px;padding:18px 0;border-bottom:1px solid var(--line);}
.article-row:last-child{border-bottom:none;}
.article-row .date{font-size:.75rem;color:var(--slate-light);text-transform:uppercase;letter-spacing:.04em;}
.filter-bar{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:28px;}
.chip{padding:8px 15px;border-radius:999px;border:1px solid var(--line);font-size:.82rem;background:#fff;color:var(--slate);}
.chip.active{background:var(--ink);color:#fff;border-color:var(--ink);}

/* ---------- Empty / error states ---------- */
.empty-state{text-align:center;padding:60px 20px;color:var(--slate);}
.empty-state .icon{font-size:2.4rem;margin-bottom:14px;}

/* ---------- Footer ---------- */
footer{background:var(--ink);color:#C6CBDA;padding:52px 0 28px;margin-top:60px;}
.footer-grid{display:grid;grid-template-columns:2fr repeat(3,1fr);gap:32px;margin-bottom:40px;}
@media (max-width:760px){.footer-grid{grid-template-columns:1fr 1fr;}}
footer h5{color:#fff;font-size:.85rem;text-transform:uppercase;letter-spacing:.05em;margin-bottom:14px;font-family:'Inter';font-weight:700;}
footer ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:9px;font-size:.87rem;}
footer a:hover{color:var(--gold);}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding-top:22px;font-size:.8rem;color:#8892A6;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;}

/* ---------- Utility ---------- */
.text-center{text-align:center;}
.mt-0{margin-top:0;}
.hidden{display:none !important;}
.badge-row{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:10px;}
.skip-link{position:absolute;left:-999px;top:0;background:var(--ink);color:#fff;padding:10px 16px;z-index:200;}
.skip-link:focus{left:12px;top:12px;}