:root{--primary:#0f4c81;--primary-2:#11b5d8;--accent:#c7e96a;--text:#0f172a;--muted:#64748b;--bg:#f8fbfd;--card:#ffffff;--line:#dbe7ef;--success:#16a34a;--warning:#f59e0b;--danger:#dc2626;--shadow:0 20px 40px rgba(15,76,129,.08);--radius:22px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,Arial,sans-serif;color:var(--text);background:linear-gradient(180deg,#f8fbfd 0%,#eef7fb 100%)}a{text-decoration:none;color:inherit}img{max-width:100%;display:block}
.container{width:min(1180px,92%);margin:0 auto}.topbar{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.88);backdrop-filter:blur(10px);border-bottom:1px solid rgba(219,231,239,.9)}
.nav{display:flex;align-items:center;justify-content:space-between;padding:16px 0;gap:18px}.brand{display:flex;align-items:center;gap:14px;font-weight:800;font-size:1.15rem}.brand img{width:64px;height:auto}
.menu{display:flex;flex-wrap:wrap;gap:10px;align-items:center}.menu a{padding:10px 14px;border-radius:999px;color:#15324c;font-weight:600;font-size:.95rem}.menu a:hover,.menu a.active{background:#e8f5fb;color:var(--primary)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 18px;border-radius:14px;border:1px solid transparent;font-weight:700;cursor:pointer;transition:.2s}.btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff;box-shadow:var(--shadow)}.btn-secondary{background:#fff;border-color:var(--line);color:var(--primary)}.btn-accent{background:var(--accent);color:#16304a}
.hero{padding:70px 0 42px}.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:28px;align-items:center}.card{background:var(--card);border:1px solid rgba(219,231,239,.95);border-radius:var(--radius);box-shadow:var(--shadow)}.panel{padding:28px}.hero h1{font-size:3rem;line-height:1.05;margin:0 0 16px}.hero p{font-size:1.07rem;color:var(--muted);line-height:1.7;margin:0 0 20px}
.badge{display:inline-flex;align-items:center;gap:8px;padding:8px 14px;border-radius:999px;background:#e9f9ff;color:var(--primary);font-weight:800;font-size:.85rem;margin-bottom:14px}.kpis{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:18px}.kpi{padding:16px;border-radius:18px;background:#fff;border:1px solid var(--line)}.kpi strong{display:block;font-size:1.35rem}
.grid-2,.grid-3,.grid-4{display:grid;gap:18px}.grid-2{grid-template-columns:repeat(2,1fr)}.grid-3{grid-template-columns:repeat(3,1fr)}.grid-4{grid-template-columns:repeat(4,1fr)}
.section{padding:28px 0 48px}.section-head{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:18px}.section-head h2{font-size:2rem;margin:0}.section-head p{margin:0;color:var(--muted)}
.feature,.subject,.price,.mini-card,.stat,.table-wrap,.timeline,.notice{padding:22px}.feature h3,.subject h3,.price h3,.mini-card h3{margin:0 0 8px}
.subject ul,.feature ul,.price ul{margin:12px 0 0;padding-left:18px;color:var(--muted);line-height:1.7}.price .amount{font-size:2.4rem;font-weight:900;color:var(--primary)}.price small{color:var(--muted)}
.tag{display:inline-block;padding:7px 11px;border-radius:999px;background:#eff8ff;color:var(--primary);font-size:.82rem;font-weight:800}.list{display:grid;gap:10px}.list .item{display:flex;justify-content:space-between;gap:16px;padding:14px;border:1px solid var(--line);border-radius:16px;background:#fff}
footer{padding:26px 0 46px;color:#45617c}.footer-grid{display:grid;grid-template-columns:1.1fr .8fr .8fr .8fr;gap:20px}.page-title{padding:38px 0 10px}.page-title h1{font-size:2.5rem;margin:0 0 8px}.page-title p{margin:0;color:var(--muted);max-width:860px;line-height:1.7}
.sidebar-layout{display:grid;grid-template-columns:260px 1fr;gap:22px;padding:24px 0 50px}.sidebar .side-link{display:flex;align-items:center;justify-content:space-between;padding:12px 14px;margin-bottom:8px;border-radius:14px;color:#23425f;font-weight:700}.sidebar .side-link:hover,.sidebar .side-link.active{background:#e9f7fc;color:var(--primary)}
.metric{padding:18px;border-radius:20px;background:#fff;border:1px solid var(--line)}.metric .value{font-size:2rem;font-weight:900}.table{width:100%;border-collapse:collapse}.table th,.table td{padding:14px;border-bottom:1px solid var(--line);text-align:left}.table th{font-size:.82rem;color:var(--muted);text-transform:uppercase;letter-spacing:.04em}
.progress{width:100%;height:11px;background:#e8eef4;border-radius:999px;overflow:hidden}.progress>span{display:block;height:100%;background:linear-gradient(90deg,var(--primary),var(--primary-2))}
.notice{border-left:5px solid var(--accent)}.form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.field{display:flex;flex-direction:column;gap:8px}label{font-weight:700;font-size:.95rem}input,select,textarea{width:100%;padding:14px 14px;border:1px solid var(--line);border-radius:14px;background:#fff;font:inherit;color:var(--text)}textarea{min-height:120px;resize:vertical}
.auth-box{width:min(820px,92%);margin:20px auto 60px}.auth-grid{display:grid;grid-template-columns:1fr 1fr;gap:0;overflow:hidden}.auth-side{padding:34px;background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff}.auth-form{padding:34px}
.live-box{min-height:380px;display:grid;grid-template-columns:1.15fr .85fr;gap:18px}.video-stage{min-height:320px;border-radius:20px;background:radial-gradient(circle at top right,rgba(17,181,216,.35),transparent 26%),linear-gradient(135deg,#0e3557,#183f65 55%,#0f4c81);color:#fff;padding:24px;display:flex;flex-direction:column;justify-content:space-between}.chat-box{padding:18px}.chat-msg{padding:12px 14px;border-radius:16px;background:#f6fbff;border:1px solid var(--line);margin-bottom:10px}
.calendar{display:grid;grid-template-columns:repeat(7,1fr);gap:10px}.calendar .day{padding:12px;border-radius:16px;border:1px solid var(--line);background:#fff;min-height:90px}.calendar .day strong{display:block;margin-bottom:8px}
.breadcrumb{display:flex;gap:10px;color:var(--muted);font-size:.92rem;margin-top:10px}.cta-strip{margin:16px 0 0;padding:22px;border-radius:22px;background:linear-gradient(135deg,#eafaff,#f7ffea);border:1px solid var(--line)}.small{font-size:.92rem;color:var(--muted)}.center{text-align:center}
@media (max-width:980px){.hero-grid,.sidebar-layout,.live-box,.auth-grid,.grid-4,.grid-3,.grid-2,.footer-grid,.form-grid{grid-template-columns:1fr}.menu{display:none}.hero h1{font-size:2.3rem}.kpis{grid-template-columns:1fr}}