:root {
    --bg-color: #0a0a0a;
    --text-primary: #e4e4e7;
    --text-secondary: #a1a1aa;
    --text-tertiary: #52525b;
    --accent: #ffffff;
    --card-bg: #111111;
    --card-border: #1f1f22;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-secondary);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100vh;
    display: flex;
    justify-content: center;
}

.container {
    width: 100%;
    max-width: 800px;
    padding: 4rem 2rem;
    display: flex;
    flex-direction: column;
    gap: 4rem;
}

/* Header / Hero */
.hero {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-top: 4rem;
    margin-bottom: 2rem;
    animation: fadeUp 1s cubic-bezier(0.16, 1, 0.3, 1) forwards;
    opacity: 0;
    transform: translateY(20px);
}

.badge {
    align-self: flex-start;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-tertiary);
    border: 1px solid var(--text-tertiary);
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-weight: 500;
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 500;
    line-height: 1.1;
    color: var(--text-primary);
    letter-spacing: -0.03em;
}

.subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    font-weight: 300;
}

/* Content Grid */
.content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

.principle-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 2.5rem;
    transition: all 0.3s ease;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.principle-card:hover {
    border-color: var(--text-tertiary);
    transform: translateY(-2px);
    box-shadow: 0 10px 40px -10px rgba(0,0,0,0.5);
}

/* Stagger animations */
.principle-card:nth-child(1) { animation-delay: 0.1s; }
.principle-card:nth-child(2) { animation-delay: 0.2s; }
.principle-card:nth-child(3) { animation-delay: 0.3s; }
.principle-card:nth-child(4) { animation-delay: 0.4s; }

.principle-number {
    font-family: monospace;
    color: var(--text-tertiary);
    font-size: 0.875rem;
    margin-bottom: 1rem;
    letter-spacing: 0.05em;
}

h2 {
    color: var(--text-primary);
    font-size: 1.5rem;
    font-weight: 500;
    margin-bottom: 1rem;
    letter-spacing: -0.01em;
}

.principle-card p {
    font-size: 1rem;
    font-weight: 300;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* Footer */
footer {
    margin-top: 4rem;
    padding-top: 2rem;
    border-top: 1px solid var(--card-border);
    text-align: center;
    font-size: 0.875rem;
    color: var(--text-tertiary);
    animation: fadeUp 1s cubic-bezier(0.16, 1, 0.3, 1) forwards;
    animation-delay: 0.6s;
    opacity: 0;
}

/* Animations */
@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}