:root{--bg:#f7f8fb;--dark:#111827;--muted:#6b7280;--card:#fff;--primary:#2563eb;--primary-dark:#1d4ed8;--border:#e5e7eb;--green:#16a34a}*{box-sizing:border-box}body{margin:0;font-family:Inter,Arial,sans-serif;background:var(--bg);color:var(--dark)}a{text-decoration:none;color:inherit}.container{width:min(1120px,92%);margin:auto}.navbar{position:sticky;top:0;background:rgba(255,255,255,.9);backdrop-filter:blur(12px);border-bottom:1px solid var(--border);z-index:10}.nav-inner{display:flex;align-items:center;justify-content:space-between;padding:18px 0}.brand{font-weight:800;font-size:24px}.brand span{color:var(--primary)}.btn{display:inline-flex;align-items:center;gap:8px;border:none;border-radius:14px;padding:12px 18px;font-weight:700;cursor:pointer;transition:.2s}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-dark);transform:translateY(-1px)}.btn-wa{background:var(--green);color:#fff}.btn-light{background:#fff;border:1px solid var(--border)}.hero{padding:72px 0 44px}.hero-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:36px;align-items:center}.badge{display:inline-block;background:#dbeafe;color:#1e40af;border-radius:999px;padding:8px 14px;font-weight:700;font-size:14px}.hero h1{font-size:54px;line-height:1.04;margin:18px 0}.hero p{font-size:18px;color:var(--muted);line-height:1.7}.hero-card{background:linear-gradient(145deg,#ffffff,#eef4ff);padding:26px;border:1px solid var(--border);border-radius:28px;box-shadow:0 20px 60px rgba(37,99,235,.12)}.hero-card img{width:100%}.section{padding:34px 0 70px}.section-title{text-align:center;margin-bottom:30px}.section-title h2{font-size:36px;margin:0 0 10px}.section-title p{color:var(--muted);margin:0}.products{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.product-card{background:var(--card);border:1px solid var(--border);border-radius:24px;overflow:hidden;box-shadow:0 12px 30px rgba(17,24,39,.05);display:flex;flex-direction:column}.product-img{height:190px;background:#eef4ff;display:grid;place-items:center}.product-img img{width:100%;height:100%;object-fit:cover}.product-body{padding:20px;display:flex;flex-direction:column;gap:12px;flex:1}.product-body h3{margin:0;font-size:20px}.product-body p{margin:0;color:var(--muted);line-height:1.55}.price-row{display:flex;justify-content:space-between;align-items:center;margin-top:auto}.price{font-weight:900;font-size:20px}.stock{font-size:13px;color:#047857;background:#d1fae5;padding:6px 10px;border-radius:999px}.detail{padding:54px 0}.detail-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:34px}.detail-img{background:#fff;border:1px solid var(--border);border-radius:26px;overflow:hidden}.detail-img img{width:100%;height:420px;object-fit:cover}.detail-content{background:#fff;border:1px solid var(--border);border-radius:26px;padding:30px}.detail-content h1{font-size:40px;margin:0 0 12px}.detail-content .desc{color:var(--muted);line-height:1.8}.admin-wrap{min-height:100vh;display:grid;place-items:center;padding:30px}.login-card,.admin-card{background:#fff;border:1px solid var(--border);border-radius:22px;box-shadow:0 15px 40px rgba(17,24,39,.08);padding:26px}.login-card{width:min(420px,100%)}.form-group{margin-bottom:14px}.form-group label{display:block;font-weight:700;margin-bottom:7px}.input,textarea,select{width:100%;border:1px solid var(--border);border-radius:12px;padding:12px 14px;font:inherit}textarea{min-height:130px}.alert{padding:12px 14px;border-radius:12px;margin-bottom:14px}.alert-error{background:#fee2e2;color:#991b1b}.alert-success{background:#dcfce7;color:#166534}.admin-layout{display:grid;grid-template-columns:240px 1fr;min-height:100vh}.sidebar{background:#111827;color:#fff;padding:24px}.sidebar a{display:block;padding:12px 10px;border-radius:10px;color:#d1d5db}.sidebar a:hover,.sidebar .active{background:#1f2937;color:#fff}.content{padding:28px}.topbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}.table{width:100%;border-collapse:collapse;background:#fff;border-radius:16px;overflow:hidden}.table th,.table td{padding:14px;border-bottom:1px solid var(--border);text-align:left}.actions{display:flex;gap:8px;flex-wrap:wrap}.small{font-size:13px;color:var(--muted)}.footer{text-align:center;color:var(--muted);border-top:1px solid var(--border);padding:26px 0;background:#fff}@media(max-width:850px){.hero-grid,.detail-grid,.admin-layout{grid-template-columns:1fr}.hero h1{font-size:38px}.products{grid-template-columns:1fr}.sidebar{position:static}.topbar{align-items:flex-start;gap:12px;flex-direction:column}.table{font-size:14px}}