/* ============================================
   VitaTab - Documentation Styles
   Premium dark-themed docs layout
   ============================================ */

/* ---- Navigation ---- */
.docs-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(15, 17, 23, 0.92);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-color);
    padding: 0 var(--spacing-lg);
    height: 56px;
}

.docs-nav-inner {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.docs-nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text-bright);
    font-weight: 700;
    font-size: 1.1rem;
}

.docs-nav-logo {
    display: flex;
    align-items: center;
}

.docs-nav-links {
    display: flex;
    gap: var(--spacing-md);
}

.docs-nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 500;
    transition: color 0.2s;
}

.docs-nav-links a:hover {
    color: var(--text-bright);
}

/* ---- Hero ---- */
.docs-hero {
    margin-top: 56px;
    padding: 72px var(--spacing-lg) 48px;
    background: linear-gradient(135deg, rgba(230, 57, 70, 0.06) 0%, rgba(67, 97, 238, 0.06) 50%, rgba(42, 157, 143, 0.04) 100%);
    border-bottom: 1px solid var(--border-color);
}

.docs-hero-inner {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.docs-hero-badge {
    display: inline-block;
    background: rgba(230, 57, 70, 0.12);
    color: var(--accent-primary);
    padding: 4px 14px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: var(--spacing-sm);
    border: 1px solid rgba(230, 57, 70, 0.2);
}

.docs-hero h1 {
    font-size: 2.4rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--text-bright), var(--accent-primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: var(--spacing-sm);
}

.docs-hero-sub {
    color: var(--text-muted);
    font-size: 1.05rem;
    line-height: 1.6;
}

/* ---- Layout ---- */
.docs-layout {
    display: flex;
    max-width: 1400px;
    margin: 0 auto;
    min-height: calc(100vh - 56px);
}

/* ---- Sidebar ---- */
.docs-sidebar {
    width: 260px;
    flex-shrink: 0;
    position: sticky;
    top: 56px;
    height: calc(100vh - 56px);
    overflow-y: auto;
    border-right: 1px solid var(--border-color);
    padding: var(--spacing-lg) 0;
    scrollbar-width: thin;
    scrollbar-color: var(--border-color) transparent;
}

.docs-sidebar-inner {
    padding: 0 var(--spacing-md);
}

.docs-sidebar-section {
    margin-bottom: var(--spacing-lg);
}

.docs-sidebar-title {
    font-size: 0.68rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    padding: 0 var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
}

.docs-sidebar-link {
    display: block;
    padding: 6px var(--spacing-sm);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.82rem;
    font-weight: 500;
    transition: all 0.15s;
    border-left: 2px solid transparent;
}

.docs-sidebar-link:hover {
    color: var(--text-bright);
    background: rgba(255, 255, 255, 0.03);
}

.docs-sidebar-link.active {
    color: var(--accent-primary);
    background: rgba(230, 57, 70, 0.06);
    border-left-color: var(--accent-primary);
}

/* ---- Content ---- */
.docs-content {
    flex: 1;
    min-width: 0;
    padding: var(--spacing-xl) var(--spacing-xl) 80px;
    max-width: 900px;
}

.docs-section {
    padding-top: 72px;
    margin-top: -56px;
    margin-bottom: var(--spacing-xl);
    scroll-margin-top: 72px;
}

.docs-section h2 {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--text-bright);
    margin-bottom: var(--spacing-sm);
    line-height: 1.3;
}

.docs-section h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-bright);
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
}

.docs-section h4 {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-bright);
    margin-bottom: var(--spacing-xs);
}

.docs-section p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
    font-size: 0.92rem;
}

.docs-section-badge {
    display: inline-block;
    background: rgba(67, 97, 238, 0.1);
    color: var(--accent-info);
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 0.68rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: var(--spacing-xs);
    border: 1px solid rgba(67, 97, 238, 0.15);
}

/* ---- Callouts ---- */
.docs-callout {
    display: flex;
    gap: 14px;
    padding: 16px 18px;
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
    border: 1px solid;
    font-size: 0.88rem;
}

.docs-callout p {
    margin: 4px 0 0;
    font-size: 0.85rem;
}

.docs-callout-icon {
    flex-shrink: 0;
    width: 22px;
    height: 22px;
    margin-top: 1px;
}

.docs-callout-icon svg {
    width: 22px;
    height: 22px;
}

.docs-callout-info {
    background: rgba(67, 97, 238, 0.05);
    border-color: rgba(67, 97, 238, 0.15);
}

.docs-callout-info .docs-callout-icon { color: var(--accent-info); }
.docs-callout-info strong { color: var(--accent-info); }

.docs-callout-tip {
    background: rgba(42, 157, 143, 0.05);
    border-color: rgba(42, 157, 143, 0.15);
}

.docs-callout-tip .docs-callout-icon { color: var(--accent-success); }
.docs-callout-tip strong { color: var(--accent-success); }

/* ---- Tables ---- */
.docs-table-wrapper {
    overflow-x: auto;
    margin-bottom: var(--spacing-md);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.docs-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.84rem;
}

.docs-table thead {
    background: rgba(255, 255, 255, 0.03);
}

.docs-table th {
    text-align: left;
    padding: 10px 14px;
    font-weight: 700;
    color: var(--text-bright);
    font-size: 0.76rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    border-bottom: 1px solid var(--border-color);
    white-space: nowrap;
}

.docs-table td {
    padding: 9px 14px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
    color: var(--text-secondary);
    vertical-align: top;
}

.docs-table td strong {
    color: var(--text-bright);
    font-weight: 600;
}

.docs-table tbody tr:hover {
    background: rgba(255, 255, 255, 0.02);
}

.docs-table tbody tr:last-child td {
    border-bottom: none;
}

.docs-table-compact td,
.docs-table-compact th {
    padding: 7px 12px;
}

/* ---- Steps ---- */
.docs-steps {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin: var(--spacing-md) 0;
}

.docs-step {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    padding: 14px 16px;
    background: rgba(255, 255, 255, 0.02);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.docs-step-number {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-primary), rgba(230, 57, 70, 0.7));
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 0.85rem;
    flex-shrink: 0;
}

.docs-step-content strong {
    color: var(--text-bright);
    display: block;
    margin-bottom: 2px;
    font-size: 0.88rem;
}

.docs-step-content p {
    margin: 0;
    color: var(--text-muted);
    font-size: 0.82rem;
}

/* ---- Grid ---- */
.docs-grid-2,
.docs-grid-3 {
    display: grid;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.docs-grid-2 { grid-template-columns: repeat(2, 1fr); }
.docs-grid-3 { grid-template-columns: repeat(3, 1fr); }

.docs-feature-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 20px;
    transition: border-color 0.2s, transform 0.2s;
}

.docs-feature-card:hover {
    border-color: rgba(230, 57, 70, 0.25);
    transform: translateY(-2px);
}

.docs-feature-card h4 {
    margin-bottom: var(--spacing-xs);
}

.docs-feature-card p {
    margin: 0;
    font-size: 0.84rem;
}

.docs-feature-icon {
    margin-bottom: var(--spacing-sm);
}

/* ---- Lists ---- */
.docs-list {
    padding-left: 20px;
    margin-bottom: var(--spacing-md);
}

.docs-list li {
    color: var(--text-secondary);
    font-size: 0.88rem;
    line-height: 1.7;
    margin-bottom: 4px;
}

.docs-list li strong {
    color: var(--text-bright);
}

.docs-list-numbered {
    list-style-type: decimal;
}

/* ---- Code Block ---- */
.docs-code {
    background: rgba(0, 0, 0, 0.35);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 16px 18px;
    margin-bottom: var(--spacing-md);
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
    font-size: 0.78rem;
    line-height: 1.8;
    overflow-x: auto;
    color: var(--text-secondary);
}

.docs-code code {
    display: block;
    white-space: nowrap;
}

/* ---- NACA Grid ---- */
.docs-naca-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.docs-naca-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 14px;
    text-align: center;
    transition: transform 0.15s;
}

.docs-naca-card:hover { transform: translateY(-2px); }

.docs-naca-num {
    font-size: 1.6rem;
    font-weight: 900;
    margin-bottom: 6px;
}

.docs-naca-text {
    font-size: 0.76rem;
    color: var(--text-muted);
    line-height: 1.5;
}

.docs-naca-text strong {
    display: block;
    color: var(--text-bright);
    font-size: 0.8rem;
    margin-bottom: 2px;
}

/* NACA Colors */
.naca-0 .docs-naca-num { color: #6c757d; }
.naca-1 .docs-naca-num { color: #2a9d8f; }
.naca-2 .docs-naca-num { color: #52b788; }
.naca-3 .docs-naca-num { color: #f59e0b; }
.naca-4 .docs-naca-num { color: #e67e22; }
.naca-5 .docs-naca-num { color: #e63946; }
.naca-6 .docs-naca-num { color: #c0392b; }
.naca-7 .docs-naca-num { color: #7f1d1d; }

.naca-0 { border-color: rgba(108, 117, 125, 0.2); }
.naca-1 { border-color: rgba(42, 157, 143, 0.2); }
.naca-2 { border-color: rgba(82, 183, 136, 0.2); }
.naca-3 { border-color: rgba(245, 158, 11, 0.2); }
.naca-4 { border-color: rgba(230, 126, 34, 0.2); }
.naca-5 { border-color: rgba(230, 57, 70, 0.2); }
.naca-6 { border-color: rgba(192, 57, 43, 0.2); }
.naca-7 { border-color: rgba(127, 29, 29, 0.2); }

/* ---- Footer ---- */
.docs-footer {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.docs-footer p {
    color: var(--text-muted);
    font-size: 0.8rem;
}

.docs-footer a {
    color: var(--accent-primary);
    text-decoration: none;
}

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

/* ---- Responsive ---- */
@media (max-width: 1024px) {
    .docs-grid-3 { grid-template-columns: repeat(2, 1fr); }
    .docs-naca-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .docs-sidebar { display: none; }
    .docs-content { padding: var(--spacing-md); }
    .docs-hero { padding: 48px var(--spacing-md) 32px; }
    .docs-hero h1 { font-size: 1.6rem; }
    .docs-grid-2,
    .docs-grid-3 { grid-template-columns: 1fr; }
    .docs-naca-grid { grid-template-columns: repeat(2, 1fr); }
    .docs-nav-links { display: none; }
    .docs-section h2 { font-size: 1.3rem; }
}