:root {
    --bg: #0a0a0f;
    --bg-elevated: #12121a;
    --text: #f4f4f5;
    --text-muted: #a1a1aa;
    --accent: #22d3ee;
    --accent-dim: #06b6d4;
    --gradient-start: #22d3ee;
    --gradient-end: #a855f7;
    --border: rgba(255,255,255,0.08);
    --card: #16161f;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 1rem 1.5rem;
    background: rgba(10,10,15,0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
}

.nav {
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text);
    text-decoration: none;
    letter-spacing: -0.02em;
}

.nav-cta {
    padding: 0.6rem 1.2rem;
    background: var(--accent);
    color: var(--bg);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    border-radius: 8px;
    transition: all 0.2s;
}

.nav-cta:hover {
    background: var(--accent-dim);
    transform: translateY(-1px);
}

/* Hero */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 7rem 1.5rem 4rem;
    position: relative;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 80% 50% at 50% -20%, rgba(34,211,238,0.15), transparent),
        radial-gradient(ellipse 60% 40% at 100% 50%, rgba(168,85,247,0.08), transparent),
        radial-gradient(ellipse 60% 40% at 0% 80%, rgba(34,211,238,0.06), transparent);
    pointer-events: none;
}

.hero-content {
    max-width: 640px;
    text-align: center;
    position: relative;
}

.hero-badge {
    display: inline-block;
    padding: 0.35rem 0.9rem;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 999px;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

.hero h1 {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 1.25rem;
}

.gradient-text {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-sub {
    font-size: 1.15rem;
    color: var(--text-muted);
    max-width: 520px;
    margin: 0 auto 2rem;
}

.cta-primary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    color: var(--bg);
    text-decoration: none;
    font-weight: 700;
    font-size: 1.1rem;
    border-radius: 12px;
    transition: all 0.2s;
    box-shadow: 0 4px 24px rgba(34,211,238,0.25);
}

.cta-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(34,211,238,0.35);
}

.hero-note {
    margin-top: 1.25rem;
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* Hero visual - mock chat */
.hero-visual {
    display: none;
}

@media (min-width: 900px) {
    .hero {
        flex-direction: row;
        gap: 4rem;
        padding-top: 6rem;
    }
    .hero-content {
        text-align: left;
    }
    .hero-sub {
        margin-left: 0;
        margin-right: 0;
    }
    .hero-visual {
        display: block;
        flex-shrink: 0;
    }
    .mock-chat {
        width: 360px;
        background: var(--card);
        border: 1px solid var(--border);
        border-radius: 16px;
        overflow: hidden;
        box-shadow: 0 24px 48px rgba(0,0,0,0.4);
    }
    .mock-header {
        display: flex;
        align-items: center;
        gap: 0.5rem;
        padding: 1rem 1.25rem;
        border-bottom: 1px solid var(--border);
    }
    .mock-dot {
        width: 10px;
        height: 10px;
        border-radius: 50%;
        background: var(--text-muted);
        opacity: 0.5;
    }
    .mock-label {
        margin-left: auto;
        font-family: 'JetBrains Mono', monospace;
        font-size: 0.75rem;
        color: var(--text-muted);
    }
    .mock-messages {
        padding: 1.25rem;
        display: flex;
        flex-direction: column;
        gap: 1rem;
    }
    .mock-msg {
        padding: 0.85rem 1rem;
        border-radius: 12px;
        font-size: 0.9rem;
    }
    .mock-user {
        background: var(--accent);
        color: var(--bg);
        align-self: flex-end;
        max-width: 85%;
    }
    .mock-bot {
        background: var(--bg-elevated);
        border: 1px solid var(--border);
        color: var(--text-muted);
        max-width: 90%;
    }
}

/* How it works */
.how-it-works {
    padding: 5rem 1.5rem;
    max-width: 900px;
    margin: 0 auto;
}

.how-it-works h2 {
    font-size: 2rem;
    font-weight: 800;
    text-align: center;
    margin-bottom: 3rem;
}

.steps {
    display: grid;
    gap: 2.5rem;
}

@media (min-width: 640px) {
    .steps {
        grid-template-columns: repeat(3, 1fr);
        gap: 2rem;
    }
}

.step {
    padding: 2rem;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 16px;
}

.step-num {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    color: var(--bg);
    font-weight: 800;
    font-size: 1.25rem;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.25rem;
}

.step h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.step p {
    font-size: 0.95rem;
    color: var(--text-muted);
}

/* Benefits */
.benefits {
    padding: 5rem 1.5rem;
    background: var(--bg-elevated);
}

.benefits h2 {
    font-size: 2rem;
    font-weight: 800;
    text-align: center;
    margin-bottom: 3rem;
}

.benefit-grid {
    max-width: 1000px;
    margin: 0 auto;
    display: grid;
    gap: 1.5rem;
}

@media (min-width: 640px) {
    .benefit-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.benefit {
    padding: 2rem;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 16px;
}

.benefit-icon {
    font-size: 2rem;
    display: block;
    margin-bottom: 1rem;
}

.benefit h4 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.benefit p {
    font-size: 0.95rem;
    color: var(--text-muted);
}

/* CTA section */
.cta-section {
    padding: 5rem 1.5rem;
    text-align: center;
}

.cta-section h2 {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
}

.cta-section p {
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

.cta-secondary {
    display: inline-flex;
    padding: 1rem 2rem;
    background: transparent;
    color: var(--accent);
    border: 2px solid var(--accent);
    text-decoration: none;
    font-weight: 700;
    font-size: 1rem;
    border-radius: 12px;
    transition: all 0.2s;
}

.cta-secondary:hover {
    background: var(--accent);
    color: var(--bg);
    transform: translateY(-2px);
}

/* Footer */
.footer {
    padding: 2rem 1.5rem;
    text-align: center;
    border-top: 1px solid var(--border);
}

.footer p {
    font-size: 0.9rem;
    color: var(--text-muted);
}