/* ===== Reset & Base ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
    --bg: #0a0a0a;
    --bg-elevated: #141414;
    --bg-card: #1a1a1a;
    --text: #f5f5f5;
    --text-secondary: #999;
    --accent: #D0FF00;
    --accent-dim: rgba(208, 255, 0, 0.12);
    --radius: 16px;
    --radius-sm: 10px;
    --max-width: 1080px;
}

html { scroll-behavior: smooth; }

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

h1, h2, h3 { line-height: 1.2; }

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 28px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    transition: transform 0.15s, box-shadow 0.15s;
    cursor: pointer;
    border: none;
}

.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn-primary {
    background: var(--accent);
    color: #0a0a0a;
    box-shadow: 0 4px 24px rgba(208, 255, 0, 0.25);
}
.btn-primary:hover {
    box-shadow: 0 8px 32px rgba(208, 255, 0, 0.35);
}

.btn-lg {
    padding: 18px 36px;
    font-size: 1.1rem;
    border-radius: var(--radius);
}

/* ===== Hero ===== */
.hero {
    padding: 100px 0 80px;
    min-height: 90vh;
    display: flex;
    align-items: center;
}

.hero .container {
    display: flex;
    align-items: center;
    gap: 64px;
}

.hero-content { flex: 1; }

.hero-badge {
    display: inline-block;
    padding: 6px 14px;
    border-radius: 100px;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    background: var(--accent-dim);
    color: var(--accent);
    margin-bottom: 24px;
}

.hero h1 {
    font-size: clamp(2.8rem, 6vw, 4.5rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    margin-bottom: 20px;
}

.hero-tagline {
    font-size: clamp(1.2rem, 2.5vw, 1.5rem);
    color: var(--text-secondary);
    margin-bottom: 16px;
    font-weight: 500;
}

.hero-sub {
    font-size: 1.05rem;
    color: var(--text-secondary);
    max-width: 480px;
    margin-bottom: 36px;
}

.hero-visual {
    flex-shrink: 0;
}

.hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

/* Phone mockup */
.phone-frame {
    width: 280px;
    height: 560px;
    border-radius: 40px;
    border: 3px solid #333;
    background: #111;
    padding: 12px;
    position: relative;
    box-shadow: 0 24px 80px rgba(0,0,0,0.5);
}

.phone-screen {
    width: 100%;
    height: 100%;
    border-radius: 30px;
    background: #1a1a1a;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.screen-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

/* ===== Features ===== */
.features {
    padding: 100px 0;
    background: var(--bg-elevated);
}

.features h2 {
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    text-align: center;
    margin-bottom: 60px;
    letter-spacing: -0.02em;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.feature-card {
    padding: 32px;
    border-radius: var(--radius);
    background: var(--bg-card);
    border: 1px solid #222;
    transition: border-color 0.2s, transform 0.2s;
}

.feature-card:hover {
    border-color: #333;
    transform: translateY(-4px);
}

.feature-icon {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    background: var(--accent-dim);
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 1.15rem;
    margin-bottom: 10px;
    font-weight: 600;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ===== Highlights ===== */
.highlights {
    padding: 80px 0;
}

.highlights-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    text-align: center;
}

.highlight-number {
    display: block;
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    color: var(--accent);
    letter-spacing: -0.03em;
}

.highlight-label {
    display: block;
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-top: 4px;
}

/* ===== FAQ ===== */
.faq {
    padding: 100px 0;
}

.faq h2 {
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    text-align: center;
    margin-bottom: 48px;
    letter-spacing: -0.02em;
}

.faq-list {
    max-width: 720px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.faq-item {
    background: var(--bg-card);
    border: 1px solid #222;
    border-radius: var(--radius);
    overflow: hidden;
    transition: border-color 0.2s;
}

.faq-item[open] { border-color: #333; }

.faq-item summary {
    padding: 20px 24px;
    font-weight: 600;
    font-size: 1.05rem;
    cursor: pointer;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-item summary::-webkit-details-marker { display: none; }

.faq-item summary::after {
    content: "+";
    font-size: 1.3rem;
    color: var(--accent);
    font-weight: 400;
    flex-shrink: 0;
    margin-left: 16px;
    transition: transform 0.2s;
}

.faq-item[open] summary::after {
    transform: rotate(45deg);
}

.faq-item p {
    padding: 0 24px 20px;
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* ===== CTA ===== */
.cta {
    padding: 100px 0;
    text-align: center;
    background: var(--bg-elevated);
}

.cta h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: 12px;
    letter-spacing: -0.02em;
}

.cta p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 36px;
}

/* ===== Footer ===== */
.footer {
    padding: 40px 0;
    border-top: 1px solid #1a1a1a;
}

.footer .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}

.footer-content {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.footer-brand {
    font-weight: 600;
    color: var(--text);
}

.footer-links {
    display: flex;
    gap: 24px;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.15s;
}

.footer-links a:hover { color: var(--text); }

/* ===== Responsive ===== */
@media (max-width: 900px) {
    .features-grid { grid-template-columns: repeat(2, 1fr); }
    .hero .container { flex-direction: column; text-align: center; }
    .hero-sub { margin-left: auto; margin-right: auto; }
    .hero-actions { justify-content: center; }
}

@media (max-width: 600px) {
    .features-grid { grid-template-columns: 1fr; }
    .highlights-grid { grid-template-columns: repeat(2, 1fr); }
    .phone-frame { width: 220px; height: 440px; border-radius: 32px; }
    .phone-screen { border-radius: 24px; }
    .hero { padding: 60px 0 40px; min-height: auto; }
    .features, .cta { padding: 60px 0; }
}