/* ============================================
   NeuroSync — Landing Page Styles
   Clinical-grade design system
   ============================================ */

/* --- CSS Custom Properties --- */
:root {
    /* Brand Colors */
    --blue-50: #eef5ff;
    --blue-100: #d9e8ff;
    --blue-200: #bcd7ff;
    --blue-300: #8ebfff;
    --blue-400: #599dff;
    --blue-500: #3378ff;
    --blue-600: #0062cc;
    --blue-700: #0050b3;
    --blue-800: #004299;
    --blue-900: #003170;

    /* Neutrals */
    --gray-50: #f8f9fb;
    --gray-100: #f0f2f5;
    --gray-200: #e4e7ec;
    --gray-300: #ced3db;
    --gray-400: #98a2b3;
    --gray-500: #667085;
    --gray-600: #475467;
    --gray-700: #344054;
    --gray-800: #1d2939;
    --gray-900: #101828;

    /* Semantic */
    --success: #12b76a;
    --warning: #f79009;

    /* Layout */
    --container-max: 1200px;
    --nav-height: 72px;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(16, 24, 40, 0.05);
    --shadow-md: 0 4px 8px -2px rgba(16, 24, 40, 0.08), 0 2px 4px -2px rgba(16, 24, 40, 0.06);
    --shadow-lg: 0 12px 24px -4px rgba(16, 24, 40, 0.08), 0 4px 8px -4px rgba(16, 24, 40, 0.03);
    --shadow-xl: 0 20px 50px -12px rgba(16, 24, 40, 0.12);
    --shadow-blue: 0 8px 32px -4px rgba(0, 98, 204, 0.25);

    /* Transitions */
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --transition-fast: 150ms var(--ease-out);
    --transition-base: 250ms var(--ease-out);
    --transition-slow: 400ms var(--ease-out);
}

/* --- 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', system-ui, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--gray-700);
    background: var(--gray-50);
    overflow-x: hidden;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: color var(--transition-fast);
}

ul, ol {
    list-style: none;
}

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

/* --- Navigation --- */
#main-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(248, 249, 251, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    transition: background var(--transition-base), box-shadow var(--transition-base);
}

#main-nav.scrolled {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: var(--shadow-sm);
}

.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
    height: var(--nav-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--blue-600);
    letter-spacing: -0.01em;
}

.logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--blue-600);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-link {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--gray-600);
    position: relative;
    padding: 4px 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--blue-600);
    border-radius: 1px;
    transition: width var(--transition-base);
}

.nav-link:hover {
    color: var(--blue-600);
}

.nav-link:hover::after {
    width: 100%;
}

.nav-cta {
    display: inline-flex;
    align-items: center;
    padding: 10px 22px;
    background: var(--blue-600);
    color: white;
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.nav-cta:hover {
    background: var(--blue-700);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
    color: white;
}

.nav-mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-mobile-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--gray-700);
    border-radius: 2px;
    transition: all var(--transition-fast);
}

.mobile-menu {
    display: none;
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: white;
    padding: 16px 24px 24px;
    flex-direction: column;
    gap: 8px;
    z-index: 999;
    box-shadow: var(--shadow-lg);
    border-bottom: 1px solid var(--gray-200);
}

.mobile-menu.open {
    display: flex;
}

.mobile-link {
    padding: 12px 16px;
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--gray-700);
    border-radius: var(--radius-sm);
    transition: background var(--transition-fast);
}

.mobile-link:hover {
    background: var(--blue-50);
    color: var(--blue-600);
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-family: inherit;
    font-weight: 600;
    font-size: 0.9rem;
    padding: 12px 28px;
    border-radius: var(--radius-full);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.btn-primary {
    background: var(--blue-600);
    color: white;
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    background: var(--blue-700);
    transform: translateY(-1px);
    box-shadow: var(--shadow-blue);
    color: white;
}

.btn-outline {
    background: transparent;
    color: var(--blue-600);
    border-color: var(--blue-200);
}

.btn-outline:hover {
    background: var(--blue-50);
    border-color: var(--blue-400);
    color: var(--blue-700);
}

.btn-outline-white {
    background: transparent;
    color: white;
    border-color: rgba(255, 255, 255, 0.3);
}

.btn-outline-white:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.6);
    color: white;
}

.btn-lg {
    padding: 14px 36px;
    font-size: 1rem;
}

.btn-plan {
    width: 100%;
    padding: 14px 24px;
    background: var(--gray-100);
    color: var(--gray-800);
    font-weight: 600;
    border-radius: var(--radius-md);
}

.btn-plan:hover {
    background: var(--gray-200);
    transform: translateY(-1px);
    color: var(--gray-900);
}

/* --- Hero Section --- */
#hero {
    position: relative;
    padding: 160px 0 100px;
    overflow: hidden;
    background: linear-gradient(180deg, var(--blue-50) 0%, var(--gray-50) 100%);
}

.hero-bg-effects {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.hero-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.4;
}

.hero-orb-1 {
    width: 500px;
    height: 500px;
    background: var(--blue-200);
    top: -100px;
    right: -100px;
    animation: float1 12s ease-in-out infinite;
}

.hero-orb-2 {
    width: 350px;
    height: 350px;
    background: var(--blue-300);
    bottom: -50px;
    left: -50px;
    animation: float2 10s ease-in-out infinite;
}

.hero-orb-3 {
    width: 200px;
    height: 200px;
    background: var(--blue-100);
    top: 30%;
    left: 40%;
    animation: float3 14s ease-in-out infinite;
}

@keyframes float1 {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(-30px, 20px) scale(1.05); }
}

@keyframes float2 {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(20px, -30px) scale(1.08); }
}

@keyframes float3 {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(15px, 15px) scale(0.95); }
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    padding: 8px 20px;
    background: white;
    color: var(--blue-600);
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-md);
    margin-bottom: 28px;
    animation: fadeInUp 0.6s var(--ease-out) both;
}

#hero h1 {
    font-size: clamp(2.5rem, 5.5vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.03em;
    color: var(--gray-900);
    margin-bottom: 20px;
    animation: fadeInUp 0.6s var(--ease-out) 0.1s both;
}

.hero-subtitle {
    max-width: 640px;
    margin: 0 auto 36px;
    font-size: 1.125rem;
    line-height: 1.7;
    color: var(--gray-500);
    animation: fadeInUp 0.6s var(--ease-out) 0.2s both;
}

.hero-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 64px;
    animation: fadeInUp 0.6s var(--ease-out) 0.3s both;
}

.hero-metrics {
    display: inline-flex;
    align-items: center;
    gap: 40px;
    background: white;
    padding: 24px 48px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    animation: fadeInUp 0.6s var(--ease-out) 0.4s both;
}

.hero-metric {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
}

.metric-value {
    font-size: 2rem;
    font-weight: 800;
    color: var(--blue-600);
    letter-spacing: -0.02em;
}

.metric-suffix {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--blue-600);
}

.metric-label {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--gray-400);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.hero-metric-divider {
    width: 1px;
    height: 48px;
    background: var(--gray-200);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(24px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* --- Section Common --- */
section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-badge {
    display: inline-block;
    padding: 6px 16px;
    background: var(--blue-50);
    color: var(--blue-600);
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    border-radius: var(--radius-full);
    margin-bottom: 16px;
}

.section-header h2 {
    font-size: clamp(1.8rem, 3.5vw, 2.5rem);
    font-weight: 800;
    color: var(--gray-900);
    letter-spacing: -0.02em;
    margin-bottom: 16px;
}

.section-desc {
    max-width: 560px;
    margin: 0 auto;
    color: var(--gray-500);
    font-size: 1.05rem;
    line-height: 1.7;
}

/* --- Features --- */
#features {
    background: white;
}

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

.feature-card {
    padding: 32px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
    background: var(--gray-50);
    transition: all var(--transition-base);
}

.feature-card:hover {
    border-color: var(--blue-200);
    background: var(--blue-50);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    background: var(--blue-600);
    color: white;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 10px;
}

.feature-card p {
    font-size: 0.9rem;
    line-height: 1.6;
    color: var(--gray-500);
}

/* --- How It Works --- */
#how-it-works {
    background: var(--gray-50);
}

.steps-grid {
    display: flex;
    align-items: stretch;
    gap: 0;
    justify-content: center;
}

.step-card {
    flex: 1;
    max-width: 340px;
    padding: 40px 32px;
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    position: relative;
    transition: all var(--transition-base);
}

.step-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.step-number {
    font-size: 3rem;
    font-weight: 800;
    color: var(--blue-100);
    letter-spacing: -0.04em;
    margin-bottom: 16px;
    line-height: 1;
}

.step-content h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 12px;
}

.step-content p {
    font-size: 0.9rem;
    line-height: 1.7;
    color: var(--gray-500);
}

.step-connector {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 8px;
    color: var(--blue-300);
}

/* --- Pricing --- */
#pricing {
    background: white;
}

.billing-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 48px;
}

.billing-label {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--gray-400);
    transition: color var(--transition-fast);
    cursor: pointer;
}

.billing-label.active {
    color: var(--gray-900);
    font-weight: 600;
}

.save-badge {
    display: inline-block;
    padding: 2px 10px;
    background: var(--success);
    color: white;
    font-size: 0.7rem;
    font-weight: 700;
    border-radius: var(--radius-full);
    letter-spacing: 0.02em;
    vertical-align: middle;
    margin-left: 4px;
}

.toggle-switch {
    position: relative;
    width: 52px;
    height: 28px;
    background: var(--gray-200);
    border: none;
    border-radius: 14px;
    cursor: pointer;
    transition: background var(--transition-fast);
    padding: 0;
}

.toggle-switch.active {
    background: var(--blue-600);
}

.toggle-thumb {
    position: absolute;
    top: 3px;
    left: 3px;
    width: 22px;
    height: 22px;
    background: white;
    border-radius: 50%;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-base);
}

.toggle-switch.active .toggle-thumb {
    transform: translateX(24px);
}

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

.pricing-card {
    position: relative;
    padding: 36px 32px;
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-xl);
    transition: all var(--transition-base);
}

.pricing-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.pricing-card.featured {
    background: white;
    border: 2px solid var(--blue-600);
    box-shadow: var(--shadow-blue);
    transform: scale(1.02);
    padding: 48px 32px 36px;
}

.pricing-card.featured:hover {
    transform: scale(1.02) translateY(-4px);
    box-shadow: 0 12px 48px -8px rgba(0, 98, 204, 0.3);
}

.popular-badge {
    position: absolute;
    top: -14px;
    left: 50%;
    transform: translateX(-50%);
    padding: 6px 20px;
    background: var(--blue-600);
    color: white;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    border-radius: var(--radius-full);
    white-space: nowrap;
}

.plan-name {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 6px;
}

.plan-desc {
    font-size: 0.85rem;
    color: var(--gray-500);
    line-height: 1.5;
    margin-bottom: 8px;
}

.pricing-amount {
    display: flex;
    align-items: baseline;
    gap: 2px;
    padding: 20px 0;
    border-top: 1px solid var(--gray-200);
    border-bottom: 1px solid var(--gray-200);
    margin: 16px 0 24px;
}

.currency {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--gray-900);
}

.price {
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--gray-900);
    letter-spacing: -0.03em;
    line-height: 1;
    transition: all var(--transition-base);
}

.period {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--gray-400);
    margin-left: 4px;
}

.plan-features {
    display: flex;
    flex-direction: column;
    gap: 14px;
    margin-bottom: 28px;
}

.plan-features li {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.875rem;
    color: var(--gray-600);
}

.check-icon {
    flex-shrink: 0;
    color: var(--success);
}

.featured .btn-plan {
    background: var(--blue-600);
    color: white;
}

.featured .btn-plan:hover {
    background: var(--blue-700);
    color: white;
    box-shadow: var(--shadow-blue);
}

/* --- Comparison Table --- */
#comparison {
    padding: 0 0 100px;
    background: white;
}

.comparison-heading {
    text-align: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 40px;
}

.table-wrapper {
    overflow-x: auto;
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

.comparison-table thead {
    background: var(--gray-50);
}

.comparison-table th {
    padding: 16px 20px;
    text-align: left;
    font-weight: 600;
    color: var(--gray-700);
    border-bottom: 2px solid var(--gray-200);
    white-space: nowrap;
}

.comparison-table td {
    padding: 14px 20px;
    border-bottom: 1px solid var(--gray-100);
    color: var(--gray-600);
}

.comparison-table tbody tr:last-child td {
    border-bottom: none;
}

.comparison-table tbody tr:hover {
    background: var(--blue-50);
}

.highlight-col {
    background: rgba(0, 98, 204, 0.03);
}

thead .highlight-col {
    color: var(--blue-600);
}

.check {
    color: var(--success);
    font-weight: 700;
}

.cross {
    color: var(--gray-300);
}

/* --- Contact / CTA --- */
#contact {
    padding: 100px 0;
    background: var(--gray-50);
}

.cta-card {
    background: linear-gradient(135deg, var(--blue-700) 0%, var(--blue-900) 100%);
    border-radius: var(--radius-xl);
    padding: 64px;
    display: flex;
    align-items: center;
    gap: 64px;
    box-shadow: var(--shadow-xl);
    position: relative;
    overflow: hidden;
}

.cta-card::before {
    content: '';
    position: absolute;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(255,255,255,0.08) 0%, transparent 70%);
    top: -150px;
    right: -100px;
    pointer-events: none;
}

.cta-content {
    flex: 1;
}

.cta-content h2 {
    font-size: 2rem;
    font-weight: 800;
    color: white;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.cta-content p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 1.05rem;
    line-height: 1.7;
    margin-bottom: 28px;
    max-width: 480px;
}

.cta-actions {
    display: flex;
    gap: 12px;
}

.cta-actions .btn-primary {
    background: white;
    color: var(--blue-700);
}

.cta-actions .btn-primary:hover {
    background: var(--blue-50);
    color: var(--blue-800);
    box-shadow: var(--shadow-lg);
}

.cta-info {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.cta-info-item {
    display: flex;
    align-items: center;
    gap: 12px;
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9rem;
}

.cta-info-item svg {
    flex-shrink: 0;
    opacity: 0.6;
}

/* --- Footer --- */
#footer {
    background: var(--gray-900);
    color: var(--gray-400);
    padding-top: 64px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    gap: 48px;
    padding-bottom: 48px;
}

.footer-brand .nav-logo {
    color: white;
    margin-bottom: 12px;
}

.footer-tagline {
    font-size: 0.875rem;
    color: var(--gray-500);
    max-width: 280px;
}

.footer-links-group {
    display: flex;
    gap: 64px;
}

.footer-col {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-col h4 {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--gray-300);
    margin-bottom: 4px;
}

.footer-col a {
    font-size: 0.875rem;
    color: var(--gray-500);
    transition: color var(--transition-fast);
}

.footer-col a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding: 24px 0;
}

.footer-bottom p {
    font-size: 0.8rem;
    color: var(--gray-500);
}

/* --- Responsive --- */
@media (max-width: 960px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .pricing-grid {
        grid-template-columns: 1fr;
        max-width: 440px;
        margin: 0 auto;
    }

    .pricing-card.featured {
        transform: none;
    }

    .pricing-card.featured:hover {
        transform: translateY(-4px);
    }

    .steps-grid {
        flex-direction: column;
        align-items: center;
    }

    .step-card {
        max-width: 100%;
    }

    .step-connector {
        transform: rotate(90deg);
        padding: 8px 0;
    }

    .cta-card {
        flex-direction: column;
        padding: 48px 32px;
        text-align: center;
        gap: 32px;
    }

    .cta-content p {
        margin-left: auto;
        margin-right: auto;
    }

    .cta-actions {
        justify-content: center;
    }

    .footer-content {
        flex-direction: column;
        gap: 32px;
    }
}

@media (max-width: 680px) {
    .nav-links {
        display: none;
    }

    .nav-cta {
        display: none;
    }

    .nav-mobile-toggle {
        display: flex;
    }

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

    .hero-metrics {
        flex-direction: column;
        gap: 20px;
        padding: 24px 32px;
    }

    .hero-metric-divider {
        width: 48px;
        height: 1px;
    }

    .hero-actions {
        flex-direction: column;
        gap: 12px;
    }

    .hero-actions .btn {
        width: 100%;
    }

    .cta-actions {
        flex-direction: column;
    }

    .cta-actions .btn {
        width: 100%;
    }

    .comparison-table th,
    .comparison-table td {
        padding: 10px 12px;
        font-size: 0.8rem;
    }

    .footer-links-group {
        gap: 40px;
    }
}

/* --- Scroll Reveal Animations --- */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
}

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

/* Staggered feature cards */
.feature-card.reveal:nth-child(1) { transition-delay: 0s; }
.feature-card.reveal:nth-child(2) { transition-delay: 0.08s; }
.feature-card.reveal:nth-child(3) { transition-delay: 0.16s; }
.feature-card.reveal:nth-child(4) { transition-delay: 0.24s; }
.feature-card.reveal:nth-child(5) { transition-delay: 0.32s; }
.feature-card.reveal:nth-child(6) { transition-delay: 0.4s; }

/* Staggered pricing cards */
.pricing-card.reveal:nth-child(1) { transition-delay: 0s; }
.pricing-card.reveal:nth-child(2) { transition-delay: 0.1s; }
.pricing-card.reveal:nth-child(3) { transition-delay: 0.2s; }