/* =============================================================
   Conceptual Learning — landing page styles
   Palette and layout follow the approved mockup:
   deep-navy hero, purple/pink/orange gradient accents,
   soft lavender cards on light body.
   ============================================================= */

:root{
  --ink:        #0d0a2e;   /* deep navy background */
  --ink-2:      #17114a;   /* lighter navy panel   */
  --purple:     #7c3aed;
  --pink:       #ec4899;
  --orange:     #f97316;
  --mint:       #10b981;
  --sky:        #38bdf8;
  --gold:       #f59e0b;
  --lav:        #ede9fe;
  --paper:      #f5f4fb;
  --card:       #ffffff;
  --text:       #443f6b;
  --text-dark:  #17123d;
  --line:       #e6e3f4;
  --grad:       linear-gradient(90deg,#f97316,#ec4899);
  --grad-purple:linear-gradient(90deg,#7c3aed,#ec4899);
  --radius:     16px;
  --shadow:     0 10px 30px rgba(23,18,61,.08);
  --font-head:  'Poppins',system-ui,sans-serif;
  --font-body:  'Inter',system-ui,sans-serif;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--font-body);color:var(--text);background:var(--paper);line-height:1.6;font-size:16px}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
h1,h2,h3,h4{font-family:var(--font-head);color:var(--text-dark);line-height:1.2}
.wrap{max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:64px 0}
.section-title{font-size:clamp(24px,3vw,32px);font-weight:700;margin-bottom:8px}
.section-sub{color:var(--text);margin-bottom:32px;max-width:640px}

/* Buttons */
.btn{display:inline-flex;align-items:center;gap:8px;font-family:var(--font-head);font-weight:600;font-size:15px;padding:13px 26px;border-radius:999px;border:0;cursor:pointer;transition:transform .15s ease,box-shadow .15s ease}
.btn:hover{transform:translateY(-2px)}
.btn-grad{background:var(--grad);color:#fff;box-shadow:0 8px 20px rgba(236,72,153,.35)}
.btn-outline{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.4)}
.btn-outline:hover{border-color:#fff}
.btn-purple{background:var(--grad-purple);color:#fff;box-shadow:0 8px 20px rgba(124,58,237,.35)}
.btn:focus-visible{outline:3px solid var(--sky);outline-offset:2px}

/* =================== NAV =================== */
.site-header{background:var(--ink);position:sticky;top:0;z-index:50;border-bottom:1px solid rgba(255,255,255,.06)}
.nav{display:flex;align-items:center;gap:24px;height:72px}
.logo{display:flex;align-items:center;gap:10px;color:#fff;font-family:var(--font-head)}
.logo-mark{width:44px;height:44px;border-radius:10px;background:var(--grad-purple);display:grid;place-items:center;font-weight:800;font-size:20px;color:#fff}
.logo-name{font-weight:700;font-size:17px;line-height:1.1}
.logo-tag{font-size:10.5px;color:#b9b3e6;font-weight:500}
.nav-links{display:flex;gap:26px;list-style:none;margin-left:16px}
.nav-links a{color:#cfc9f2;font-size:14.5px;font-weight:500}
.nav-links a:hover,.nav-links a.active{color:#fff}
.nav-links a.active{border-bottom:2px solid var(--orange);padding-bottom:4px}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:14px}
.nav-phone{color:#fff;font-size:13.5px;line-height:1.3;text-align:right}
.nav-phone small{color:#b9b3e6;display:block;font-size:11px}
.btn-login{background:transparent;border:1.5px solid rgba(255,255,255,.35);color:#fff;padding:10px 18px;font-size:13.5px}
.btn-demo{background:var(--grad);color:#fff;padding:10px 20px;font-size:13.5px}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;width:40px;height:40px}
.nav-toggle span{display:block;width:22px;height:2px;background:#fff;margin:5px auto;transition:.2s}

/* =================== HERO =================== */
.hero{background:radial-gradient(1200px 600px at 80% 10%,#2a1b6e 0%,var(--ink) 55%);color:#fff;padding:64px 0 80px;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.hero-eyebrow{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.15);border-radius:999px;padding:7px 16px;font-size:13px;color:#e6e1ff;margin-bottom:22px}
.hero h1{color:#fff;font-size:clamp(34px,4.6vw,56px);font-weight:800;letter-spacing:-.5px}
.hero h1 .accent{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{color:#c9c3ee;margin:18px 0 26px;max-width:480px;font-size:16.5px}
.hero-chips{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:28px}
.chip{display:inline-flex;align-items:center;gap:7px;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.14);border-radius:999px;padding:8px 15px;font-size:13px;color:#e6e1ff}
.chip .dot{width:8px;height:8px;border-radius:50%}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:26px}
.hero-trust{display:flex;align-items:center;gap:12px;font-size:13.5px;color:#c9c3ee}
.avatars{display:flex}
.avatars span{width:34px;height:34px;border-radius:50%;border:2px solid var(--ink);margin-left:-8px;background:var(--grad-purple);display:grid;place-items:center;font-size:12px;font-weight:700;color:#fff}
.avatars span:first-child{margin-left:0}

/* Hero video + AI card */
.hero-media{position:relative}
.hero-glow{position:absolute;inset:-30px -20px;background:radial-gradient(closest-side,rgba(124,58,237,.35),transparent 70%);z-index:0;border-radius:50%}
.hero-media .video-frame{position:relative;z-index:1;border:1px solid rgba(255,255,255,.15);box-shadow:0 30px 60px rgba(0,0,0,.45)}
.ai-card{position:absolute;right:-8px;bottom:-34px;z-index:2;background:rgba(20,15,58,.92);backdrop-filter:blur(6px);border:1px solid rgba(255,255,255,.14);border-radius:14px;padding:16px 18px;width:230px;box-shadow:0 18px 40px rgba(0,0,0,.45)}
.ai-card h4{color:#fff;font-size:14px;margin-bottom:10px;display:flex;gap:8px;align-items:center}
.ai-card ul{list-style:none}
.ai-card li{font-size:12.5px;color:#cfc9f2;padding:4px 0;display:flex;gap:8px;align-items:center}
.ai-card li::before{content:"✓";color:var(--mint);font-weight:700}

/* Video frame — any iframe pasted in auto-fits 16:9 */
.video-frame{position:relative;width:100%;aspect-ratio:16/9;border-radius:18px;overflow:hidden;background:linear-gradient(135deg,#241a63,#0d0a2e)}
.video-frame iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.video-placeholder{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;color:#e6e1ff}
.play-btn{width:64px;height:64px;border-radius:50%;background:var(--grad);position:relative;box-shadow:0 10px 30px rgba(236,72,153,.5)}
.play-btn::after{content:"";position:absolute;left:55%;top:50%;transform:translate(-50%,-50%);border-left:18px solid #fff;border-top:11px solid transparent;border-bottom:11px solid transparent}
.video-label{font-family:var(--font-head);font-weight:600;font-size:16px}
.video-hint{font-size:12.5px;color:#a49cd8}

/* =================== STATS BAR =================== */
.stats{margin-top:-34px;position:relative;z-index:5}
.stats-card{background:var(--card);border-radius:20px;box-shadow:var(--shadow);display:grid;grid-template-columns:repeat(5,1fr);padding:26px 10px}
.stat{display:flex;align-items:center;gap:12px;justify-content:center;padding:6px 12px;border-right:1px solid var(--line)}
.stat:last-child{border-right:0}
.stat-icon{width:46px;height:46px;border-radius:14px;display:grid;place-items:center;font-size:20px;flex:none}
.stat b{display:block;font-family:var(--font-head);font-size:20px;color:var(--text-dark);line-height:1.15}
.stat small{font-size:12.5px;color:var(--text)}

/* =================== TWO-COLUMN: METHOD + NOTES =================== */
.grid-2{display:grid;grid-template-columns:1fr 1.1fr;gap:28px;align-items:stretch}
.panel{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);padding:32px}
.panel h3{font-size:21px;margin-bottom:6px}
.panel .muted{font-size:14px;margin-bottom:22px;color:var(--text)}
.method-flow{display:grid;grid-template-columns:repeat(4,1fr);gap:18px 8px}
.step{display:flex;flex-direction:column;align-items:center;text-align:center;gap:8px;position:relative}
.step-icon{width:56px;height:56px;border-radius:50%;display:grid;place-items:center;font-size:22px}
.step small{font-size:12px;font-weight:600;color:var(--text-dark);line-height:1.3}
.step:not(:nth-child(4n))::after{content:"→";position:absolute;right:-10px;top:20px;color:#c4bde8;font-size:14px}

.notes-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.note-card{border:1.5px solid var(--line);border-radius:14px;padding:16px;background:#fbfaff}
.note-card h4{font-size:13.5px;margin-bottom:10px;color:var(--purple)}
.note-card p,.note-card li{font-size:12.5px;line-height:1.55}
.note-card ul{list-style:none}
.note-card li{padding:3px 0;display:flex;gap:7px;align-items:flex-start}
.note-card li::before{content:"●";font-size:8px;margin-top:6px;color:var(--mint)}
.note-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px;padding-top:16px;border-top:1px solid var(--line)}
.note-tags span{font-size:12.5px;font-weight:600;color:var(--text-dark);display:inline-flex;align-items:center;gap:6px}

/* =================== ANIMATIONS + WEEKLY TESTS =================== */
.grid-anim{display:grid;grid-template-columns:.9fr 1.1fr;gap:28px}
.subject-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.subject-tags span{background:var(--lav);color:var(--purple);border-radius:999px;padding:6px 14px;font-size:12.5px;font-weight:600}
.test-flow{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}
.test-card{border:1.5px solid var(--line);border-radius:14px;padding:16px 12px;text-align:center;background:#fbfaff;position:relative}
.test-card h4{font-size:13.5px;margin-bottom:6px}
.test-card p{font-size:11.5px;line-height:1.45}
.test-card .big{font-family:var(--font-head);font-size:22px;font-weight:700;color:var(--mint);margin:8px 0}
.test-card.dark{background:var(--ink-2);border-color:var(--ink-2)}
.test-card.dark h4{color:#fff}
.test-card.dark p{color:#c9c3ee}
.test-card.dark .big{color:#4ade80}

/* =================== AI ASSISTANT BAND =================== */
.ai-band{background:linear-gradient(120deg,#1b1250,#0d0a2e);border-radius:24px;color:#fff;padding:44px 40px;display:grid;grid-template-columns:.9fr 2.1fr;gap:36px;align-items:center}
.ai-band h2{color:#fff;font-size:clamp(22px,2.6vw,30px);margin-bottom:12px}
.ai-band p{color:#c9c3ee;font-size:14.5px;margin-bottom:22px}
.ai-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.ai-step{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);border-radius:14px;padding:18px 14px;text-align:center}
.ai-step .emoji{font-size:26px;display:block;margin-bottom:8px}
.ai-step b{color:#fff;font-size:13px;display:block;margin-bottom:4px}
.ai-step small{font-size:11.5px;color:#b9b3e6;line-height:1.4;display:block}
.ai-step .score{font-family:var(--font-head);font-size:24px;font-weight:700;color:#4ade80}
.stars{color:var(--gold);letter-spacing:2px;font-size:13px}

/* =================== RESULTS + TESTIMONIALS =================== */
.grid-results{display:grid;grid-template-columns:1.15fr .85fr;gap:28px}
.result-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.result-card{border:1.5px solid var(--line);border-radius:14px;padding:16px;background:#fbfaff;text-align:center}
.result-avatar{width:52px;height:52px;border-radius:50%;margin:0 auto 10px;background:var(--grad-purple);display:grid;place-items:center;color:#fff;font-weight:700;font-family:var(--font-head);font-size:17px}
.result-card h4{font-size:14px}
.result-card .school{font-size:11.5px;color:var(--text);margin-bottom:12px}
.ba{display:flex;justify-content:center;gap:14px;font-size:12px}
.ba b{display:block;font-family:var(--font-head);font-size:16px;color:var(--text-dark)}
.ba .gain b{color:var(--mint)}
.quote-card{border:1.5px solid var(--line);border-radius:14px;padding:20px;background:#fbfaff;margin-bottom:14px}
.quote-card p{font-size:13.5px;font-style:italic;margin-bottom:12px}
.quote-who{display:flex;align-items:center;gap:10px;font-size:12.5px}
.quote-who .who-avatar{width:38px;height:38px;border-radius:50%;background:var(--grad);display:grid;place-items:center;color:#fff;font-weight:700;flex:none}
.quote-who b{display:block;color:var(--text-dark)}

/* =================== FEATURE STRIP =================== */
.feature-strip{background:var(--card);border-radius:20px;box-shadow:var(--shadow);display:grid;grid-template-columns:repeat(8,1fr);padding:26px 14px;gap:8px}
.feature{display:flex;flex-direction:column;align-items:center;gap:9px;text-align:center}
.feature .f-icon{width:46px;height:46px;border-radius:13px;display:grid;place-items:center;font-size:20px}
.feature small{font-size:11.5px;font-weight:600;color:var(--text-dark);line-height:1.35}

/* =================== CTA BAND =================== */
.cta-band{background:radial-gradient(900px 400px at 15% 20%,#2a1b6e 0%,var(--ink) 60%);border-radius:28px;color:#fff;padding:52px 44px;display:grid;grid-template-columns:1.1fr .9fr;gap:36px;align-items:center;overflow:hidden;position:relative}
.cta-band h2{color:#fff;font-size:clamp(24px,3vw,36px);margin-bottom:18px}
.cta-points{list-style:none}
.cta-points li{padding:5px 0;color:#d8d3f5;font-size:14.5px;display:flex;gap:9px;align-items:center}
.cta-points li::before{content:"✓";color:var(--mint);font-weight:700}
.cta-box{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);border-radius:20px;padding:30px;text-align:center}
.cta-box h3{color:#fff;font-size:19px;margin-bottom:8px}
.cta-box p{color:#c9c3ee;font-size:13.5px;margin-bottom:20px}

/* =================== FOOTER =================== */
.site-footer{background:var(--ink);color:#b9b3e6;margin-top:64px;padding:48px 0 24px;font-size:13.5px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr 1.3fr;gap:28px;padding-bottom:32px;border-bottom:1px solid rgba(255,255,255,.08)}
.site-footer h4{color:#fff;font-size:14px;margin-bottom:14px}
.site-footer ul{list-style:none}
.site-footer li{padding:4px 0}
.site-footer a:hover{color:#fff}
.newsletter{display:flex;gap:8px;margin-top:12px}
.newsletter input{flex:1;border-radius:999px;border:1px solid rgba(255,255,255,.2);background:rgba(255,255,255,.06);padding:11px 16px;color:#fff;font-size:13px}
.newsletter input::placeholder{color:#8c85c4}
.newsletter button{border-radius:999px;border:0;background:var(--grad);color:#fff;padding:11px 18px;font-weight:600;cursor:pointer}
.footer-bottom{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;padding-top:20px;font-size:12.5px;color:#8c85c4}

/* Icon colour helpers */
.bg-purple{background:var(--lav);color:var(--purple)}
.bg-pink{background:#fce7f3;color:var(--pink)}
.bg-orange{background:#ffedd5;color:var(--orange)}
.bg-mint{background:#d1fae5;color:#059669}
.bg-sky{background:#e0f2fe;color:#0284c7}
.bg-gold{background:#fef3c7;color:#b45309}
.dot-orange{background:var(--orange)}
.dot-sky{background:var(--sky)}
.dot-purple{background:#a78bfa}
.dot-gold{background:var(--gold)}

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

/* =================== RESPONSIVE =================== */
@media (max-width:1024px){
  .hero-grid{grid-template-columns:1fr;gap:56px}
  .hero-media{max-width:640px}
  .stats-card{grid-template-columns:repeat(3,1fr);gap:14px}
  .stat{border-right:0}
  .grid-2,.grid-anim,.grid-results{grid-template-columns:1fr}
  .ai-band{grid-template-columns:1fr}
  .ai-steps{grid-template-columns:repeat(2,1fr)}
  .test-flow{grid-template-columns:repeat(3,1fr)}
  .feature-strip{grid-template-columns:repeat(4,1fr);gap:18px}
  .footer-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:720px){
  .nav-links,.nav-phone,.btn-login{display:none}
  .nav-toggle{display:block;margin-left:auto}
  .nav-right{margin-left:0}
  .site-header .nav{gap:12px}
  .nav-links.open{display:flex;position:absolute;top:72px;left:0;right:0;background:var(--ink);flex-direction:column;padding:18px 24px;gap:14px;border-bottom:1px solid rgba(255,255,255,.1)}
  .stats-card{grid-template-columns:repeat(2,1fr)}
  .method-flow{grid-template-columns:repeat(2,1fr)}
  .step:not(:nth-child(4n))::after{display:none}
  .notes-grid{grid-template-columns:1fr}
  .test-flow{grid-template-columns:repeat(2,1fr)}
  .result-cards{grid-template-columns:1fr}
  .feature-strip{grid-template-columns:repeat(2,1fr)}
  .cta-band{grid-template-columns:1fr;padding:36px 24px}
  .ai-band{padding:32px 22px}
  .ai-steps{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr}
  .ai-card{position:static;width:100%;margin-top:14px}
}