:root {
    --bg-color: #0b1120;
    --card-bg: #131c31;
    --card-border: #1e293b;
    --text-color: #e2e8f0;
    --text-muted: #94a3b8;
    --accent-color: #38bdf8;
    --accent-hover: #0284c7;
    --header-bg: #0f172a;
    --code-bg: #090d16;
}

.light-theme {
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --card-border: #e2e8f0;
    --text-color: #0f172a;
    --text-muted: #64748b;
    --accent-color: #0284c7;
    --accent-hover: #0369a1;
    --header-bg: #f1f5f9;
    --code-bg: #f8fafc;
}

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

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

header {
    background-color: var(--header-bg);
    border-bottom: 1px solid var(--card-border);
    padding: 1.5rem 0 0 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-flex {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
    padding-bottom: 1rem;
}

h1 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-color);
}

.subtitle {
    color: var(--accent-color);
    font-size: 0.95rem;
    font-weight: 500;
}

.header-actions {
    display: flex;
    gap: 0.75rem;
}

nav {
    display: flex;
    gap: 1.5rem;
    border-top: 1px solid var(--card-border);
    padding: 0.75rem 0;
    overflow-x: auto;
}

nav a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.2s ease;
}

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

main {
    padding-top: 2rem;
    padding-bottom: 3rem;
}

section {
    margin-bottom: 2.5rem;
}

h2 {
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 1rem;
    display: inline-block;
    border-bottom: 2px solid var(--accent-color);
    padding-bottom: 0.25rem;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.25rem;
}

.card {
    background-color: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    padding: 1.25rem;
    transition: border-color 0.2s ease;
}

.card:hover {
    border-color: var(--accent-color);
}

.card h3 {
    font-size: 1.1rem;
    color: var(--accent-color);
    margin-bottom: 0.5rem;
}

.card p, .card ul {
    color: var(--text-muted);
    font-size: 0.95rem;
}

.card ul {
    margin-top: 0.5rem;
    padding-left: 1.25rem;
}

.status-card {
    background-color: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    padding: 0.75rem 1.25rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem;
    font-size: 0.9rem;
}

.status-left {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.status-indicator {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    display: inline-block;
}

.status-indicator.online {
    background-color: #10b981;
    box-shadow: 0 0 8px rgba(16, 185, 129, 0.6);
}

.status-domain code {
    background-color: var(--code-bg);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    border: 1px solid var(--card-border);
    color: var(--accent-color);
}

.case-study-card h3 {
    color: var(--accent-color);
    margin-top: 1rem;
}

.case-study-card h3:first-child {
    margin-top: 0;
}

pre {
    background-color: var(--code-bg);
    border: 1px solid var(--card-border);
    border-radius: 6px;
    padding: 1rem;
    overflow-x: auto;
}

code {
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    font-size: 0.875rem;
}

.btn, .btn-secondary {
    display: inline-flex;
    align-items: center;
    padding: 0.4rem 0.85rem;
    border-radius: 6px;
    font-size: 0.875rem;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: background-color 0.2s ease, border-color 0.2s ease;
}

.btn {
    background-color: var(--accent-color);
    color: #ffffff;
    border: none;
}

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

.btn-secondary {
    background-color: transparent;
    color: var(--text-color);
    border: 1px solid var(--card-border);
}

.btn-secondary:hover {
    border-color: var(--accent-color);
}

footer {
    border-top: 1px solid var(--card-border);
    padding: 1.5rem 0;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* --- Mermaid Diagram Fixes --- */
.mermaid {
    display: flex;
    justify-content: center;
    padding: 1rem 0;
    overflow-x: auto;
}

.mermaid svg {
    max-width: 100% !important;
    height: auto !important;
}

.mermaid .cluster text {
    fill: var(--text-color) !important;
    font-weight: 600 !important;
    font-size: 0.95rem !important;
    transform: translateY(-6px);
}

.mermaid .cluster rect {
    stroke: var(--card-border) !important;
    rx: 8px !important;
    ry: 8px !important;
}