:root {
    --bg-color: #0d1117;
    --card-bg: #161b22;
    --text-color: #f0f6fc;
    --muted-text: #8b949e;
    --hover-bg: #21262d;
    --thead-bg: #21262d;
    --thead-text: #f0f6fc;
    --border-color: #30363d;
    --time-bg: #21262d;
    --accent: #7cc4a4;
    --accent-ink: #0d1117;
    --code-bg: #0d1117;
    --code-border: #30363d;
    --code-header-bg: #1f242c;
    --syntax-keyword: #ff7b72;
    --syntax-string: #a5d6ff;
    --syntax-comment: #8b949e;
    --syntax-number: #79c0ff;
    --syntax-type: #ffa657;
}

.light-theme {
    --bg-color: #f8f9fa;
    --card-bg: #ffffff;
    --text-color: #212529;
    --muted-text: #57606a;
    --hover-bg: #e9ecef;
    --thead-bg: #343a40;
    --thead-text: #ffffff;
    --border-color: #dee2e6;
    --time-bg: #f1f3f4;
    --accent: #1e7e58;
    --accent-ink: #ffffff;
    --code-bg: #f6f8fa;
    --code-border: #d0d7de;
    --code-header-bg: #eef1f4;
    --syntax-keyword: #cf222e;
    --syntax-string: #0a3069;
    --syntax-comment: #6e7781;
    --syntax-number: #0550ae;
    --syntax-type: #953800;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    transition: background-color 0.3s, color 0.3s;
}

.container {
    max-width: 1200px;
    margin: auto;
    padding-top: 20px;
    padding-bottom: 40px;
}

/* Nav Header matching give.timestamp & give.dns */
.nav-header {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    margin-bottom: 20px;
    padding: 15px 20px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    transition: background-color 0.3s, border-color 0.3s;
}

.nav-links {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    flex-wrap: wrap;
    position: relative;
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-color);
    text-decoration: none;
    margin: 0;
    text-align: center;
    flex: 1;
}

.nav-brand:hover {
    color: #007bff;
    text-decoration: none;
}

#theme-toggle {
    font-size: 1.2rem;
    padding: 8px 12px;
    border-radius: 50px;
    min-width: auto;
    transition: all 0.3s ease;
    position: absolute;
    right: 0;
}

#theme-toggle:hover {
    transform: scale(1.1);
}

/* Card Styling */
.card {
    margin-bottom: 20px;
    border-radius: 8px;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    transition: background-color 0.3s, border-color 0.3s;
}

.card-title {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 0.5rem;
}

.card-text {
    color: var(--text-color);
    opacity: 0.85;
}

/* Generator Form & Output */
.field-group {
    margin-bottom: 1.25rem;
}

.field-label {
    display: block;
    font-size: 0.82rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--muted-text);
    margin-bottom: 0.45rem;
}

.form-control {
    background-color: var(--time-bg);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    border-radius: 6px;
    font-size: 1rem;
    padding: 10px 14px;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-control:focus {
    background-color: var(--time-bg);
    color: var(--text-color);
    border-color: #007bff;
    box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
}

.out-group {
    display: flex;
    gap: 10px;
    align-items: stretch;
}

.val-display {
    flex: 1;
    background: var(--time-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 10px 14px;
    font-family: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--accent);
    min-height: 46px;
    display: flex;
    align-items: center;
    overflow-x: auto;
    white-space: nowrap;
    user-select: all;
    transition: all 0.3s ease;
}

.val-display.placeholder {
    color: var(--muted-text);
    font-weight: 400;
    font-style: italic;
    user-select: none;
}

.copy-btn {
    min-width: 85px;
    font-weight: 600;
    border-radius: 6px;
    transition: all 0.2s ease;
}

.copy-btn.btn-copied {
    background-color: #28a745 !important;
    border-color: #28a745 !important;
    color: #ffffff !important;
}

.info-note {
    margin-top: 1.25rem;
    padding: 14px 16px;
    background-color: var(--time-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--muted-text);
    font-size: 0.9rem;
    line-height: 1.55;
}

.info-note code {
    color: var(--text-color);
}

/* Explanation / Markdown Article Styles */
.explanation-card {
    overflow: hidden;
}

.explanation-header {
    cursor: pointer;
    padding: 16px 20px;
    background-color: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    transition: background-color 0.2s ease;
    user-select: none;
}

.explanation-header:hover {
    background-color: var(--hover-bg);
}

.explanation-collapse.collapsed {
    display: none;
}

.toggle-icon {
    display: inline-block;
    transition: transform 0.25s ease;
    color: var(--muted-text);
    font-size: 0.85rem;
}

.toggle-status {
    font-size: 0.75rem;
    font-weight: 500;
    padding: 4px 8px;
    background-color: var(--hover-bg);
    border: 1px solid var(--border-color);
    color: var(--muted-text);
    border-radius: 4px;
}

.blog-banner {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-left: 4px solid #007bff;
    border-radius: 8px;
    padding: 12px 18px;
    margin-bottom: 20px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.08);
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    font-size: 0.95rem;
    transition: background-color 0.3s, border-color 0.3s;
}

.blog-banner .badge {
    font-size: 0.75rem;
    font-weight: 600;
    padding: 5px 9px;
}

.blog-banner a {
    color: var(--text-color);
    font-weight: 600;
    text-decoration: underline;
}

.blog-banner a:hover {
    color: #007bff;
}

.blog-callout {
    background-color: var(--time-bg);
    border: 1px solid var(--border-color);
    border-left: 4px solid #007bff;
    border-radius: 6px;
    padding: 12px 16px;
    margin-bottom: 20px;
    color: var(--text-color);
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
}

.blog-callout a {
    color: #007bff;
    font-weight: 600;
    text-decoration: underline;
}

.blog-callout a:hover {
    color: #0056b3;
}

.article-header {
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1rem;
    margin-bottom: 1.5rem;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
}

.article-header h2 {
    font-size: 1.6rem;
    font-weight: 700;
    margin: 0;
    color: var(--text-color);
}

.article-body h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-top: 1.8rem;
    margin-bottom: 0.75rem;
    color: var(--text-color);
}

.article-body h4 {
    font-size: 1.05rem;
    font-weight: 600;
    margin-top: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.article-body p {
    margin-bottom: 1rem;
    color: var(--text-color);
}

.article-body ol, .article-body ul {
    margin-bottom: 1rem;
    padding-left: 1.5rem;
    color: var(--text-color);
}

.article-body li {
    margin-bottom: 0.4rem;
}

code {
    background-color: var(--hover-bg);
    color: var(--accent);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
    font-size: 0.9em;
}

.code-card {
    background-color: var(--code-bg);
    border: 1px solid var(--code-border);
    border-radius: 6px;
    margin: 1.1rem 0;
    overflow: hidden;
}

.code-card-header {
    background-color: var(--code-header-bg);
    border-bottom: 1px solid var(--code-border);
    padding: 6px 12px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-family: 'JetBrains Mono', ui-monospace, monospace;
    font-size: 0.8rem;
    color: var(--muted-text);
}

.code-card-header .lang {
    text-transform: uppercase;
    font-weight: 600;
}

.code-card-header .btn-sm {
    padding: 2px 8px;
    font-size: 0.75rem;
}

.code-card pre {
    margin: 0;
    padding: 14px 16px;
    background: transparent;
    border: none;
    color: var(--text-color);
    font-family: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
    font-size: 0.88rem;
    line-height: 1.5;
    overflow-x: auto;
}

.code-card code {
    background: transparent;
    padding: 0;
    color: inherit;
    font-size: inherit;
}

/* Syntax highlighting classes */
.kwd { color: var(--syntax-keyword); font-weight: 600; }
.str { color: var(--syntax-string); }
.com { color: var(--syntax-comment); font-style: italic; }
.num { color: var(--syntax-number); }
.typ { color: var(--syntax-type); }

/* Footer */
.site-footer {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
    color: var(--muted-text);
    font-size: 0.85rem;
}

.site-footer a {
    color: #007bff;
    text-decoration: none;
}

.site-footer a:hover {
    text-decoration: underline;
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
    .nav-links {
        flex-direction: column;
        align-items: stretch;
        gap: 10px;
    }

    .nav-brand {
        text-align: center;
        margin-bottom: 10px;
    }

    #theme-toggle {
        position: static;
        align-self: flex-end;
    }

    .out-group {
        flex-direction: column;
    }

    .copy-btn {
        width: 100%;
    }

    .article-header {
        flex-direction: column;
        align-items: flex-start;
    }
}