:root{
 --v18-navy:#08101f;--v18-blue:#3157ff;--v18-cyan:#16c7d9;--v18-violet:#7657ff;
 --v18-green:#0fb981;--v18-orange:#ff9f43;--v18-pink:#ef4f91;--v18-soft:#f5f7ff;
}
body{background:linear-gradient(180deg,#f8faff 0,#f7f8fb 35%,#fff 100%);}
.v18-top{background:rgba(8,16,31,.93);border-bottom:1px solid rgba(255,255,255,.08);box-shadow:0 8px 30px rgba(7,13,28,.15)}
.v18-top .topin{height:74px}.v18-top .brand,.v18-top .nav a{color:#fff}.v18-top .nav a{opacity:.82}.v18-top .nav a:hover{opacity:1;color:#8be9ff}.v18-top .lang,.v18-top .account-btn{background:rgba(255,255,255,.09);color:#fff;border-color:rgba(255,255,255,.18)}
.v18-brand .brandmark{background:linear-gradient(135deg,var(--v18-blue),var(--v18-cyan));box-shadow:0 8px 24px rgba(49,87,255,.45)}.v18-brand b{color:#8be9ff}
.v18-homehero{position:relative;overflow:hidden;background:radial-gradient(circle at 80% 10%,rgba(118,87,255,.28),transparent 32%),radial-gradient(circle at 20% 20%,rgba(22,199,217,.18),transparent 32%),linear-gradient(135deg,#08101f 0%,#111d3f 60%,#19285b 100%);color:#fff;padding:82px 0 76px}
.v18-homehero:after{content:"";position:absolute;inset:auto -15% -45% 35%;height:420px;background:linear-gradient(90deg,transparent,rgba(49,87,255,.22));transform:rotate(-12deg);filter:blur(2px)}
.v18-hero-grid{position:relative;z-index:2;display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}.v18-homehero h1{font-size:clamp(48px,6.4vw,82px);max-width:900px;margin:12px 0 22px}.v18-homehero .lead{font-size:20px;line-height:1.65;color:#cbd5f3;max-width:760px}.v18-homehero .kicker{color:#7ee8f4}.v18-homehero .primary{background:linear-gradient(135deg,var(--v18-blue),var(--v18-violet));box-shadow:0 12px 30px rgba(49,87,255,.35)}.v18-homehero .secondary{background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.2);color:#fff}
.v18-metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-top:34px}.v18-metric{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.12);border-radius:16px;padding:14px 15px;backdrop-filter:blur(10px)}.v18-metric strong{display:block;font-size:24px}.v18-metric span{font-size:11px;color:#b8c5e5}
.learning-orbit{position:relative;min-height:410px;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.12);border-radius:34px;padding:24px;box-shadow:0 35px 100px rgba(0,0,0,.25);backdrop-filter:blur(12px)}
.orbit-core{position:absolute;inset:50% auto auto 50%;transform:translate(-50%,-50%);width:150px;height:150px;border-radius:50%;display:grid;place-items:center;text-align:center;background:linear-gradient(135deg,#3157ff,#16c7d9);box-shadow:0 0 0 18px rgba(49,87,255,.12),0 0 70px rgba(22,199,217,.35);font-weight:900;font-size:18px}
.orbit-node{position:absolute;width:128px;padding:12px;border-radius:16px;background:#fff;color:#10182b;box-shadow:0 15px 45px rgba(0,0,0,.18);font-size:12px}.orbit-node b{display:block;font-size:13px}.orbit-node.one{left:22px;top:34px}.orbit-node.two{right:20px;top:55px}.orbit-node.three{left:34px;bottom:35px}.orbit-node.four{right:24px;bottom:30px}.orbit-node i{font-style:normal;font-size:18px}
.v18-proof{margin-top:-34px;position:relative;z-index:4}.v18-proof-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.proof-card{background:#fff;border:1px solid #e7eaf2;border-radius:18px;padding:18px;box-shadow:0 18px 50px rgba(16,24,50,.08)}.proof-card b{display:block;font-size:14px;margin-bottom:4px}.proof-card span{font-size:12px;color:#6b7488}
.v18-section{padding:72px 0}.v18-section.soft{background:linear-gradient(180deg,#f2f6ff,#fff)}.v18-title{font-size:clamp(32px,4vw,50px);letter-spacing:-.04em;margin:8px 0 14px}.v18-sub{color:#667086;max-width:720px;font-size:17px}
.pathway-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:28px}.pathway-card{position:relative;overflow:hidden;border-radius:24px;padding:22px;background:#fff;border:1px solid #e5e9f4;min-height:220px;box-shadow:0 18px 55px rgba(31,50,95,.07)}.pathway-card:before{content:"";position:absolute;inset:0 0 auto;height:5px;background:linear-gradient(90deg,var(--v18-blue),var(--v18-cyan))}.pathway-card:nth-child(2):before{background:linear-gradient(90deg,var(--v18-violet),var(--v18-pink))}.pathway-card:nth-child(3):before{background:linear-gradient(90deg,var(--v18-green),var(--v18-cyan))}.pathway-card:nth-child(4):before{background:linear-gradient(90deg,var(--v18-orange),var(--v18-pink))}.pathway-icon{font-size:30px}.pathway-card h3{font-size:21px;margin:15px 0 8px}.pathway-card p{font-size:13px;color:#6b7488}.pathway-card a{font-weight:850;color:var(--v18-blue);font-size:12px}
.ai-showcase{display:grid;grid-template-columns:.8fr 1.2fr;gap:24px;background:linear-gradient(135deg,#101a37,#171d45);border-radius:30px;padding:30px;color:#fff;box-shadow:0 28px 80px rgba(22,31,74,.2)}.ai-showcase p{color:#c9d2ef}.ai-demo{background:#fff;color:#141b2e;border-radius:22px;padding:18px}.chat-row{display:flex;gap:10px;margin:10px 0}.chat-bubble{max-width:84%;padding:12px 14px;border-radius:15px;font-size:13px;line-height:1.55}.chat-user{margin-left:auto;background:#edf1ff}.chat-ai{background:#eefaf7}.ai-chiprow{display:flex;gap:7px;flex-wrap:wrap;margin-top:10px}.ai-chip{border:1px solid #dce2f1;background:#fff;border-radius:999px;padding:7px 9px;font-size:11px}
.revenue-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:28px}.revenue-card{border:1px solid #e4e8f1;border-radius:22px;padding:20px;background:#fff}.revenue-card .money{font-size:25px}.revenue-card h3{margin:8px 0}.revenue-card p{font-size:13px;color:#6b7488}
.premium-strip{background:linear-gradient(135deg,#3157ff,#7657ff);color:#fff;border-radius:28px;padding:28px;display:flex;justify-content:space-between;align-items:center;gap:24px}.premium-strip p{color:#dfe4ff}.premium-strip .btn{background:#fff;color:#2634a7}
.v18-dashboard-hero{background:linear-gradient(135deg,#0d1831,#18326b);color:#fff;border-radius:28px;padding:30px;margin-bottom:24px;display:grid;grid-template-columns:1fr auto;gap:24px}.v18-dashboard-hero p{color:#c6d1ed}.student-kpis{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin:18px 0}.student-kpi{background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.13);border-radius:15px;padding:14px}.student-kpi strong{font-size:22px;display:block}.student-kpi span{font-size:11px;color:#cbd5ef}
.student-tools{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:22px 0 30px}.student-tool{background:#fff;border:1px solid #e4e8f2;border-radius:20px;padding:18px}.student-tool b{display:block;margin-bottom:5px}.student-tool p{font-size:12px;color:#6b7488}.student-tool a{font-size:12px;color:var(--v18-blue);font-weight:850}
.ai-fab{position:fixed;right:22px;bottom:22px;z-index:70;background:linear-gradient(135deg,#3157ff,#7657ff);color:#fff;border-radius:999px;padding:13px 17px;box-shadow:0 18px 40px rgba(49,87,255,.35);display:flex;align-items:center;gap:8px;font-size:12px}.ai-fab span{font-size:18px}.ai-fab:hover{transform:translateY(-2px)}
.ai-page{padding:48px 0 80px}.ai-layout{display:grid;grid-template-columns:280px minmax(0,1fr);gap:18px}.ai-sidebar,.ai-panel{background:#fff;border:1px solid #e4e8f2;border-radius:24px;padding:20px}.ai-sidebar h3{margin-top:0}.ai-mode{display:block;width:100%;text-align:left;border:1px solid #e5e8f0;background:#fff;border-radius:12px;padding:10px;margin:8px 0;cursor:pointer}.ai-mode.active{border-color:#3157ff;background:#f1f4ff}.ai-conversation{min-height:420px;background:#f8faff;border-radius:18px;padding:18px;overflow:auto}.ai-inputbar{display:grid;grid-template-columns:1fr auto;gap:10px;margin-top:12px}.ai-inputbar textarea{resize:vertical;min-height:64px;border:1px solid #dce2ed;border-radius:13px;padding:12px}.ai-status{font-size:11px;color:#768096;margin-top:8px}
.pricing-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:28px}.price-card{background:#fff;border:1px solid #e4e8f1;border-radius:26px;padding:24px;position:relative}.price-card.featured{border:2px solid #5268ff;box-shadow:0 22px 70px rgba(49,87,255,.16);transform:translateY(-6px)}.price{font-size:40px;font-weight:950;letter-spacing:-.04em}.price small{font-size:13px;font-weight:600;color:#6b7488}.price-card ul{padding-left:18px;color:#4d5669}.price-card li{margin:8px 0}.monetization-lab{margin-top:40px}.monetization-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.monetization-item{background:#fff;border:1px solid #e5e9f1;border-radius:17px;padding:15px}.monetization-item b{display:block}.monetization-item span{font-size:11px;color:#6b7488}
@media(max-width:950px){.v18-hero-grid,.ai-showcase,.ai-layout{grid-template-columns:1fr}.pathway-grid,.v18-proof-grid{grid-template-columns:repeat(2,1fr)}.revenue-grid,.pricing-grid{grid-template-columns:1fr}.monetization-grid{grid-template-columns:repeat(2,1fr)}.student-kpis{grid-template-columns:repeat(2,1fr)}.student-tools{grid-template-columns:1fr}.learning-orbit{min-height:360px}}
@media(max-width:620px){.v18-homehero{padding:55px 0}.v18-metrics,.pathway-grid,.v18-proof-grid,.student-kpis,.monetization-grid{grid-template-columns:1fr 1fr}.learning-orbit{display:none}.v18-hero-grid{display:block}.premium-strip{display:block}.ai-fab b{display:none}.ai-fab{width:50px;height:50px;justify-content:center;padding:0}.v18-top .brand span:last-child{font-size:11px}}

.donate-btn{background:linear-gradient(135deg,#0070ba,#003087)!important;color:#fff!important;border:0!important;white-space:nowrap}.v18-top .donate-btn{padding:9px 12px;font-size:11px}.v18-footer .donate-btn{display:inline-flex;margin:4px 8px}