:root {
    --bg-color: #050505;
    --surface-color: #121212;
    --surface-hover: #1e1e1e;
    --text-primary: #f5f5f5;
    --text-secondary: #a3a3a3;
    --accent-color: #ffffff;
    --accent-gradient: linear-gradient(135deg, #ffffff 0%, #a3a3a3 100%);
    --border-color: rgba(255, 255, 255, 0.1);
    --glass-bg: rgba(5, 5, 5, 0.7);
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 8rem;

    --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-normal: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
    font-family: var(--font-sans);
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.5;
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    overflow-x: hidden;
    position: relative;
}

/* Background Effects */
.bg-glow {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100vw;
    height: 500px;
    background: radial-gradient(circle at 50% 0%, rgba(255, 255, 255, 0.05) 0%, transparent 70%);
    z-index: -1;
    pointer-events: none;
}

a {
    color: inherit;
    text-decoration: none;
}

/* Typography */
h1 {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 700;
    letter-spacing: -0.04em;
    line-height: 1.1;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

h2 {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 600;
    letter-spacing: -0.03em;
    line-height: 1.2;
}

h3 {
    font-size: 1.5rem;
    font-weight: 500;
    letter-spacing: -0.02em;
}

h4 {
    font-size: 1.125rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

p {
    color: var(--text-secondary);
    font-size: 1.125rem;
    line-height: 1.6;
}

.text-balance {
    text-wrap: balance;
}

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

.lead {
    font-size: 1.5rem;
    color: var(--text-primary);
    font-weight: 400;
    margin-top: 1rem;
}

/* Layout */
.container {
    width: 100%;
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.content-section {
    padding: var(--spacing-lg) 0;
}

.section-header {
    margin-bottom: var(--spacing-lg);
}

.narrow-content {
    max-width: 700px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    align-items: center;
}

/* Grid Layouts - Fixed Alignment */
.content-grid {
    display: grid;
    gap: var(--spacing-md);
}

.two-col {
    grid-template-columns: 1fr 1fr;
    align-items: center;
    justify-items: center;
}

.split-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-xl) 0;
    margin: var(--spacing-lg) auto;
}

.split-col {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: left;
}

.split-col h3 {
    width: 100%;
    text-align: center;
    margin-bottom: 2rem;
    color: var(--text-primary);
    font-size: 1.75rem;
}

.split-col.muted h3 {
    color: var(--text-secondary);
}

/* Navigation */
nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 80px;
    display: flex;
    align-items: center;
    border-bottom: 1px solid transparent;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    background: var(--glass-bg);
    z-index: 100;
    transition: border-bottom var(--transition-normal);
}

nav.scrolled {
    border-bottom: 1px solid var(--border-color);
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo {
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: -0.02em;
}

/* Buttons */
.btn-group {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 1.5rem;
    border-radius: 9999px;
    font-size: 1rem;
    font-weight: 500;
    transition: all var(--transition-fast);
    cursor: pointer;
    border: 1px solid transparent;
}

.btn-icon {
    width: 18px;
    height: 18px;
    margin-right: 0.5rem;
}

.btn-primary {
    background-color: var(--text-primary);
    color: var(--bg-color);
}

.btn-primary:hover {
    background-color: #e5e5e5;
    transform: scale(1.02);
}

.btn-secondary {
    background-color: transparent;
    color: var(--text-primary);
    border-color: var(--border-color);
}

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.05);
}

/* Hero Section */
.hero {
    min-height: 90vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    text-align: center;
    padding-top: 80px;
    /* offset for nav */
}

.hero h1 {
    margin-bottom: var(--spacing-md);
}

.hero-sub {
    color: var(--text-primary);
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
}

.hero-support {
    color: var(--text-secondary);
    font-size: 1.125rem;
    margin-bottom: var(--spacing-lg);
}

/* Components */
.list-card {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2.5rem;
    width: 100%;
    max-width: 480px;
}

.statement-card {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    width: 100%;
}

.statement-card blockquote {
    font-size: clamp(1.5rem, 4vw, 2.25rem);
    font-weight: 500;
    line-height: 1.3;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    border-left: 2px solid var(--border-color);
    padding-left: 1.5rem;
}

.clean-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    width: fit-content;
    margin: 0 auto;
}

.clean-list li {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.clean-list li::before {
    content: '';
    display: inline-block;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    margin-top: 0.6rem;
    background: var(--text-secondary);
    flex-shrink: 0;
}

.check-list li::before {
    background: transparent;
    content: '→';
    font-weight: 500;
    color: var(--text-primary);
    width: auto;
    height: auto;
    margin-top: 0;
}

.cross-list li::before {
    background: transparent;
    content: '—';
    color: var(--text-secondary);
    width: auto;
    height: auto;
    margin-top: 0;
}

.center-list li {
    justify-content: center;
    text-align: center;
}

.center-list li::before {
    display: none;
}

.calm-note {
    margin-top: 2rem;
    font-size: 1rem;
    color: var(--text-secondary);
    font-style: italic;
    text-align: center;
    width: 100%;
}

.emphasis-text {
    font-size: 1.35rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-top: 1rem;
}

/* Principles */
.principles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2.5rem;
    margin-top: var(--spacing-md);
}

.principle-item {
    border-top: 1px solid var(--border-color);
    padding-top: 1.5rem;
    transition: transform var(--transition-fast);
}

.principle-item:hover {
    transform: translateY(-4px);
}

/* Vision / Coming Next */
.vision-header {
    margin-bottom: var(--spacing-lg);
}

.vision-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2.5rem;
    width: 100%;
}

.vision-item {
    padding-left: 1.5rem;
    border-left: 1px solid var(--border-color);
    position: relative;
    transition: transform var(--transition-normal);
}

.vision-item:hover {
    transform: translateX(4px);
}

.vision-item::before {
    content: '';
    position: absolute;
    left: -4px;
    top: 8px;
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--text-secondary);
    transition: background var(--transition-fast), box-shadow var(--transition-fast);
}

.vision-item:hover::before {
    background: var(--text-primary);
    box-shadow: 0 0 10px rgba(255, 255, 255, 0.5);
}

/* Available Now */
.available-now {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 4rem 2rem;
    text-align: center;
    margin: var(--spacing-xl) auto;
    position: relative;
    overflow: hidden;
}

.available-now::before {
    content: '';
    position: absolute;
    top: -50px;
    left: 50%;
    transform: translateX(-50%);
    width: 15rem;
    height: 15rem;
    background: var(--accent-gradient);
    filter: blur(60px);
    opacity: 0.1;
    z-index: 0;
}

.available-now>* {
    position: relative;
    z-index: 1;
}

.available-now h2 {
    margin-bottom: 1rem;
}

.available-features {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 2rem;
    margin: 2.5rem 0;
}

.available-features span {
    color: var(--text-primary);
    font-weight: 500;
    font-size: 1.125rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.available-features span::before {
    content: '';
    display: block;
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: var(--text-secondary);
}

/* Footer */
footer {
    padding: var(--spacing-md) 0;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

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

.footer-links a {
    transition: color var(--transition-fast);
}

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

/* --- Scroll Animations --- */

/* Initial states */
.reveal-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-left {
    opacity: 0;
    transform: translateX(-30px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-right {
    opacity: 0;
    transform: translateX(30px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-fade {
    opacity: 0;
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Active states */
.reveal-up.active,
.reveal-left.active,
.reveal-right.active {
    opacity: 1;
    transform: translate(0, 0);
}

.reveal-fade.active {
    opacity: 1;
}

/* Hero animations on load */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fade-in-up {
    opacity: 0;
    animation: fadeInUp 0.8s var(--transition-normal) forwards;
}

.delay-1 {
    animation-delay: 0.1s;
}

.delay-2 {
    animation-delay: 0.2s;
}

/* Staggered transition delays for scroll sequences */
.stagger-1 {
    transition-delay: 100ms;
}

.stagger-2 {
    transition-delay: 200ms;
}

.stagger-3 {
    transition-delay: 300ms;
}

.stagger-4 {
    transition-delay: 400ms;
}

.stagger-5 {
    transition-delay: 500ms;
}

/* Responsive */
@media (max-width: 768px) {

    .two-col,
    .split-section {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .statement-card blockquote {
        text-align: center;
        border-left: none;
        border-top: 2px solid var(--border-color);
        padding-left: 0;
        padding-top: 1.5rem;
    }

    .available-features {
        flex-direction: column;
        gap: 1rem;
        align-items: center;
    }

    .footer-content {
        flex-direction: column;
        justify-content: center;
        text-align: center;
    }
}