/* North Wales Miners Association Trust - Modern Styles */
:root {
    --primary: #1a365d;
    --secondary: #2c5282;
    --accent: #ecc94b;
    --text: #2d3748;
    --light: #f7fafc;
    --border: #e2e8f0;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    line-height: 1.6;
    color: var(--text);
    background: var(--light);
}

/* Header */
header {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    padding: 2rem 1rem;
    text-align: center;
}

header h1 {
    font-size: clamp(1.5rem, 4vw, 2.5rem);
    margin-bottom: 0.5rem;
}

header .tagline {
    font-size: 1rem;
    opacity: 0.9;
}

/* Navigation */
nav {
    background: var(--secondary);
    padding: 0.5rem 1rem;
    position: sticky;
    top: 0;
    z-index: 100;
}

nav ul {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem;
    max-width: 1200px;
    margin: 0 auto;
}

nav a {
    color: white;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: background 0.3s;
}

nav a:hover, nav a.active {
    background: rgba(255,255,255,0.2);
}

/* Main content */
main {
    max-width: 1000px;
    margin: 2rem auto;
    padding: 0 1rem;
}

/* Section styles */
section {
    background: white;
    border-radius: 8px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

section h2 {
    color: var(--primary);
    border-bottom: 3px solid var(--accent);
    padding-bottom: 0.5rem;
    margin-bottom: 1rem;
}

section h3 {
    color: var(--secondary);
    margin: 1.5rem 0 0.5rem;
}

/* Cards grid */
.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-top: 1rem;
}

.card {
    background: var(--light);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.5rem;
    transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.card h3 {
    color: var(--primary);
    margin: 0 0 0.5rem;
}

/* Colliery list */
.colliery-list {
    display: grid;
    gap: 0.75rem;
    margin: 1rem 0;
}

.colliery-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1rem;
    background: var(--light);
    border-radius: 4px;
    border-left: 4px solid var(--secondary);
}

.colliery-item.preserved {
    border-left-color: #38a169;
    background: #f0fff4;
}

.colliery-item .dates {
    color: #718096;
    font-size: 0.9rem;
}

.colliery-item .status {
    font-weight: 600;
    font-size: 0.85rem;
}

.colliery-item .status.gone {
    color: #e53e3e;
}

.colliery-item .status.preserved {
    color: #38a169;
}

/* Mine details */
.mine-info {
    display: grid;
    gap: 1rem;
}

.mine-info dt {
    font-weight: 600;
    color: var(--primary);
}

.mine-info dd {
    margin-left: 0;
    margin-bottom: 1rem;
}

/* Links */
a {
    color: var(--secondary);
}

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

/* Footer */
footer {
    background: var(--primary);
    color: white;
    text-align: center;
    padding: 2rem 1rem;
    margin-top: 2rem;
}

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

/* Utilities */
.highlight {
    background: linear-gradient(120deg, rgba(236,201,75,0.2), rgba(236,201,75,0.4));
    padding: 0.1rem 0.3rem;
    border-radius: 2px;
}

.btn {
    display: inline-block;
    background: var(--secondary);
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: 4px;
    text-decoration: none;
    transition: background 0.3s;
}

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

/* Grid reference styling */
.grid-ref {
    font-family: 'Courier New', monospace;
    background: #edf2f7;
    padding: 0.2rem 0.5rem;
    border-radius: 3px;
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 600px) {
    header {
        padding: 1.5rem 1rem;
    }

    section {
        padding: 1.5rem;
    }

    nav ul {
        flex-direction: column;
        align-items: center;
    }
}