/* Stratum - Premium Institutional Design System */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600&family=Geist+Mono:wght@400;500;600&display=swap');

:root {
    /* Color Palette - "Deep Capital" */
    --bg-page: #050505;
    --bg-card: #0A0A0A;
    --bg-glass: rgba(10, 10, 10, 0.8);

    --border-subtle: #1F1F1F;
    --border-strong: #333333;

    --text-primary: #EDEDED;
    --text-secondary: #A1A1AA;
    --text-tertiary: #52525B;

    --accent-primary: #2563EB;
    /* Royal Blue */
    --accent-glow: rgba(37, 99, 235, 0.15);

    --success: #10B981;
    --warning: #F59E0B;

    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 2rem;
    --space-lg: 4rem;
    --space-xl: 8rem;

    /* Transitions */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    background-color: var(--bg-page);
    color: var(--text-primary);
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    font-size: 16px;
    overflow-x: hidden;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 500;
    letter-spacing: -0.03em;
    color: var(--text-primary);
}

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

ul {
    list-style: none;
}

/* Utilities */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.mono {
    font-family: 'Geist Mono', monospace;
    letter-spacing: -0.02em;
}

.text-secondary {
    color: var(--text-secondary);
}

.text-tertiary {
    color: var(--text-tertiary);
}

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

.grid {
    display: grid;
    gap: var(--space-md);
}

.grid-2 {
    grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

@media (max-width: 768px) {

    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 2.5rem !important;
    }
}

/* Specific Components */

/* Navigation */
nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: var(--bg-glass);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-subtle);
    padding: 1.25rem 0;
}

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

.nav-logo {
    font-family: 'Geist Mono', monospace;
    font-weight: 600;
    font-size: 1.1rem;
    letter-spacing: 0.05em;
    color: var(--text-primary);
}

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

.nav-link {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.nav-link:hover,
.nav-link.active {
    color: var(--text-primary);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.6rem 1.2rem;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-fast);
}

.btn-primary {
    background: var(--text-primary);
    color: var(--bg-page);
    border: 1px solid var(--text-primary);
}

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

.btn-secondary {
    background: transparent;
    border: 1px solid var(--border-subtle);
    color: var(--text-secondary);
}

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

.btn-accent {
    background: var(--accent-primary);
    color: white;
    border: 1px solid var(--accent-primary);
    box-shadow: 0 0 15px var(--accent-glow);
}

.btn-accent:hover {
    background: transparent;
    color: var(--accent-primary);
}

/* Hero Section */
.hero {
    padding: 10rem 0 6rem;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: 50%;
    transform: translateX(-50%);
    width: 60%;
    height: 100%;
    background: radial-gradient(circle, rgba(37, 99, 235, 0.08) 0%, rgba(5, 5, 5, 0) 70%);
    z-index: -1;
    pointer-events: none;
}

.hero h1 {
    font-size: 4.5rem;
    line-height: 1.1;
    font-weight: 500;
    margin-bottom: 1.5rem;
    background: linear-gradient(to bottom right, #fff, #888);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 540px;
    margin-bottom: 2.5rem;
    font-weight: 300;
}

/* Cards & Feed */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
    padding: 2rem;
    transition: var(--transition-fast);
}

.card:hover {
    border-color: var(--border-strong);
    transform: translateY(-2px);
}

.feed-container {
    border: 1px solid var(--border-subtle);
    background: var(--bg-card);
    border-radius: 8px;
    overflow: hidden;
}

.feed-header {
    background: var(--border-subtle);
    padding: 0.75rem 1.5rem;
    display: grid;
    grid-template-columns: 1fr 1.5fr 1fr;
    font-size: 0.75rem;
    text-transform: uppercase;
    color: var(--text-tertiary);
    border-bottom: 1px solid var(--border-subtle);
}

.feed-row {
    padding: 1rem 1.5rem;
    display: grid;
    grid-template-columns: 1fr 1.5fr 1fr;
    border-bottom: 1px solid var(--border-subtle);
    align-items: center;
    transition: background 0.1s;
}

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

.feed-row:hover {
    background: rgba(255, 255, 255, 0.02);
}

.feed-date {
    font-size: 0.85rem;
    color: var(--text-tertiary);
}

.feed-entity {
    font-weight: 500;
    color: var(--text-primary);
}

.feed-type {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    font-size: 0.7rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 4px;
    color: var(--text-secondary);
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

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

main {
    animation: fadeIn 0.6s ease-out forwards;
}

/* Card Hover Polish */
.card:hover {
    border-color: var(--border-strong);
    transform: translateY(-4px);
    box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
}

/* Footer */
footer {
    border-top: 1px solid var(--border-subtle);
    padding: 6rem 0 3rem;
    background: var(--bg-page);
    color: var(--text-tertiary);
}

.footer-brand {
    margin-bottom: 2rem;
}

.footer-links a {
    display: block;
    margin-bottom: 0.75rem;
    transition: color 0.2s;
}

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