:root {
    /* Muted Bauhaus Colors */
    --primary-cool: #2C3E50;
    --primary-warm: #A0522D;
    --accent-mustard: #D4A017;
    --accent-teal: #5F9EA0;
    --accent-sage: #8FBC8F;
    --accent-terracotta: #CD853F;

    /* Dark Mode */
    --bg-dark: #2A2D34;
    --bg-dark-elevated: #363940;
    --text-dark-primary: #F5F0E6;
    --text-dark-secondary: rgba(245, 240, 230, 0.7);

    /* Light Mode */
    --bg-light: #FAF8F3;
    --bg-light-elevated: #FFFFFF;
    --text-light-primary: #2A2D34;
    --text-light-secondary: rgba(42, 45, 52, 0.7);

    /* Shared */
    --radius-card: 16px;
    --radius-button: 12px;
    --shadow-depth: 4px;
    --transition-fast: 80ms;
    --transition-normal: 200ms;
}

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

body {
    font-family: 'Roboto', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-dark-primary);
    line-height: 1.7;
    min-height: 100vh;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 24px 20px;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 40px;
    padding-bottom: 24px;
    border-bottom: 1px solid rgba(245, 240, 230, 0.1);
}

.logo {
    height: 80px;
    width: auto;
    margin-bottom: 24px;
    filter: drop-shadow(0 var(--shadow-depth) 4px rgba(0, 0, 0, 0.3));
}

/* Language Selector */
.language-selector {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
}

.lang-btn {
    font-family: 'Roboto', sans-serif;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 1px;
    padding: 10px 14px;
    border: none;
    border-radius: var(--radius-button);
    background-color: var(--bg-dark-elevated);
    color: var(--text-dark-secondary);
    cursor: pointer;
    position: relative;
    transition: all var(--transition-fast);
    box-shadow: 0 var(--shadow-depth) 0 rgba(0, 0, 0, 0.4);
    transform: translateY(0);
}

.lang-btn:hover {
    background-color: var(--primary-cool);
    color: var(--text-dark-primary);
}

.lang-btn:active {
    transform: translateY(var(--shadow-depth));
    box-shadow: 0 0 0 rgba(0, 0, 0, 0.4);
}

.lang-btn.active {
    background-color: var(--accent-mustard);
    color: var(--bg-dark);
    box-shadow: 0 var(--shadow-depth) 0 #9e7810;
}

/* Main Content */
main {
    background-color: var(--bg-dark-elevated);
    border-radius: var(--radius-card);
    padding: 32px 28px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
    animation: fadeIn 0.4s ease-out;
}

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

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

/* Typography */
main h1 {
    font-size: 28px;
    font-weight: 900;
    letter-spacing: 2px;
    color: var(--accent-mustard);
    margin-bottom: 8px;
    text-transform: uppercase;
}

main h2 {
    font-size: 20px;
    font-weight: 700;
    color: var(--accent-teal);
    margin: 32px 0 16px 0;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--accent-teal);
}

main h3 {
    font-size: 16px;
    font-weight: 700;
    color: var(--accent-sage);
    margin: 24px 0 12px 0;
}

main h4 {
    font-size: 14px;
    font-weight: 700;
    color: var(--accent-terracotta);
    margin: 20px 0 10px 0;
}

main p {
    margin-bottom: 16px;
    color: var(--text-dark-secondary);
}

main strong {
    color: var(--text-dark-primary);
    font-weight: 700;
}

main ul,
main ol {
    margin: 12px 0 20px 24px;
    color: var(--text-dark-secondary);
}

main li {
    margin-bottom: 8px;
}

main a {
    color: var(--accent-mustard);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color var(--transition-normal);
}

main a:hover {
    border-bottom-color: var(--accent-mustard);
}

main hr {
    border: none;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(245, 240, 230, 0.2), transparent);
    margin: 32px 0;
}

.update-date {
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--text-dark-secondary);
    margin-bottom: 24px;
}

/* Footer */
footer {
    text-align: center;
    margin-top: 40px;
    padding-top: 24px;
    border-top: 1px solid rgba(245, 240, 230, 0.1);
    color: var(--text-dark-secondary);
    font-size: 14px;
}

/* Responsive */
@media (max-width: 600px) {
    .container {
        padding: 16px 12px;
    }

    main {
        padding: 24px 20px;
    }

    .logo {
        font-size: 28px;
        letter-spacing: 3px;
    }

    main h1 {
        font-size: 22px;
    }

    main h2 {
        font-size: 18px;
    }

    .lang-btn {
        padding: 8px 10px;
        font-size: 11px;
    }
}