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

:root {
    --color-primary: #0A84FF;
    --color-primary-dark: #0066CC;
    --color-bg: #FFFFFF;
    --color-bg-alt: #F5F5F7;
    --color-bg-dark: #1D1D1F;
    --color-text: #1D1D1F;
    --color-text-light: #6E6E73;
    --color-text-muted: #86868B;
    --color-border: #D2D2D7;
    --color-border-light: #E8E8ED;
    --color-success: #34C759;

    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
    --max-width: 1080px;
    --radius: 12px;
    --radius-sm: 8px;
    --radius-lg: 20px;
    --shadow: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.12);
    --transition: 0.2s ease;
}

html { scroll-behavior: smooth; }

body {
    font-family: var(--font-sans);
    color: var(--color-text);
    line-height: 1.6;
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
}

/* Nav */
header {
    position: sticky;
    top: 0;
    background: rgba(255,255,255,0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border-light);
    z-index: 100;
}

nav {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0.75rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-text);
    text-decoration: none;
}

.logo-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background: var(--color-primary);
    color: white;
    border-radius: 7px;
    font-size: 0.75rem;
    font-weight: 800;
}

.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-links a {
    color: var(--color-text-light);
    text-decoration: none;
    font-size: 0.9375rem;
    font-weight: 500;
    transition: color var(--transition);
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.9375rem;
    text-decoration: none;
    transition: all var(--transition);
    cursor: pointer;
    border: none;
}

.btn-sm { padding: 0.5rem 1rem; font-size: 0.875rem; }
.btn-large { padding: 0.875rem 1.75rem; font-size: 1rem; border-radius: var(--radius); }

.btn-primary {
    background: var(--color-primary);
    color: #fff !important;
}

.btn-primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(10,132,255,0.3);
}

/* Layout */
main {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

section { padding: 5rem 0; }

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.15;
    margin-bottom: 0.75rem;
}

.section-header p {
    font-size: 1.125rem;
    color: var(--color-text-light);
}

/* Hero */
.hero {
    text-align: center;
    padding: 5rem 0 2rem;
}

.hero-badge {
    display: inline-block;
    padding: 0.4rem 1rem;
    background: var(--color-bg-alt);
    color: var(--color-text-light);
    border-radius: 100px;
    font-size: 0.8125rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    letter-spacing: 0.02em;
}

.hero h1 {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 800;
    line-height: 1.05;
    letter-spacing: -0.04em;
    margin-bottom: 1.5rem;
}

.gradient-text {
    background: linear-gradient(135deg, var(--color-primary), #5AC8FA);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-light);
    max-width: 580px;
    margin: 0 auto 2rem;
    line-height: 1.6;
}

.hero-subtitle strong {
    color: var(--color-text);
    font-weight: 700;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 2rem;
}

.hero-tech {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
}

.tech-badge {
    padding: 0.375rem 0.75rem;
    background: var(--color-bg-alt);
    border-radius: 100px;
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    font-weight: 500;
}

/* Phone Showcase */
.phone-showcase {
    display: flex;
    justify-content: center;
    padding: 2rem 0 4rem;
}

.phone-frame {
    width: 320px;
    background: var(--color-bg-dark);
    border-radius: 36px;
    padding: 12px;
    box-shadow: 0 24px 64px rgba(0,0,0,0.2);
}

.phone-screen {
    background: var(--color-bg-alt);
    border-radius: 26px;
    overflow: hidden;
    aspect-ratio: 9/16;
}

.mock-pipeline { padding: 1rem; }

.mock-header {
    font-size: 1.25rem;
    font-weight: 800;
    padding: 0.75rem 0;
    color: var(--color-text);
}

.mock-stages {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.mock-stage-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-light);
    padding-bottom: 0.375rem;
}

.mock-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    display: inline-block;
}

.mock-count {
    margin-left: auto;
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border-light);
    border-radius: 100px;
    padding: 0 0.375rem;
    font-size: 0.625rem;
}

.mock-card {
    background: white;
    border-radius: 10px;
    padding: 0.75rem;
    margin-bottom: 0.375rem;
    box-shadow: 0 1px 2px rgba(0,0,0,0.04);
}

.mock-card.highlight {
    border: 1.5px solid var(--color-primary);
}

.mock-card-title {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--color-text);
}

.mock-card-value {
    font-size: 0.75rem;
    color: var(--color-text-light);
    margin-top: 0.125rem;
}

.mock-card-badge {
    display: inline-block;
    margin-top: 0.375rem;
    font-size: 0.625rem;
    font-weight: 600;
    background: rgba(10,132,255,0.1);
    color: var(--color-primary);
    padding: 0.125rem 0.5rem;
    border-radius: 100px;
}

/* Features */
.features { background: var(--color-bg); }

.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.feature-card {
    background: var(--color-bg);
    padding: 1.75rem;
    border-radius: var(--radius);
    border: 1px solid var(--color-border-light);
    transition: all var(--transition);
}

.feature-card:hover {
    border-color: var(--color-border);
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.feature-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: var(--color-bg-alt);
    border-radius: var(--radius-sm);
    color: var(--color-primary);
    margin-bottom: 1rem;
}

.feature-card h3 {
    font-size: 1.0625rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.feature-card p {
    color: var(--color-text-light);
    font-size: 0.9375rem;
    line-height: 1.55;
}

/* AI Section */
.ai-section {
    background: var(--color-bg-dark);
    margin: 0 -1.5rem;
    padding: 5rem 1.5rem;
    color: white;
}

.ai-section .section-header h2 { color: white; }
.ai-section .section-header p { color: rgba(255,255,255,0.6); }

.ai-grid {
    max-width: var(--max-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.ai-card {
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: var(--radius);
    padding: 1.75rem;
    transition: all var(--transition);
}

.ai-card:hover {
    background: rgba(255,255,255,0.1);
    border-color: rgba(255,255,255,0.2);
}

.ai-label {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-primary);
    margin-bottom: 0.75rem;
}

.ai-card h3 {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: white;
}

.ai-card p {
    font-size: 0.9375rem;
    color: rgba(255,255,255,0.6);
    line-height: 1.55;
}

/* Pricing */
.pricing { text-align: center; }

.price-card {
    max-width: 400px;
    margin: 0 auto 3rem;
    background: var(--color-bg);
    border: 2px solid var(--color-primary);
    border-radius: var(--radius-lg);
    padding: 2.5rem;
    text-align: center;
}

.price-badge {
    display: inline-block;
    padding: 0.375rem 0.875rem;
    background: rgba(10,132,255,0.1);
    color: var(--color-primary);
    border-radius: 100px;
    font-size: 0.8125rem;
    font-weight: 600;
    margin-bottom: 1.25rem;
}

.price-amount {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 0.25rem;
    margin-bottom: 1.5rem;
}

.price-currency {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
}

.price-number {
    font-size: 4rem;
    font-weight: 800;
    letter-spacing: -0.04em;
    line-height: 1;
    color: var(--color-text);
}

.price-period {
    font-size: 1.125rem;
    color: var(--color-text-muted);
    font-weight: 500;
}

.price-features {
    list-style: none;
    text-align: left;
    margin-bottom: 1.75rem;
}

.price-features li {
    padding: 0.5rem 0;
    padding-left: 1.75rem;
    position: relative;
    font-size: 0.9375rem;
    color: var(--color-text-light);
    border-bottom: 1px solid var(--color-border-light);
}

.price-features li:last-child { border-bottom: none; }

.price-features li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 18px;
    height: 18px;
    background: var(--color-success);
    border-radius: 50%;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3'%3E%3Cpolyline points='20 6 9 17 4 12'%3E%3C/polyline%3E%3C/svg%3E");
    background-size: 12px;
    background-repeat: no-repeat;
    background-position: center;
}

.price-note {
    margin-top: 0.75rem;
    font-size: 0.8125rem;
    color: var(--color-text-muted);
}

/* Comparison */
.comparison {
    max-width: 640px;
    margin: 0 auto;
}

.comparison h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 1.25rem;
}

.comparison-table {
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius);
    overflow: hidden;
}

.comparison-row {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    text-align: center;
}

.comparison-row span {
    padding: 0.75rem 1rem;
    font-size: 0.875rem;
    border-bottom: 1px solid var(--color-border-light);
}

.comparison-row:last-child span { border-bottom: none; }

.comparison-row span:first-child {
    text-align: left;
    font-weight: 500;
    color: var(--color-text);
}

.comparison-row span:not(:first-child) {
    color: var(--color-text-light);
}

.comparison-row.header span {
    background: var(--color-bg-alt);
    font-weight: 600;
    color: var(--color-text);
    font-size: 0.8125rem;
}

.comparison-row span.highlight {
    color: var(--color-primary);
    font-weight: 600;
}

/* CTA Section */
.cta-section {
    text-align: center;
    padding: 5rem 0;
}

.cta-section h2 {
    font-size: 2.5rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    margin-bottom: 0.75rem;
}

.cta-section p {
    font-size: 1.125rem;
    color: var(--color-text-light);
    margin-bottom: 2rem;
}

/* Footer */
footer {
    background: var(--color-bg-alt);
    border-top: 1px solid var(--color-border-light);
    padding: 3rem 1.5rem;
}

.footer-content {
    max-width: var(--max-width);
    margin: 0 auto;
    text-align: center;
}

.footer-brand {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 0.5rem;
}

.footer-brand .logo-icon {
    width: 24px;
    height: 24px;
    font-size: 0.625rem;
}

footer p {
    color: var(--color-text-light);
    font-size: 0.875rem;
    margin-bottom: 1rem;
}

.footer-links {
    display: flex;
    gap: 2rem;
    justify-content: center;
}

.footer-links a {
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: 0.8125rem;
    transition: color var(--transition);
}

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

/* Scroll animations */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.feature-grid .feature-card.fade-in:nth-child(1) { transition-delay: 0ms; }
.feature-grid .feature-card.fade-in:nth-child(2) { transition-delay: 50ms; }
.feature-grid .feature-card.fade-in:nth-child(3) { transition-delay: 100ms; }
.feature-grid .feature-card.fade-in:nth-child(4) { transition-delay: 150ms; }
.feature-grid .feature-card.fade-in:nth-child(5) { transition-delay: 200ms; }
.feature-grid .feature-card.fade-in:nth-child(6) { transition-delay: 250ms; }

/* Responsive */
@media (max-width: 768px) {
    .hero h1 { font-size: 2.25rem; }
    .section-header h2 { font-size: 1.75rem; }
    .cta-section h2 { font-size: 1.75rem; }
    .nav-links > a:not(.btn) { display: none; }

    .feature-grid,
    .ai-grid {
        grid-template-columns: 1fr;
    }

    .comparison-row {
        grid-template-columns: 1.5fr 1fr 1fr 1fr;
        font-size: 0.75rem;
    }

    .comparison-row span {
        padding: 0.625rem 0.5rem;
        font-size: 0.75rem;
    }

    .phone-frame { width: 260px; }
}

@media (max-width: 480px) {
    nav { padding: 0.75rem 1rem; }
    main { padding: 0 1rem; }
    .ai-section { margin: 0 -1rem; padding: 4rem 1rem; }
}

/* Header scroll */
header.scrolled {
    box-shadow: 0 1px 3px rgba(0,0,0,0.06);
}