/* Modern Design System - Matching Index Page */
:root {
    --channel-primary: #3976f0;
    --channel-primary-hover: #4a6bd8;
    --color-gray-50: #0f0f0f;
    --color-gray-100: #1a1a1a;
    --color-gray-200: #2a2a2a;
    --color-gray-300: #3a3a3a;
    --color-gray-400: #888;
    --color-gray-500: #666;
    --color-gray-600: #888;
    --color-gray-700: #999;
    --color-gray-800: #aaa;
    --color-gray-900: #ffffff;
    --color-white: #ffffff;
}

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

body {
    font-family: 'Figtree', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.6;
    color: var(--color-gray-900);
    background: var(--color-gray-100);
    min-height: 100dvh;
    padding: 2rem 1rem;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem 0;
}

.header {
    text-align: center;
    margin-bottom: 3rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--color-gray-300);
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--channel-primary);
    text-decoration: none;
    font-weight: 500;
    margin-bottom: 2rem;
    font-size: 0.95rem;
    transition: color 0.2s ease;
}

.back-link:hover {
    color: var(--channel-primary-hover);
}

h1 {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.date-badge {
    display: inline-block;
    background: linear-gradient(135deg, var(--channel-primary) 0%, var(--channel-primary-hover) 100%);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 1rem;
    font-size: 0.875rem;
    font-weight: 600;
}

.section {
    background: var(--color-gray-200);
    border: 1px solid var(--color-gray-300);
    border-radius: 1rem;
    padding: 2rem;
    margin-bottom: 2rem;
    transition: all 0.2s ease;
}

.section:hover {
    border-color: var(--color-gray-400);
}

h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--channel-primary);
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-gray-900);
    margin: 1.5rem 0 1rem 0;
}

p, li {
    font-size: 1rem;
    color: var(--color-gray-800);
    margin-bottom: 1rem;
    line-height: 1.7;
}

ul {
    margin-left: 1.5rem;
}

li {
    margin-bottom: 0.5rem;
}

strong {
    color: var(--color-gray-900);
    font-weight: 600;
}

a {
    color: var(--channel-primary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--channel-primary-hover);
    text-decoration: underline;
}

.highlight {
    background: linear-gradient(135deg, rgba(57, 118, 240, 0.1) 0%, rgba(74, 107, 216, 0.05) 100%);
    border: 2px solid rgba(57, 118, 240, 0.2);
    border-radius: 1rem;
    padding: 1.5rem;
    margin: 1.5rem 0;
}

.highlight strong {
    color: var(--channel-primary);
}

@media (max-width: 768px) {
    body {
        padding: 1rem 0.5rem;
    }

    .container {
        padding: 1rem 0;
    }

    .section {
        padding: 1.5rem;
    }

    h1 {
        font-size: 2rem;
    }

    .header {
        margin-bottom: 2rem;
        padding-bottom: 1.5rem;
    }
}