/* Best Robot Vacuum 2026 - Main Stylesheet */
* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
    --bg: #0d0d1a;
    --bg-card: #14142a;
    --bg-hover: #1c1c3a;
    --accent: #00d4aa;
    --accent-dim: rgba(0, 212, 170, 0.15);
    --text: #e8e8f0;
    --text-muted: #8888a0;
    --border: #2a2a4a;
    --font-display: 'Bebas Neue', sans-serif;
    --font-body: 'DM Sans', sans-serif;
    --price: #ffd700;
}

body { font-family: var(--font-body); background: var(--bg); color: var(--text); line-height: 1.7; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.bg-effect { position: fixed; top: -50%; left: -50%; width: 200%; height: 200%;
    background: radial-gradient(ellipse at 30% 20%, rgba(0, 212, 170, 0.05) 0%, transparent 60%),
                radial-gradient(ellipse at 70% 80%, rgba(0, 100, 255, 0.04) 0%, transparent 60%);
    z-index: -1; pointer-events: none; }

.container { max-width: 1100px; margin: 0 auto; padding: 0 20px; }

/* Header */
header { border-bottom: 1px solid var(--border); position: sticky; top: 0; background: rgba(13, 13, 26, 0.95); backdrop-filter: blur(10px); z-index: 100; }
.header-inner { display: flex; justify-content: space-between; align-items: center; padding: 18px 0; }
.logo { font-family: var(--font-display); font-size: 1.5rem; letter-spacing: 2px; color: var(--accent); }
nav { display: flex; gap: 28px; }
nav a { color: var(--text-muted); font-size: 0.9rem; font-weight: 500; text-transform: uppercase; letter-spacing: 1px; transition: color 0.2s; }
nav a:hover { color: var(--accent); text-decoration: none; }

/* Hero */
.hero { text-align: center; padding: 100px 0 80px; }
.hero-badge { display: inline-block; background: var(--accent-dim); color: var(--accent); padding: 8px 20px; border-radius: 20px; font-size: 0.85rem; font-weight: 600; margin-bottom: 28px; border: 1px solid rgba(0, 212, 170, 0.2); }
.hero h1 { font-family: var(--font-display); font-size: 3.8rem; line-height: 1.1; letter-spacing: 3px; margin-bottom: 20px; }
.hero h1 span { color: var(--accent); }
.hero-desc { max-width: 700px; margin: 0 auto 35px; color: var(--text-muted); font-size: 1.05rem; line-height: 1.8; }
.hero-btns { display: flex; gap: 16px; justify-content: center; }

.btn { display: inline-block; padding: 14px 36px; border-radius: 8px; font-weight: 600; font-size: 0.95rem; transition: all 0.3s; }
.btn-primary { background: var(--accent); color: #0d0d1a; }
.btn-primary:hover { background: #00e8ba; transform: translateY(-2px); text-decoration: none; }
.btn-outline { border: 2px solid var(--border); color: var(--text); }
.btn-outline:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); text-decoration: none; }

/* Section Common */
section { padding: 80px 0; }
h2 { font-family: var(--font-display); font-size: 2.8rem; letter-spacing: 2px; text-align: center; margin-bottom: 12px; }
.section-desc { text-align: center; color: var(--text-muted); max-width: 600px; margin: 0 auto 50px; font-size: 1.05rem; }

/* Compare Table */
.compare-table { width: 100%; border-collapse: collapse; background: var(--bg-card); border-radius: 12px; overflow: hidden; }
.compare-table th { background: var(--bg-hover); padding: 16px 14px; text-align: left; font-size: 0.8rem; text-transform: uppercase; letter-spacing: 1px; color: var(--text-muted); font-weight: 600; }
.compare-table td { padding: 16px 14px; border-bottom: 1px solid var(--border); font-size: 0.95rem; }
.compare-table tr:last-child td { border-bottom: none; }
.compare-table tr:hover td { background: var(--bg-hover); }
.compare-table .price { color: var(--price); font-weight: 700; }
.compare-table .rating { color: #f0c040; }

.best-tag { display: inline-block; background: var(--accent); color: #0d0d1a; font-size: 0.7rem; font-weight: 700; padding: 3px 10px; border-radius: 4px; margin-left: 8px; letter-spacing: 0.5px; vertical-align: middle; }

/* Product Cards */
.product-card { background: var(--bg-card); border-radius: 16px; padding: 40px; margin-bottom: 30px; border: 1px solid var(--border); transition: border-color 0.3s; }
.product-card:hover { border-color: rgba(0, 212, 170, 0.3); }
.product-card.featured { border-color: rgba(0, 212, 170, 0.3); box-shadow: 0 0 40px rgba(0, 212, 170, 0.05); }

.product-grid { display: grid; grid-template-columns: 1fr 1.5fr; gap: 40px; align-items: start; }
.product-img img { width: 100%; border-radius: 12px; }

.product-info h3 { font-size: 1.5rem; margin-bottom: 4px; }
.product-info h4 { color: var(--accent); font-size: 0.9rem; font-weight: 500; margin-bottom: 18px; }
.product-price { font-size: 1.8rem; font-weight: 700; color: var(--price); margin-bottom: 18px; }
.product-price del { font-size: 1.1rem; color: var(--text-muted); font-weight: 400; margin-left: 10px; }

.features-list { list-style: none; margin-bottom: 24px; }
.features-list li { padding: 8px 0 8px 28px; position: relative; color: var(--text-muted); font-size: 0.95rem; border-bottom: 1px solid rgba(42, 42, 74, 0.5); }
.features-list li:last-child { border-bottom: none; }
.features-list li::before { content: '✓'; position: absolute; left: 0; color: var(--accent); font-weight: 700; }

.btn-buy { display: inline-block; background: linear-gradient(135deg, var(--accent), #00a0e0); color: #fff; padding: 14px 40px; border-radius: 8px; font-weight: 700; font-size: 1rem; transition: all 0.3s; }
.btn-buy:hover { transform: translateY(-2px); box-shadow: 0 8px 25px rgba(0, 212, 170, 0.3); text-decoration: none; }

.featured-tag { display: inline-block; background: linear-gradient(135deg, var(--accent), #ffd700); color: #0d0d1a; font-size: 0.75rem; font-weight: 700; padding: 5px 16px; border-radius: 6px; margin-bottom: 14px; letter-spacing: 1px; }

/* Buying Guide */
.guide-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.guide-card { background: var(--bg-card); border-radius: 12px; padding: 30px; border: 1px solid var(--border); transition: all 0.3s; }
.guide-card:hover { border-color: rgba(0, 212, 170, 0.3); transform: translateY(-4px); }
.guide-icon { font-size: 2.4rem; margin-bottom: 14px; }
.guide-card h3 { font-size: 1.15rem; margin-bottom: 10px; }
.guide-card p { color: var(--text-muted); font-size: 0.9rem; line-height: 1.7; }

/* FAQ */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item { background: var(--bg-card); border-radius: 12px; padding: 24px 30px; margin-bottom: 14px; border: 1px solid var(--border); cursor: pointer; transition: border-color 0.3s; }
.faq-item:hover { border-color: rgba(0, 212, 170, 0.3); }
.faq-item h3 { font-size: 1.05rem; font-weight: 600; margin-bottom: 10px; color: var(--text); }
.faq-item p { color: var(--text-muted); font-size: 0.92rem; line-height: 1.8; }

/* Footer */
footer { border-top: 1px solid var(--border); padding: 30px 0; text-align: center; color: var(--text-muted); font-size: 0.85rem; }

/* Blog */
.blog-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; margin-top: 40px; }
.blog-card { background: var(--bg-card); border-radius: 12px; overflow: hidden; border: 1px solid var(--border); transition: all 0.3s; }
.blog-card:hover { border-color: rgba(0, 212, 170, 0.3); transform: translateY(-4px); }
.blog-card-img img { width: 100%; height: 200px; object-fit: cover; display: block; }
.blog-card-body { padding: 24px; }
.blog-category { display: inline-block; background: var(--accent-dim); color: var(--accent); padding: 4px 12px; border-radius: 4px; font-size: 0.75rem; font-weight: 600; margin-bottom: 10px; }
.blog-card-body h3 { font-size: 1.15rem; margin-bottom: 8px; line-height: 1.4; }
.blog-meta { color: var(--text-muted); font-size: 0.8rem; margin-bottom: 12px; }
.blog-card-body p { color: var(--text-muted); font-size: 0.9rem; line-height: 1.7; }

/* Responsive */
@media (max-width: 768px) {
    .hero h1 { font-size: 2.5rem; }
    .product-grid { grid-template-columns: 1fr; }
    .guide-grid { grid-template-columns: 1fr; }
    .blog-grid { grid-template-columns: 1fr; }
    .compare-table { font-size: 0.8rem; }
    .compare-table th, .compare-table td { padding: 10px 8px; }
    nav { gap: 14px; }
    nav a { font-size: 0.75rem; }
}