/* RESET & BASE */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
    --bg: #0a0a0f;
    --bg-dark: #050508;
    --bg-card: #12121a;
    --bg-card-hover: #1a1a25;
    --text: #ececec;
    --text-dim: #a5a5ad;
    --accent: #f59e0b;
    --accent-dim: #d97706;
    --green: #22c55e;
    --red: #ef4444;
    --border: #222;
    --radius: 12px;
}

html { scroll-behavior: smooth; }

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    font-size: 17px;
}

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

img { max-width: 100%; display: block; }

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* NAV */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(10, 10, 15, 0.9);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    padding: 16px 0;
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--accent);
    letter-spacing: -0.02em;
}

.nav-links { display: flex; gap: 32px; align-items: center; }
.nav-links a { color: var(--text-dim); font-size: 0.9rem; transition: color 0.2s; }
.nav-links a:hover { color: var(--text); }

.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text);
    font-size: 1.5rem;
    cursor: pointer;
}

/* BUTTONS */
.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.2s;
    border: 2px solid transparent;
}

.btn-sm { padding: 8px 20px; font-size: 0.85rem; }
.btn-lg { padding: 16px 36px; font-size: 1.1rem; }
.btn-block { width: 100%; text-align: center; }

.btn-primary {
    background: var(--accent);
    color: #000;
}
.btn-primary:hover { background: var(--accent-dim); color: #000; }

.btn-outline {
    background: transparent;
    border-color: var(--border);
    color: var(--text);
}
.btn-outline:hover { border-color: var(--accent); color: var(--accent); }

/* BADGES */
.badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    background: var(--accent);
    color: #000;
    margin-right: 8px;
}

.badge-featured { background: var(--green); }
.badge-red { background: var(--red); color: #fff; }
.badge-green { background: var(--green); color: #000; }

/* HERO */
.hero {
    padding: 160px 0 100px;
    background: radial-gradient(ellipse at 30% 50%, rgba(245, 158, 11, 0.08) 0%, transparent 60%);
}

.hero-inner {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero h1 {
    font-size: 3.2rem;
    line-height: 1.15;
    letter-spacing: -0.03em;
    margin: 16px 0 20px;
}

.hero h1 em {
    font-style: normal;
    color: var(--accent);
}

.hero-sub {
    font-size: 1.15rem;
    color: var(--text-dim);
    margin-bottom: 32px;
    max-width: 540px;
}

.hero-ctas { display: flex; gap: 16px; margin-bottom: 48px; }

.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.stat { text-align: center; }
.stat strong { display: block; font-size: 1.5rem; color: var(--accent); white-space: nowrap; }
.stat span { font-size: 0.8rem; color: var(--text-dim); }

/* PRODUCT CARD */
.product-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 48px;
    text-align: center;
}

.product-box {
    display: flex;
    justify-content: center;
    gap: 32px;
    margin-bottom: 24px;
}

.led-group { display: flex; flex-direction: column; align-items: center; gap: 8px; }

.led {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    border: 2px solid rgba(255,255,255,0.1);
}

.led-green {
    background: var(--green);
    box-shadow: 0 0 20px rgba(34, 197, 94, 0.5);
    animation: pulse-green 2s ease-in-out infinite;
}

.led-red {
    background: #333;
}

.led-red.active {
    background: var(--red);
    box-shadow: 0 0 20px rgba(239, 68, 68, 0.5);
    animation: pulse-red 0.5s ease-in-out infinite;
}

@keyframes pulse-green {
    0%, 100% { box-shadow: 0 0 10px rgba(34, 197, 94, 0.3); }
    50% { box-shadow: 0 0 25px rgba(34, 197, 94, 0.6); }
}

@keyframes pulse-red {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

.product-label { font-size: 1.3rem; font-weight: 700; letter-spacing: 0.05em; }
.product-sublabel { font-size: 0.9rem; color: var(--text-dim); margin-top: 4px; }

/* SECTIONS */
.section { padding: 100px 0; }
.section-dark { background: var(--bg-dark); }
.section-cta {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.1) 0%, rgba(245, 158, 11, 0.02) 100%);
    text-align: center;
    padding: 80px 0;
}

.section-title {
    font-size: 2.2rem;
    text-align: center;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.section-subtitle {
    text-align: center;
    color: var(--text-dim);
    margin-bottom: 48px;
    font-size: 1.1rem;
}

/* PROBLEM GRID */
.problem-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 48px;
}

.problem-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
    text-align: center;
}

.problem-icon { font-size: 2.5rem; margin-bottom: 16px; }
.problem-card h3 { margin-bottom: 12px; }
.problem-card p { color: var(--text-dim); font-size: 0.95rem; margin-bottom: 16px; }
.problem-badge { font-size: 0.7rem; }

/* FEATURES */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 48px;
}

.feature {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
    transition: border-color 0.2s;
}

.feature:hover { border-color: var(--accent); }
.feature-icon { font-size: 2rem; margin-bottom: 16px; }
.feature h3 { margin-bottom: 8px; }
.feature p { color: var(--text-dim); font-size: 0.95rem; }

/* STEPS */
.steps {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-top: 48px;
    flex-wrap: wrap;
}

.step {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px 24px;
    text-align: center;
    flex: 1;
    min-width: 180px;
    max-width: 220px;
}

.step-num {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--accent);
    color: #000;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
}

.step h3 { margin-bottom: 8px; font-size: 1rem; }
.step p { color: var(--text-dim); font-size: 0.85rem; }

.step-arrow {
    font-size: 1.5rem;
    color: var(--accent);
    flex-shrink: 0;
}

/* SPECS */
.specs-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    margin-top: 48px;
}

.spec-group {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
}

.spec-group h3 { margin-bottom: 16px; color: var(--accent); font-size: 1rem; }

.spec-table { width: 100%; }
.spec-table td {
    padding: 8px 0;
    border-bottom: 1px solid var(--border);
    font-size: 0.95rem;
}
.spec-table td:first-child { color: var(--text-dim); }
.spec-table td:last-child { text-align: right; font-weight: 500; }

/* COMPARISON */
.comparison-wrapper {
    overflow-x: auto;
    margin-top: 48px;
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.95rem;
}

.comparison-table th,
.comparison-table td {
    padding: 14px 20px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.comparison-table th {
    color: var(--text-dim);
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.comparison-table .highlight {
    background: rgba(245, 158, 11, 0.08);
    color: var(--accent);
}

/* USE CASES */
.use-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 48px;
}

.use-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    text-align: center;
}

.use-icon { font-size: 2.5rem; margin-bottom: 16px; }
.use-card h3 { margin-bottom: 8px; }
.use-card p { color: var(--text-dim); font-size: 0.9rem; }

/* PRICING */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 48px;
    align-items: start;
}

.price-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 36px 28px;
    text-align: center;
    position: relative;
}

.price-card-featured {
    border-color: var(--accent);
    background: rgba(245, 158, 11, 0.05);
}

.price-card h3 { font-size: 1.1rem; margin-bottom: 8px; }
.price { font-size: 2.5rem; font-weight: 700; color: var(--accent); margin-bottom: 24px; }
.price-card ul { list-style: none; margin-bottom: 28px; text-align: left; }
.price-card li { padding: 8px 0; border-bottom: 1px solid var(--border); font-size: 0.95rem; color: var(--text); }
.price-card li::before { content: "✓ "; color: var(--green); font-weight: 700; }

.coming-soon-note {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    padding-top: 8px;
}

/* FAQ */
.faq-list { max-width: 800px; margin: 48px auto 0; }

.faq-item {
    border-bottom: 1px solid var(--border);
}

.faq-question {
    width: 100%;
    background: none;
    border: none;
    color: var(--text);
    font-size: 1.05rem;
    font-weight: 600;
    padding: 20px 0;
    cursor: pointer;
    text-align: left;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-question::after {
    content: "+";
    font-size: 1.3rem;
    color: var(--accent);
    transition: transform 0.2s;
}

.faq-item.open .faq-question::after {
    content: "−";
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-item.open .faq-answer {
    max-height: 200px;
}

.faq-answer p {
    padding: 0 0 20px;
    color: var(--text-dim);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* CTA */
.section-cta h2 { font-size: 2rem; margin-bottom: 12px; }
.section-cta p { color: var(--text-dim); margin-bottom: 28px; font-size: 1.05rem; }
.cta-note { font-size: 0.85rem; margin-top: 16px; }

/* FOOTER */
.footer {
    border-top: 1px solid var(--border);
    padding: 48px 0 32px;
}

.footer-inner {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: 40px;
}

.footer-brand p { color: var(--text-dim); font-size: 0.9rem; margin-top: 8px; }
.footer-links { display: flex; flex-direction: column; gap: 12px; }
.footer-links a { color: var(--text-dim); font-size: 0.9rem; }
.footer-links a:hover { color: var(--text); }
.footer-legal p { font-size: 0.8rem; color: var(--text-dim); margin-bottom: 4px; }

/* MOBILE */
@media (max-width: 900px) {
    .nav-links { display: none; }
    .menu-toggle { display: block; }
    .hero-inner { grid-template-columns: 1fr; gap: 40px; }
    .hero h1 { font-size: 2.2rem; }
    .hero-stats { grid-template-columns: repeat(2, 1fr); }
    .problem-grid,
    .features-grid,
    .use-grid,
    .pricing-grid { grid-template-columns: 1fr; }
    .specs-grid { grid-template-columns: 1fr; }
    .footer-inner { grid-template-columns: 1fr; gap: 24px; }
    .steps { flex-direction: column; }
    .step-arrow { transform: rotate(90deg); }
}

@media (max-width: 600px) {
    .hero { padding: 120px 0 60px; }
    .hero h1 { font-size: 1.8rem; }
    .hero-ctas { flex-direction: column; }
    .section { padding: 60px 0; }
}