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

:root {
    /* Colors */
    --color-bg: #ffffff;
    --color-bg-alt: #f8f9fa;
    --color-text: #1a1a2e;
    --color-text-muted: #6b7280;
    --color-primary: #6366f1;
    --color-primary-hover: #4f46e5;
    --color-primary-light: #e0e7ff;
    --color-border: #e5e7eb;
    --color-shadow: rgba(0, 0, 0, 0.05);
    --color-example-bg: #fafafa;
    --color-tag-bg: #e0e7ff;
    --color-tag-text: #4f46e5;

    /* New */
    --color-surface: rgba(255, 255, 255, 0.85);
    --color-surface-strong: rgba(255, 255, 255, 0.95);
    --focus-ring: 0 0 0 3px var(--color-primary-light);

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 3rem;

    /* Spacing */
    --spacing-1: 0.25rem;
    --spacing-2: 0.5rem;
    --spacing-3: 0.75rem;
    --spacing-4: 1rem;
    --spacing-6: 1.5rem;
    --spacing-8: 2rem;
    --spacing-12: 3rem;
    --spacing-16: 4rem;
    --spacing-20: 5rem;
    --spacing-24: 6rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 var(--color-shadow);
    --shadow-md: 0 4px 6px -1px var(--color-shadow), 0 2px 4px -2px var(--color-shadow);
    --shadow-lg: 0 10px 15px -3px var(--color-shadow), 0 4px 6px -4px var(--color-shadow);
    --shadow-xl: 0 20px 25px -5px var(--color-shadow), 0 8px 10px -6px var(--color-shadow);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Accessibility helpers */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.skip-link {
    position: absolute;
    left: -9999px;
    top: var(--spacing-4);
    z-index: 1000;
    background: var(--color-bg);
    color: var(--color-text);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-3) var(--spacing-4);
    box-shadow: var(--shadow-lg);
}

.skip-link:focus {
    left: var(--spacing-4);
    outline: none;
    box-shadow: var(--shadow-lg), var(--focus-ring);
}

a {
    color: inherit;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
summary:focus-visible {
    outline: none;
    box-shadow: var(--focus-ring);
}

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-6);
}

/* Navigation */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar {
    background-color: var(--color-surface);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    transition: box-shadow 0.2s ease, background-color 0.2s ease;
}

.navbar.navbar--scrolled {
    background-color: var(--color-surface-strong);
    box-shadow: var(--shadow-md);
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
    gap: var(--spacing-6);
}

.nav-brand {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-3);
    text-decoration: none;
}

.logo-svg {
    flex-shrink: 0;
    border-radius: var(--radius-lg);
    transition: transform 0.2s ease;
}

.logo-svg:hover {
    transform: scale(1.05);
}

.logo-svg-sm {
    border-radius: var(--radius-md);
}

.brand-name {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
}

.nav-link {
    text-decoration: none;
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    padding: var(--spacing-2) var(--spacing-2);
    border-radius: var(--radius-md);
    transition: background-color 0.2s ease, color 0.2s ease;
}

.nav-link:hover {
    color: var(--color-text);
    background-color: rgba(99, 102, 241, 0.08);
}

.nav-link-cta {
    color: var(--color-primary);
    font-weight: 600;
}

/* Hero Section */
.hero {
    position: relative;
    padding: calc(72px + var(--spacing-24)) 0 var(--spacing-24);
    background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-alt) 100%);
    text-align: center;
    overflow: hidden;
}

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

.blob {
    position: absolute;
    width: 520px;
    height: 520px;
    border-radius: 999px;
    filter: blur(60px);
    opacity: 0.35;
    transform: translate3d(0, 0, 0);
}

.blob-1 {
    left: -160px;
    top: -220px;
    background: radial-gradient(circle at 30% 30%, rgba(99, 102, 241, 0.75), rgba(99, 102, 241, 0.05));
    animation: floatBlob 14s ease-in-out infinite;
}

.blob-2 {
    right: -180px;
    bottom: -260px;
    background: radial-gradient(circle at 70% 70%, rgba(79, 70, 229, 0.7), rgba(79, 70, 229, 0.05));
    animation: floatBlob 18s ease-in-out infinite reverse;
}

.hero-content {
    position: relative;
    max-width: 880px;
    margin: 0 auto;
}

.badge {
    display: inline-block;
    padding: var(--spacing-2) var(--spacing-4);
    background-color: var(--color-primary-light);
    color: var(--color-primary);
    font-size: var(--font-size-sm);
    font-weight: 600;
    border-radius: var(--radius-full);
    margin-bottom: var(--spacing-6);
}

.hero h1 {
    font-size: var(--font-size-4xl);
    font-weight: 750;
    letter-spacing: -0.02em;
    line-height: 1.08;
    margin-bottom: var(--spacing-6);
    color: var(--color-text);
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    color: var(--color-text-muted);
    line-height: 1.7;
    margin-bottom: var(--spacing-8);
    max-width: 680px;
    margin-left: auto;
    margin-right: auto;
}

.hero-cta {
    display: flex;
    justify-content: center;
    gap: var(--spacing-4);
    flex-wrap: wrap;
}

.hero-microcopy {
    margin-top: var(--spacing-6);
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    padding: var(--spacing-4) var(--spacing-8);
    font-size: var(--font-size-base);
    font-weight: 600;
    text-decoration: none;
    border: 1px solid transparent;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all 0.2s ease;
}

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

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

.btn-primary:active {
    transform: translateY(0);
}

.btn-secondary {
    background-color: rgba(99, 102, 241, 0.08);
    color: var(--color-primary);
    border-color: rgba(99, 102, 241, 0.20);
}

.btn-secondary:hover {
    background-color: rgba(99, 102, 241, 0.12);
    transform: translateY(-1px);
}

/* Section shared */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-16);
}

.section-header h2 {
    font-size: var(--font-size-3xl);
    font-weight: 750;
    margin-bottom: var(--spacing-4);
    color: var(--color-text);
}

.section-header p {
    font-size: var(--font-size-lg);
    color: var(--color-text-muted);
}

/* Features Section */
.features {
    padding: var(--spacing-24) 0;
    background-color: var(--color-bg);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-6);
}

.feature-card {
    padding: var(--spacing-8);
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--color-primary-light);
}

.feature-icon {
    width: 48px;
    height: 48px;
    margin-bottom: var(--spacing-4);
    color: var(--color-primary);
}

.feature-icon svg {
    width: 100%;
    height: 100%;
}

.feature-card h3 {
    font-size: var(--font-size-xl);
    font-weight: 650;
    margin-bottom: var(--spacing-3);
    color: var(--color-text);
}

.feature-card p {
    font-size: var(--font-size-base);
    color: var(--color-text-muted);
    line-height: 1.6;
}

/* Examples Section */
.examples {
    padding: var(--spacing-24) 0;
    background-color: var(--color-example-bg);
}

.examples-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--spacing-6);
}

.example-card {
    padding: var(--spacing-8);
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

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

.example-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
    margin-bottom: var(--spacing-4);
}

.example-number {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: var(--color-primary);
    color: white;
    font-size: var(--font-size-sm);
    font-weight: 700;
    border-radius: var(--radius-md);
}

.example-card h3 {
    font-size: var(--font-size-xl);
    font-weight: 650;
    color: var(--color-text);
}

.example-description {
    font-size: var(--font-size-base);
    color: var(--color-text-muted);
    line-height: 1.7;
    margin-bottom: var(--spacing-6);
}

.example-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-2);
}

.tag {
    display: inline-block;
    padding: var(--spacing-1) var(--spacing-3);
    background-color: var(--color-tag-bg);
    color: var(--color-tag-text);
    font-size: var(--font-size-xs);
    font-weight: 600;
    border-radius: var(--radius-full);
}

/* How it works */
.how {
    padding: var(--spacing-24) 0;
    background-color: var(--color-bg);
}

.how-grid {
    list-style: none;
    counter-reset: how;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-6);
    padding: 0;
}

.how-card {
    padding: var(--spacing-8);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    background-color: var(--color-bg);
}

.how-card h3 {
    font-size: var(--font-size-xl);
    font-weight: 650;
    margin-bottom: var(--spacing-3);
}

.how-card p {
    color: var(--color-text-muted);
    line-height: 1.7;
}

/* FAQ */
.faq {
    padding: var(--spacing-24) 0;
    background-color: var(--color-example-bg);
}

.faq-list {
    max-width: 860px;
    margin: 0 auto;
    display: grid;
    gap: var(--spacing-4);
}

.faq-item {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    background: var(--color-bg);
    padding: var(--spacing-4) var(--spacing-6);
}

.faq-item summary {
    cursor: pointer;
    font-weight: 650;
    padding: var(--spacing-2) 0;
}

.faq-item p {
    color: var(--color-text-muted);
    padding: var(--spacing-2) 0 var(--spacing-2);
}

/* Waitlist Section */
.waitlist {
    padding: var(--spacing-24) 0;
    background: linear-gradient(180deg, var(--color-bg-alt) 0%, var(--color-bg) 100%);
    text-align: center;
}

.waitlist-content {
    max-width: 600px;
    margin: 0 auto;
}

.waitlist h2 {
    font-size: var(--font-size-3xl);
    font-weight: 750;
    margin-bottom: var(--spacing-4);
    color: var(--color-text);
}

.waitlist > .container > .waitlist-content > p {
    font-size: var(--font-size-lg);
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-8);
}

.waitlist-form {
    margin-top: var(--spacing-8);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-4);
}

@media (min-width: 640px) {
    .form-group {
        flex-direction: row;
    }
}

.form-input {
    flex: 1;
    padding: var(--spacing-4) var(--spacing-6);
    font-size: var(--font-size-base);
    font-family: inherit;
    color: var(--color-text);
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    outline: none;
    transition: all 0.2s ease;
}

.form-input:focus {
    border-color: var(--color-primary);
    box-shadow: var(--focus-ring);
}

.form-input::placeholder {
    color: var(--color-text-muted);
}

/* Honeypot field - hidden from users */
.honeypot {
    position: absolute;
    left: -9999px;
    opacity: 0;
}

.form-note {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-top: var(--spacing-4);
}

.form-message {
    margin-top: var(--spacing-4);
    padding: var(--spacing-4);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-sm);
    display: none;
}

.form-message.success {
    display: block;
    background-color: #d1fae5;
    color: #065f46;
}

.form-message.error {
    display: block;
    background-color: #fee2e2;
    color: #991b1b;
}

/* Footer */
.footer {
    padding: var(--spacing-12) 0;
    background-color: var(--color-bg-alt);
    border-top: 1px solid var(--color-border);
}

.footer-content {
    text-align: center;
}

.footer-brand {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    margin-bottom: var(--spacing-4);
}

.footer-text {
    font-size: var(--font-size-base);
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-2);
}

.footer-copyright {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

/* Scroll reveal (progressive enhancement) */
[data-reveal] {
    opacity: 0;
    transform: translateY(14px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-reveal].reveal-in {
    opacity: 1;
    transform: translateY(0);
}

/* Animations */
@keyframes floatBlob {
    0% { transform: translate3d(0, 0, 0) scale(1); }
    50% { transform: translate3d(40px, -20px, 0) scale(1.06); }
    100% { transform: translate3d(0, 0, 0) scale(1); }
}

/* Responsive Design */
@media (max-width: 900px) {
    .nav-links {
        display: none;
    }
}

@media (max-width: 768px) {
    :root {
        --font-size-4xl: 2.25rem;
        --font-size-3xl: 1.75rem;
    }

    .hero {
        padding: calc(72px + var(--spacing-16)) 0 var(--spacing-16);
    }

    .hero-subtitle {
        font-size: var(--font-size-lg);
    }

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

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

    .feature-card,
    .example-card,
    .how-card {
        padding: var(--spacing-6);
    }

    .waitlist {
        padding: var(--spacing-16) 0;
    }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    .blob {
        animation: none;
    }

    [data-reveal] {
        opacity: 1;
        transform: none;
        transition: none;
    }

    .btn,
    .feature-card,
    .example-card {
        transition: none;
    }
}