:root{
  --bg:#07111f; --bg2:#0b1830; --card:rgba(255,255,255,.075); --card2:rgba(255,255,255,.105);
  --text:#f8fafc; --muted:#b6c2d2; --line:rgba(255,255,255,.16); --green:#22c55e; --teal:#14b8a6; --cyan:#06b6d4; --blue:#38bdf8; --purple:#a855f7; --gold:#facc15; --danger:#fb7185;
  --shadow:0 28px 90px rgba(0,0,0,.38); --radius:28px; --max:1180px;
  font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans Devanagari","Noto Sans Bengali","Noto Naskh Arabic","Noto Sans",Arial,sans-serif;
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);line-height:1.72;overflow-x:hidden}a{color:inherit;text-decoration:none}p{margin:0;color:var(--muted)}button,input{font:inherit}.page-bg{position:fixed;inset:0;z-index:-1;background:radial-gradient(circle at 14% 8%,rgba(34,197,94,.24),transparent 28%),radial-gradient(circle at 86% 16%,rgba(6,182,212,.22),transparent 30%),radial-gradient(circle at 50% 95%,rgba(168,85,247,.22),transparent 34%),linear-gradient(135deg,#07111f,#091a32 55%,#06101f)}.page-bg:after{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);background-size:42px 42px;mask-image:linear-gradient(to bottom,rgba(0,0,0,.95),rgba(0,0,0,.25))}
.topbar{position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;gap:18px;padding:14px max(18px,calc((100vw - var(--max))/2));background:rgba(7,17,31,.78);backdrop-filter:blur(18px);border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:12px;font-weight:900;letter-spacing:.2px}.brand-mark{display:grid;place-items:center;width:46px;height:46px;border-radius:16px;background:linear-gradient(135deg,var(--green),var(--cyan),var(--purple));box-shadow:0 14px 34px rgba(6,182,212,.25);color:#fff;font-weight:950}.toplinks{display:flex;gap:8px;flex-wrap:wrap}.toplinks a{padding:9px 13px;border:1px solid transparent;border-radius:999px;color:var(--muted);font-weight:750}.toplinks a:hover{border-color:var(--line);background:rgba(255,255,255,.07);color:#fff}
main{width:min(var(--max),calc(100% - 28px));margin:0 auto 70px}.hero{display:grid;grid-template-columns:1.02fr .9fr;gap:36px;align-items:center;min-height:calc(100vh - 82px);padding:58px 0 34px}.compact-hero{min-height:auto}.hero-copy{padding:34px;border:1px solid var(--line);border-radius:calc(var(--radius) + 12px);background:linear-gradient(135deg,rgba(255,255,255,.11),rgba(255,255,255,.035));box-shadow:var(--shadow)}.eyebrow{display:inline-flex;align-items:center;gap:8px;padding:8px 13px;border-radius:999px;border:1px solid rgba(34,197,94,.34);background:rgba(34,197,94,.1);color:#bbf7d0;font-weight:850;margin-bottom:18px}.hero h1{font-size:clamp(2.1rem,5vw,5.25rem);line-height:1.02;margin:0 0 18px;letter-spacing:-.055em}.hero p{font-size:clamp(1rem,2vw,1.26rem)}.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:28px}.primary-btn,.ghost-btn,.listen-btn,.stop-btn,.goto-form button{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:13px 18px;border-radius:16px;font-weight:900;border:0;cursor:pointer}.primary-btn{background:linear-gradient(135deg,var(--green),var(--cyan));color:#032018;box-shadow:0 18px 42px rgba(34,197,94,.25)}.ghost-btn{border:1px solid var(--line);background:rgba(255,255,255,.07);color:#fff}.hero-visual{min-height:420px;display:grid;place-items:center;border:1px solid var(--line);border-radius:calc(var(--radius) + 14px);background:rgba(255,255,255,.055);box-shadow:var(--shadow);overflow:hidden}.hero-visual svg{width:min(100%,620px);height:auto;filter:drop-shadow(0 20px 45px rgba(6,182,212,.18))}.mini-visual{min-height:340px}
.audio-tools{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}.listen-btn{background:#0f766e;color:#ecfeff}.stop-btn{background:rgba(255,255,255,.07);border:1px solid var(--line);color:#fff}.block-audio{display:flex;align-items:center;justify-content:flex-end;gap:8px;flex-wrap:wrap}.mini-listen-btn,.mini-stop-btn,.audio-dock button{min-height:38px;padding:8px 11px;border-radius:14px;border:1px solid rgba(255,255,255,.14);font-weight:900;cursor:pointer}.mini-listen-btn{background:linear-gradient(135deg,var(--green),var(--cyan));color:#041019}.mini-stop-btn{background:rgba(255,255,255,.08);color:#fff}.mini-listen-btn.is-speaking,.listen-btn.is-speaking{background:linear-gradient(135deg,#fb7185,#f59e0b);color:#111827}.audio-dock{position:fixed;right:16px;bottom:86px;z-index:40;display:flex;align-items:center;gap:10px;max-width:calc(100% - 32px);padding:10px 12px;border-radius:18px;background:rgba(7,17,31,.92);border:1px solid rgba(255,255,255,.2);box-shadow:0 20px 50px rgba(0,0,0,.36);backdrop-filter:blur(16px)}.audio-dock[hidden]{display:none}.audio-dock span{font-weight:900;color:#d1fae5}.audio-dock button{background:#fff;color:#0f172a}.point-head,.section-title-with-audio,.section-audio-row{display:flex;align-items:flex-start;justify-content:space-between;gap:16px}.section-audio-row{margin-bottom:8px}.section-title-with-audio{margin-bottom:10px}
.goto-form{display:grid;grid-template-columns:auto 100px auto;align-items:center;gap:10px;margin-top:18px;padding:12px;border:1px solid var(--line);border-radius:18px;background:rgba(255,255,255,.06)}.goto-form label{font-weight:900}.goto-form input{height:44px;border:1px solid var(--line);border-radius:12px;padding:0 12px;font-weight:850;font-size:1rem;background:rgba(255,255,255,.95);color:#0f172a}.goto-form button{background:var(--cyan);color:#02151a;min-height:44px}.goto-form small{grid-column:1/-1;color:var(--danger);font-weight:750}
.goal-card,.lesson-point,.activity-card,.list-section,.faq-section,.safety-section,.next-hook,.learning-lab,.index-stats article,.index-card{border:1px solid var(--line);background:linear-gradient(135deg,var(--card),rgba(255,255,255,.035));border-radius:var(--radius);box-shadow:0 16px 60px rgba(0,0,0,.22)}.goal-card{padding:28px;margin:12px 0 24px}.goal-card span,.section-title span,.point-kicker,.next-hook span{display:inline-flex;margin-bottom:8px;color:#86efac;font-weight:900;text-transform:uppercase;letter-spacing:.08em;font-size:.78rem}.goal-card p{font-size:1.18rem;color:#e5edf7;margin-top:8px}.points-grid{display:grid;grid-template-columns:1fr;gap:24px}.lesson-point{padding:28px;overflow:hidden}.lesson-point h2,.section-title h2{margin:5px 0 12px;font-size:clamp(1.45rem,2.8vw,2.35rem);line-height:1.17;letter-spacing:-.025em}.lesson-point p{font-size:1.04rem;color:var(--muted)}
.learning-lab,.split-section,.list-section,.faq-section,.safety-section,.next-hook{margin-top:24px}.learning-lab,.list-section,.faq-section,.safety-section,.next-hook{padding:28px}.diem-grid,.split-section{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.diem-card{padding:20px;border-radius:22px;border:1px solid rgba(255,255,255,.13);background:rgba(255,255,255,.06)}.diem-card span{display:inline-grid;place-items:center;min-width:70px;padding:5px 11px;border-radius:999px;background:rgba(6,182,212,.14);color:#a5f3fc;font-weight:900}.diem-card p{margin-top:12px;color:#e5edf7}.split-section{grid-template-columns:1fr 1fr}.activity-card{padding:28px}.checklist{margin-top:18px;padding:17px;border-radius:18px;background:rgba(34,197,94,.08);border:1px solid rgba(34,197,94,.18)}.smart-list{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.smart-list li{display:flex;gap:12px;padding:15px;border-radius:18px;background:rgba(255,255,255,.055);border:1px solid rgba(255,255,255,.1)}.smart-list span{flex:0 0 auto;display:grid;place-items:center;width:38px;height:38px;border-radius:14px;background:linear-gradient(135deg,var(--cyan),var(--purple));font-weight:950;color:#fff}.smart-list p{color:#e6eef8}.faq{padding:16px 18px;border-radius:18px;border:1px solid rgba(255,255,255,.12);background:rgba(255,255,255,.055);margin-top:12px}.faq summary{cursor:pointer;font-weight:900;color:#fff}.faq p{margin-top:10px}.safety-section{border-color:rgba(251,113,133,.25);background:linear-gradient(135deg,rgba(251,113,133,.12),rgba(255,255,255,.04))}.safety-section ul{padding-left:22px;color:#ffe4e6}.next-hook{background:linear-gradient(135deg,rgba(34,197,94,.14),rgba(6,182,212,.1))}.next-hook p{font-size:1.12rem;color:#e9fff2}
.acs-infographic-diagram{position:relative;min-height:430px;margin-top:22px;border-radius:30px;border:1px solid rgba(255,255,255,.16);background:radial-gradient(circle at 30% 20%,rgba(6,182,212,.18),transparent 35%),radial-gradient(circle at 80% 75%,rgba(168,85,247,.16),transparent 34%),rgba(4,12,25,.62);box-shadow:0 28px 80px rgba(0,0,0,.28);overflow:hidden;isolation:isolate}.acs-infographic-diagram figcaption{position:absolute;z-index:4;left:18px;top:16px;display:inline-flex;align-items:center;gap:8px;max-width:calc(100% - 36px);padding:8px 13px;border-radius:999px;background:rgba(7,17,31,.74);border:1px solid rgba(255,255,255,.18);backdrop-filter:blur(12px);font-weight:900;font-size:.78rem;color:#a7f3d0;letter-spacing:.04em}.schematic-layer{position:absolute;inset:0;width:100%;height:100%;z-index:1}.main-flow{fill:none;stroke-width:10;stroke-linecap:round;stroke-dasharray:18 14;animation:dashFlow 5.4s linear infinite}.tech-wire{fill:none;stroke-width:3.5;stroke-linecap:round;stroke-dasharray:6 10;opacity:.6}.wire-a{stroke:#22d3ee}.wire-b{stroke:#c084fc}.halo{fill:rgba(255,255,255,.045);stroke-width:4}.halo-a{stroke:#06b6d4}.halo-b{stroke:#22c55e}.halo-c{stroke:#8b5cf6}.infographic-nodes{position:absolute;z-index:3;inset:0;display:grid;grid-template-columns:repeat(3,1fr);align-items:center;gap:24px;padding:56px 34px 34px}.info-node{min-height:188px;display:grid;grid-template-columns:68px 1fr;align-items:center;gap:14px;padding:20px;border-radius:28px;background:linear-gradient(135deg,rgba(255,255,255,.16),rgba(255,255,255,.055));border:1px solid rgba(255,255,255,.18);box-shadow:0 22px 48px rgba(0,0,0,.25);backdrop-filter:blur(14px);position:relative;overflow:hidden}.info-node::before{content:"";position:absolute;inset:0 0 auto;height:7px;background:linear-gradient(90deg,#06b6d4,#22c55e,#f59e0b,#8b5cf6)}.info-node-1{transform:translateY(8px)}.info-node-2{transform:translateY(-22px)}.info-node-3{transform:translateY(8px)}.node-icon{width:62px;height:62px;border-radius:22px;display:grid;place-items:center;color:white;box-shadow:0 18px 30px rgba(15,23,42,.28)}.info-node-1 .node-icon{background:linear-gradient(135deg,#06b6d4,#2563eb)}.info-node-2 .node-icon{background:linear-gradient(135deg,#22c55e,#0f766e)}.info-node-3 .node-icon{background:linear-gradient(135deg,#f59e0b,#8b5cf6)}.node-icon svg{width:34px;height:34px;fill:currentColor}.node-content strong{display:inline-grid;place-items:center;min-width:44px;height:34px;padding:0 10px;border-radius:999px;background:rgba(255,255,255,.1);color:#e0f2fe;font-weight:1000;margin-bottom:10px}.node-content span{display:block;font-size:clamp(1.03rem,1.9vw,1.32rem);line-height:1.35;font-weight:950;color:#fff}@keyframes dashFlow{to{stroke-dashoffset:-220}}
.lesson-nav{position:sticky;bottom:12px;z-index:18;width:min(760px,calc(100% - 24px));margin:20px auto;display:grid;grid-template-columns:1fr 1fr 1fr;gap:12px;padding:10px;border:1px solid var(--line);border-radius:22px;background:rgba(7,17,31,.86);backdrop-filter:blur(18px);box-shadow:0 16px 40px rgba(0,0,0,.3)}.nav-btn{display:grid;place-items:center;min-height:48px;border-radius:16px;background:rgba(255,255,255,.08);font-weight:950}.nav-home{background:linear-gradient(135deg,var(--green),var(--cyan));color:#032018}.site-footer{border-top:1px solid var(--line);padding:42px max(18px,calc((100vw - var(--max))/2));background:rgba(2,6,23,.72)}.footer-grid{display:grid;grid-template-columns:1.2fr 1fr 1.2fr;gap:24px}.footer-brand{font-weight:950;font-size:1.35rem;margin-bottom:8px}.site-footer h2{margin:0 0 10px;font-size:1.1rem}.social-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}.social{display:inline-flex;align-items:center;gap:8px;min-height:42px;padding:8px 12px;border-radius:14px;border:1px solid rgba(255,255,255,.13);background:rgba(255,255,255,.07);font-weight:850}.social svg{width:20px;height:20px;fill:currentColor}.social-youtube{color:#ff0033}.social-instagram{color:#ff4fd8}.social-facebook{color:#1877f2}.social-whatsapp{color:#25d366}.social-telegram{color:#2aabee}.social-threads{color:#fff}.social-x{color:#fff}.social-linkedin{color:#0a66c2}.social-email,.social-site,.social-trust{color:#67e8f9}.footer-bottom{margin-top:24px;padding-top:18px;border-top:1px solid var(--line);color:var(--muted)}.index-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-bottom:24px}.index-stats article{padding:22px;text-align:center}.index-stats strong{display:block;font-size:2rem}.index-stats span{color:var(--muted);font-weight:850}.index-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.index-card{padding:22px;transition:.25s transform,.25s background}.index-card:hover{transform:translateY(-5px);background:var(--card2)}.card-top{display:flex;justify-content:space-between;gap:12px;margin-bottom:12px}.card-top span{padding:6px 10px;border-radius:999px;background:rgba(34,197,94,.14);color:#bbf7d0;font-weight:950}.card-top small{color:var(--muted);font-weight:850}.index-card h2{font-size:1.2rem;line-height:1.25;margin:0 0 8px}.index-card strong{display:inline-block;margin-top:15px;color:#67e8f9}.reveal{opacity:0;transform:translateY(18px);transition:.65s ease}.reveal.show{opacity:1;transform:none}

.progress-meter{display:grid;grid-template-columns:112px 1fr;gap:18px;align-items:center;margin:20px 0 26px;padding:20px;border:1px solid rgba(103,232,249,.28);border-radius:28px;background:linear-gradient(135deg,rgba(8,47,73,.92),rgba(15,23,42,.86));box-shadow:0 20px 70px rgba(6,182,212,.18),inset 0 1px 0 rgba(255,255,255,.08);position:relative;overflow:hidden}.progress-meter:before{content:"";position:absolute;inset:-80px auto auto -80px;width:210px;height:210px;border-radius:50%;background:radial-gradient(circle,rgba(34,197,94,.26),transparent 65%)}.progress-compact{margin-top:16px}.progress-orb{width:104px;height:104px;border-radius:50%;display:grid;place-items:center;background:conic-gradient(from 180deg,var(--cyan) var(--progress-deg,0deg),rgba(255,255,255,.12) 0);box-shadow:0 0 0 8px rgba(255,255,255,.06),0 18px 45px rgba(6,182,212,.22)}.progress-orb span{width:74px;height:74px;border-radius:50%;display:grid;place-items:center;background:#061326;color:#f8fafc;font-size:1.18rem;font-weight:1000}.progress-body{position:relative;z-index:1}.progress-head{display:flex;justify-content:space-between;gap:12px;align-items:center;margin-bottom:10px}.progress-head span{font-weight:1000;text-transform:uppercase;letter-spacing:.08em;color:#a7f3d0;font-size:.82rem}.progress-head strong{font-size:1.05rem;color:#fff}.progress-track{height:14px;border-radius:999px;background:rgba(255,255,255,.12);overflow:hidden;border:1px solid rgba(255,255,255,.1)}.progress-track i{display:block;width:0%;height:100%;border-radius:inherit;background:linear-gradient(90deg,#06b6d4,#22c55e,#f59e0b,#8b5cf6);transition:width .35s ease}.progress-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:11px;color:#cbd5e1;font-weight:850}.progress-meta span{padding:6px 10px;border-radius:999px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.1)}.progress-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}.progress-action{min-height:42px;border:0;border-radius:14px;padding:10px 13px;display:inline-flex;align-items:center;justify-content:center;font-weight:950;background:rgba(255,255,255,.09);color:#e5f7ff;border:1px solid rgba(255,255,255,.12);cursor:pointer}.primary-progress{background:linear-gradient(135deg,#22c55e,#06b6d4);color:#032018}.danger-progress{background:rgba(248,113,113,.14);color:#fecaca}.progress-note{margin:12px 0 0;color:#a9b7c7;font-size:.88rem}.index-card.is-complete{border-color:rgba(34,197,94,.48);background:linear-gradient(135deg,rgba(34,197,94,.13),rgba(255,255,255,.04))}.complete-badge{display:none;margin-bottom:10px;width:max-content;padding:5px 10px;border-radius:999px;background:rgba(34,197,94,.16);color:#bbf7d0;font-style:normal;font-weight:1000}.index-card.is-complete .complete-badge{display:inline-flex}

[dir="rtl"] .topbar,[dir="rtl"] .smart-list li{direction:rtl}[dir="rtl"] .info-node,[dir="rtl"] .diagram-node{text-align:right;direction:rtl}[dir="rtl"] .acs-infographic-diagram figcaption{left:auto;right:18px}
@media(max-width:900px){.hero{grid-template-columns:1fr;min-height:auto}.hero-copy{padding:24px}.hero-visual{min-height:360px}.diem-grid,.footer-grid,.index-grid,.index-stats{grid-template-columns:1fr}.split-section{grid-template-columns:1fr}.smart-list{grid-template-columns:1fr}.topbar{align-items:flex-start;flex-direction:column}.toplinks a{padding:7px 10px}.brand{font-size:.95rem}.point-head,.section-title-with-audio,.section-audio-row{align-items:flex-start;flex-direction:column}.block-audio{justify-content:flex-start}}
@media(max-width:640px){main{width:min(100% - 18px,var(--max));margin-bottom:44px}.hero{padding-top:24px;gap:18px}.hero h1{font-size:2.38rem}.hero-visual{min-height:330px}.goal-card,.lesson-point,.learning-lab,.list-section,.faq-section,.safety-section,.next-hook,.activity-card{padding:20px;border-radius:22px}.goto-form{grid-template-columns:1fr 92px;gap:8px}.goto-form label{grid-column:1/-1}.acs-infographic-diagram{min-height:690px;margin-left:-6px;margin-right:-6px;border-radius:28px}.acs-infographic-diagram figcaption{position:relative;left:auto;top:auto;margin:14px 14px 0;white-space:normal;text-align:center;justify-content:center}.schematic-layer{display:none}.infographic-nodes{position:relative;display:grid;grid-template-columns:1fr;gap:18px;padding:18px 14px 18px}.info-node{min-height:150px;grid-template-columns:74px 1fr;padding:18px;border-radius:26px}.info-node-1,.info-node-2,.info-node-3{transform:none}.info-node:not(:last-child)::after{content:"↓";position:absolute;left:50%;bottom:-27px;transform:translateX(-50%);width:38px;height:38px;border-radius:50%;display:grid;place-items:center;background:linear-gradient(135deg,#06b6d4,#8b5cf6);color:#fff;font-weight:1000;box-shadow:0 12px 28px rgba(59,130,246,.25);z-index:5}.node-icon{width:64px;height:64px}.node-content span{font-size:1.13rem}.lesson-nav{grid-template-columns:1fr 1fr 1fr;gap:7px;width:calc(100% - 14px);bottom:8px;border-radius:18px}.nav-btn{font-size:.9rem;min-height:46px}.audio-dock{right:9px;left:9px;bottom:72px;justify-content:space-between}.progress-meter{grid-template-columns:1fr;text-align:center;padding:18px}.progress-orb{margin:auto}.progress-head{justify-content:center;flex-direction:column}.progress-meta,.progress-actions{justify-content:center}.progress-action{width:100%}.social span{display:none}.footer-grid{gap:18px}.site-footer{padding-bottom:88px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}