/* Faultlines Design System */
:root {
    --bg-color: #0f172a;
    /* Slate 900 */
    --surface-color: #1e293b;
    /* Slate 800 */
    --surface-hover: #334155;
    /* Slate 700 */
    --text-primary: #f8fafc;
    /* Slate 50 */
    --text-secondary: #94a3b8;
    /* Slate 400 */
    --accent-color: #ef4444;
    /* Red 500 */
    --accent-hover: #dc2626;
    /* Red 600 */
    --accent-glow: rgba(239, 68, 68, 0.15);
    --border-color: #334155;
    /* Slate 700 */
    --input-bg: #020617;
    /* Slate 950 */

    --font-serif: 'Playfair Display', Georgia, serif;
    --font-sans: 'Inter', system-ui, sans-serif;

    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --transition-base: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-sans);
    margin: 0;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1,
h2,
h3,
h4 {
    font-family: var(--font-serif);
    font-weight: 700;
    margin-top: 0;
    line-height: 1.2;
}

a {
    color: var(--text-primary);
    text-decoration: none;
    transition: var(--transition-base);
}

a:hover {
    color: var(--accent-color);
}

.container {
    max-width: 860px;
    margin: 0 auto;
    padding: 4rem 2rem;
}

/* Header */
header {
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 3rem;
    margin-bottom: 4rem;
    text-align: center;
    position: relative;
}

header::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background-color: var(--accent-color);
}

.brand-name {
    font-size: 4rem;
    letter-spacing: -0.05em;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    background: linear-gradient(to bottom right, #ffffff, #cbd5e1);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.tagline {
    color: var(--text-secondary);
    font-size: 0.875rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    font-weight: 600;
    opacity: 0.9;
}

/* Subscription Box */
.subscribe-section {
    background: linear-gradient(180deg, var(--surface-color) 0%, rgba(30, 41, 59, 0.5) 100%);
    padding: 3rem;
    border: 1px solid var(--border-color);
    text-align: center;
    margin-bottom: 5rem;
    border-radius: 4px;
    box-shadow: var(--shadow-sm);
}

.subscribe-section h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.subscribe-form {
    display: flex;
    gap: 0.75rem;
    justify-content: center;
    margin-top: 2rem;
    flex-wrap: wrap;
}

input[type="email"] {
    background: var(--input-bg);
    border: 1px solid var(--border-color);
    padding: 0.875rem 1.25rem;
    color: var(--text-primary);
    width: 320px;
    font-family: var(--font-sans);
    font-size: 1rem;
    border-radius: 2px;
    transition: var(--transition-base);
}

input[type="email"]:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

button {
    background: var(--accent-color);
    color: white;
    border: none;
    padding: 0.875rem 2rem;
    font-family: var(--font-sans);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    transition: var(--transition-base);
    border-radius: 2px;
}

button:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(220, 38, 38, 0.3);
}

button:active {
    transform: translateY(0);
}

/* Articles */
.article-preview {
    margin-bottom: 3rem;
    padding: 2rem;
    border: 1px solid transparent;
    border-radius: 4px;
    transition: var(--transition-base);
    cursor: pointer;
}

.article-preview:hover {
    background: var(--surface-color);
    border-color: var(--border-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Make the whole card clickable implies needing a link wrap or JS, but here we style the hover effect on the container */
.article-preview:hover .article-title a {
    color: var(--accent-color);
}

.article-date {
    color: var(--accent-color);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 0.75rem;
    display: block;
}

.article-title {
    font-size: 2.25rem;
    margin-bottom: 1rem;
    line-height: 1.1;
}

.article-excerpt {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-size: 1.125rem;
    line-height: 1.7;
    max-width: 65ch;
}

.read-more {
    display: inline-flex;
    align-items: center;
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.9rem;
    border-bottom: 1px solid var(--accent-color);
    padding-bottom: 2px;
    transition: var(--transition-base);
}

.read-more:hover {
    color: var(--accent-color);
    padding-left: 5px;
}

/* Responsive */
@media (max-width: 640px) {
    .container {
        padding: 2rem 1.5rem;
    }

    .brand-name {
        font-size: 2.5rem;
    }

    .subscribe-form {
        flex-direction: column;
    }

    input[type="email"] {
        width: 100%;
        box-sizing: border-box;
    }

    button {
        width: 100%;
    }
}