/* ===== DESIGN.md Tokens → CSS Variables ===== */
:root {
    /* Colors — strictly monochrome */
    --bg-primary:        #0a0a0a;
    --bg-secondary:      #111111;
    --bg-card:           #1a1a1a;
    --bg-elevated:       #222222;
    --border-subtle:     rgba(255, 255, 255, 0.06);
    --border-default:    rgba(255, 255, 255, 0.12);
    --text-primary:      #f5f5f5;
    --text-secondary:    #a3a3a3;
    --text-tertiary:     #737373;
    --accent:            #ffffff;
    --accent-hover:      #e5e5e5;
    --accent-text:       #0a0a0a;

    /* Gradients (grayscale only) */
    --gradient-spotlight: radial-gradient(ellipse at 50% -20%, rgba(255,255,255,0.08) 0%, transparent 70%);

    /* Spacing */
    --section-padding:   100px;
    --container-max:     1200px;
    --border-radius:     8px;
    --card-radius:       12px;

    /* Transitions */
    --transition:        all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow:   all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    font-size: 16px;
}

/* ===== Utilities ===== */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
    width: 100%;
}

.section-title {
    font-size: clamp(1.75rem, 4vw, 2.75rem);
    font-weight: 700;
    color: var(--text-primary);
    text-align: center;
    margin-bottom: 16px;
    letter-spacing: -0.03em;
    line-height: 1.2;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    text-align: center;
    max-width: 560px;
    margin: 0 auto 60px;
    line-height: 1.6;
}

/* ===== Navbar ===== */
.navbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    background: rgba(10, 10, 10, 0.75);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--border-subtle);
    padding: 0 24px;
    height: 64px;
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(10, 10, 10, 0.95);
}

.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.logo {
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--accent);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 10px;
    letter-spacing: -0.02em;
    transition: var(--transition);
}

.logo:hover {
    color: var(--text-primary);
}

.logo-img {
    width: 28px;
    height: 28px;
    object-fit: contain;
    filter: grayscale(100%) brightness(10);
    opacity: 0.9;
}

.logo-fallback {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.logo-fallback svg {
    flex-shrink: 0;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 32px;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9375rem;
    transition: var(--transition);
    position: relative;
    padding: 4px 0;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -2px; left: 0;
    width: 0; height: 1px;
    background: var(--accent);
    transition: var(--transition);
}

.nav-links a:hover {
    color: var(--text-primary);
}
.nav-links a:hover::after {
    width: 100%;
}

.nav-cta {
    padding: 10px 22px !important;
    font-size: 0.875rem !important;
}

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 1001;
}
.mobile-toggle span {
    display: block;
    width: 22px; height: 1.5px;
    background: var(--text-primary);
    transition: var(--transition);
}

.mobile-menu {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: var(--bg-primary);
    z-index: 999;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 32px;
}
.mobile-menu.active { display: flex; }
.mobile-menu a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 1.5rem;
    font-weight: 600;
    transition: var(--transition);
}
.mobile-menu a:hover { color: var(--text-primary); }
.mobile-menu .btn { font-size: 1.125rem; }

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: var(--border-radius);
    font-size: 0.9375rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    border: none;
    transition: var(--transition);
    font-family: inherit;
    line-height: 1;
    white-space: nowrap;
}

.btn-primary {
    background: var(--accent);
    color: var(--accent-text);
    box-shadow: 0 0 0 rgba(255,255,255,0);
}
.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(255,255,255,0.12);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-default);
}
.btn-secondary:hover {
    border-color: rgba(255,255,255,0.4);
    background: rgba(255,255,255,0.05);
    transform: translateY(-2px);
}

.btn-lg {
    padding: 18px 44px;
    font-size: 1.0625rem;
    border-radius: 10px;
}

/* ===== Hero Section ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 120px 20px 80px;
    background: var(--bg-primary);
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--gradient-spotlight);
    pointer-events: none;
    z-index: 0;
}

.hero::after {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 20% 80%, rgba(255,255,255,0.02) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255,255,255,0.02) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

.hero-content {
    text-align: center;
    z-index: 2;
    position: relative;
    max-width: 800px;
}

.hero-badge {
    display: inline-block;
    padding: 6px 16px;
    border: 1px solid var(--border-default);
    border-radius: 100px;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 28px;
    background: var(--bg-card);
    letter-spacing: 0.01em;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 24px;
    line-height: 1.08;
    letter-spacing: -0.04em;
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--text-secondary);
    max-width: 620px;
    margin: 0 auto 40px;
    line-height: 1.7;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.hero-stats {
    display: flex;
    gap: 48px;
    margin-top: 60px;
    padding-top: 40px;
    border-top: 1px solid var(--border-subtle);
    justify-content: center;
}

.stat {
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.stat strong {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.stat span {
    font-size: 0.8125rem;
    color: var(--text-tertiary);
}

/* ===== Trusted By ===== */
.trusted-by {
    padding: 40px 20px;
    border-top: 1px solid var(--border-subtle);
    border-bottom: 1px solid var(--border-subtle);
    background: var(--bg-secondary);
}

.trusted-by-label {
    font-size: 0.8125rem;
    color: var(--text-tertiary);
    text-align: center;
    margin-bottom: 24px;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.logo-strip {
    display: flex;
    gap: 48px;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
}

.trusted-logo {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-tertiary);
    letter-spacing: 0.02em;
    user-select: none;
}

/* ===== Benefit Section ===== */
.benefit {
    padding: var(--section-padding) 20px;
    background: var(--bg-primary);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
}

.benefit-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--card-radius);
    padding: 36px 32px;
    transition: var(--transition);
    position: relative;
}

.benefit-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-default);
    box-shadow: 0 12px 40px rgba(0,0,0,0.4);
}

.benefit-card::after {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: rgba(255,255,255,0.1);
    transition: var(--transition);
}

.benefit-card:hover::after {
    background: rgba(255,255,255,0.3);
}

.benefit-icon-wrap {
    width: 48px; height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-default);
    border-radius: var(--border-radius);
    margin-bottom: 20px;
    background: var(--bg-elevated);
}

.benefit-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 10px;
    letter-spacing: -0.01em;
}

.benefit-card p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    line-height: 1.65;
}

/* ===== How It Works ===== */
.how-it-works {
    padding: var(--section-padding) 20px;
    background: var(--bg-secondary);
}

.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 32px;
    max-width: 900px;
    margin: 0 auto;
}

.step {
    text-align: center;
    position: relative;
}

.step-number {
    font-size: 3rem;
    font-weight: 800;
    color: var(--accent);
    opacity: 0.12;
    letter-spacing: -0.04em;
    line-height: 1;
    margin-bottom: 12px;
}

.step h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
    letter-spacing: -0.01em;
}

.step p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    line-height: 1.6;
}

/* ===== Pricing ===== */
.pricing {
    padding: var(--section-padding) 20px;
    background: var(--bg-primary);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
    max-width: 1020px;
    margin: 0 auto;
}

.pricing-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--card-radius);
    padding: 36px 32px;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    position: relative;
}

.pricing-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-default);
    box-shadow: 0 12px 40px rgba(0,0,0,0.4);
}

.pricing-card.popular {
    border-color: rgba(255,255,255,0.25);
    background: var(--bg-elevated);
}

.pricing-badge {
    display: inline-block;
    padding: 4px 14px;
    background: var(--accent);
    color: var(--accent-text);
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.03em;
    margin-bottom: 16px;
    align-self: flex-start;
    text-transform: uppercase;
}

.pricing-name {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

.pricing-price {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--text-primary);
    margin: 8px 0 4px;
    letter-spacing: -0.03em;
}

.pricing-price span {
    font-size: 1rem;
    font-weight: 400;
    color: var(--text-tertiary);
}

.pricing-desc {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    margin-bottom: 24px;
    line-height: 1.5;
}

.pricing-features {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 32px;
    flex-grow: 1;
}

.pricing-features li {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    padding-left: 20px;
    position: relative;
}

.pricing-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: 700;
}

.pricing-card .btn {
    width: 100%;
    justify-content: center;
}

/* ===== FAQ ===== */
.faq {
    padding: var(--section-padding) 20px;
    background: var(--bg-secondary);
}

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

.faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: var(--transition);
}

.faq-item.active {
    border-color: var(--border-default);
}

.faq-question {
    width: 100%;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 600;
    padding: 20px 24px;
    text-align: left;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-family: inherit;
    transition: var(--transition);
    letter-spacing: -0.01em;
}

.faq-question:hover {
    color: var(--accent);
}

.faq-question::after {
    content: '+';
    font-size: 1.25rem;
    font-weight: 400;
    color: var(--text-tertiary);
    transition: var(--transition);
    flex-shrink: 0;
}

.faq-item.active .faq-question::after {
    content: '−';
    color: var(--accent);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s;
}

.faq-answer p {
    padding: 0 24px 20px;
    color: var(--text-secondary);
    font-size: 0.9375rem;
    line-height: 1.7;
}

/* ===== CTA Section ===== */
.cta {
    padding: var(--section-padding) 20px;
    background: var(--bg-primary);
    position: relative;
    overflow: hidden;
}

.cta::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--gradient-spotlight);
    pointer-events: none;
}

.cta-content {
    text-align: center;
    position: relative;
    z-index: 2;
}

.cta-title {
    font-size: clamp(1.5rem, 3.5vw, 2.25rem);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
    letter-spacing: -0.03em;
}

.cta-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.cta-note {
    font-size: 0.8125rem;
    color: var(--text-tertiary);
    margin-top: 16px;
}

/* ===== Footer ===== */
.footer {
    padding: 80px 20px 40px;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-subtle);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr repeat(3, 1fr);
    gap: 48px;
    max-width: var(--container-max);
    margin: 0 auto;
}

.footer-col {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-logo {
    margin-bottom: 8px;
}

.footer-col h4 {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: 0.03em;
    text-transform: uppercase;
    margin-bottom: 4px;
}

.footer-col a {
    color: var(--text-tertiary);
    text-decoration: none;
    font-size: 0.9375rem;
    transition: var(--transition);
}

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

.footer-col p {
    color: var(--text-tertiary);
    font-size: 0.9375rem;
    line-height: 1.6;
    max-width: 260px;
}

.footer-bottom {
    max-width: var(--container-max);
    margin: 60px auto 0;
    padding-top: 32px;
    border-top: 1px solid var(--border-subtle);
}

.footer-bottom p {
    text-align: center;
    color: var(--text-tertiary);
    font-size: 0.8125rem;
}

/* ===== Animations — Scroll Reveal ===== */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: var(--transition-slow);
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 40px;
    }
}

@media (max-width: 768px) {
    .nav-links, .nav-cta {
        display: none;
    }
    .mobile-toggle {
        display: flex;
    }

    .hero {
        min-height: auto;
        padding: 140px 20px 80px;
    }

    .hero-stats {
        gap: 24px;
        flex-wrap: wrap;
    }

    .benefits-grid {
        grid-template-columns: 1fr;
    }

    .pricing-grid {
        grid-template-columns: 1fr;
        max-width: 420px;
    }

    .steps {
        grid-template-columns: 1fr;
    }

    .logo-strip {
        gap: 24px;
    }
}

@media (max-width: 480px) {
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    .hero-buttons .btn {
        width: 100%;
        max-width: 280px;
    }
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
}