/* Light theme (white + blue) with sidebar */
:root{
  --bg:#f7f8fc; --card:#fff; --line:#e6e8f0; --text:#0d1b2a; --muted:#5b6b8c;
  --primary:#2b59c3; --primary-600:#244aa2; --ok:#16a34a; --danger:#d61f45;
  --shadow:0 6px 22px rgba(13,27,42,.08);
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);font-family:Inter,system-ui,Segoe UI,Roboto,Arial;color:var(--text)}
a{color:inherit;text-decoration:none}
.container{max-width:1200px;margin:0 auto;padding:20px}
.header{display:flex;align-items:center;justify-content:space-between;padding:10px 0;gap:12px}
.brand{display:flex;align-items:center;gap:8px;font-size:22px;font-weight:800}
.brand img{height:48px;width:auto;object-fit:contain}
.nav{display:flex;gap:10px;flex-wrap:wrap;justify-content:flex-end}
.nav a{padding:10px 14px;border:1px solid var(--line);border-radius:10px;background:#fff;box-shadow:var(--shadow)}
.nav a:hover{background:#f2f6ff;border-color:#d8e2ff}
.banner{margin:12px 0;padding:10px 14px;background:#f0f5ff;border:1px solid #dfe7ff;border-radius:10px;box-shadow:var(--shadow);color:#244aa2}

.layout{display:grid;grid-template-columns:260px 1fr;gap:16px;margin-top:10px}
.sidebar{padding:12px;background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow)}
.sidebar h3{margin:0 0 10px 0;font-size:16px}
.sidebar a{display:block;padding:8px 10px;border-radius:8px;border:1px solid transparent;color: var(--primary); font-weight: 700}
.sidebar a:hover{background:#f6f8ff;border-color:#e6edff}
.sidebar .active{background:#eef3ff;border-color:#d9e5ff}

.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow);overflow:hidden;display:flex;flex-direction:column}
.card .thumb{aspect-ratio:16/9;background:#eef2f9;display:block;width:100%;object-fit:cover}
.card .body{padding:12px}
.card h3{font-size:16px;margin:0 0 6px}
.card p{margin:0;color:var(--muted);font-size:13px;min-height:32px}
.badges{display:flex;gap:6px;margin-top:8px;flex-wrap:wrap}
.badge{font-size:11px;border:1px solid var(--line);padding:3px 7px;border-radius:999px;background:#f7f9ff;color:#244aa2}
.price{margin-top:8px;font-weight:800;font-size:16px;color:var(--primary)}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:9px 12px;border-radius:10px;border:1px solid var(--line);background:#fff;box-shadow:var(--shadow);cursor:pointer;font-weight:600}
.btn:hover{background:#f2f6ff;border-color:#d8e2ff}
.btn.primary{background:var(--primary);color:#fff;border-color:var(--primary);box-shadow:0 6px 18px rgba(43,89,195,.25)}
.btn.primary:hover{background:var(--primary-600)}
.btn.ok{background:#12a150;color:#fff;border-color:#0f8a45}
.btn.danger{background:#e11d48;color:#fff;border-color:var(--danger)}
.footer{margin:28px 0;color:var(--muted);font-size:13px;text-align:center}

.hero{display:flex;gap:12px;flex-wrap:wrap;margin-top:6px}
.hero .col{flex:1;min-width:260px}
.hero .feature{padding:10px 12px;border-radius:12px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);font-size:14px;color:#233553}
.kicker{font-size:12px;color:#244aa2;letter-spacing:.2px;text-transform:uppercase}

.product{display:grid;grid-template-columns:2fr 1fr;gap:16px;margin-top:12px}
.product .media{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;box-shadow:var(--shadow);padding:10px}
.product .media iframe,.product .media img,.product .media audio{width:100%;display:block;border-radius:8px}
.product .content{background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow);padding:14px}
.product .content h1{margin-top:0;margin-bottom:6px}
.product .desc{margin-top:12px;line-height:1.6;color:#233553}

.modal{position:fixed;inset:0;background:rgba(13,27,42,.45);display:none;place-items:center;padding:16px;z-index:50}
.modal.show{display:grid}
.modal .box{width:min(720px,100%);background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow);padding:16px}
.modal .row{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin-top:8px}
.input{padding:10px 12px;border-radius:10px;background:#fff;border:1px solid var(--line);color:#0d1b2a;width:100%}
.code{font-family:ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Courier New", monospace;background:#f5f7fd;border:1px dashed #9db4ff;border-radius:10px;padding:10px}

@media (max-width:1000px){ .layout{grid-template-columns:1fr} }
@media (max-width:900px){ .grid{grid-template-columns:1fr 1fr} .product{grid-template-columns:1fr} }
@media (max-width:600px){ .grid{grid-template-columns:1fr} }