/* ============================================
   Custom CSS for Tennis Knowledge Vault
   Theme: Matching tennis-unified (tenniskb.github.io/tennis-unified)
   Colors: Teal primary (#009688 / #4CAF50), Blue accent (#2196F3 / #03A9F4)
   ============================================ */

/* Import the tennis-unified color scheme */
:root {
    /* Primary colors - matching tennis-unified (MkDocs Material teal/blue) */
    --tk-primary: #009688;           /* Teal - primary color */
    --tk-primary-light: #4CAF50;     /* Lighter teal */
    --tk-primary-dark: #00796B;      /* Darker teal */
    --tk-primary-contrast: #ffffff;  /* Text on primary */
    
    --tk-accent: #2196F3;            /* Blue - accent color */
    --tk-accent-light: #64B5F6;      /* Lighter blue */
    --tk-accent-dark: #1976D2;       /* Darker blue */
    
    /* Background & Text */
    --tk-bg: #fafafa;                /* Light background */
    --tk-bg-alt: #ffffff;            /* Card background */
    --tk-text: #212121;              /* Primary text */
    --tk-text-light: #757575;        /* Secondary text */
    --tk-text-lighter: #9e9e9e;      /* Tertiary text */
    --tk-border: #e0e0e0;            /* Borders */
    --tk-divider: #ececec;           /* Dividers */
    
    /* Bootstrap overrides */
    --primary: var(--tk-primary);
    --primary-dark: var(--tk-primary-dark);
    --secondary: var(--tk-text-light);
    --success: var(--tk-primary);
    --info: var(--tk-accent);
    --warning: #ff9800;
    --danger: #f44336;
    --light: var(--tk-bg);
    --dark: var(--tk-text);
}

/* ============================================
   Navigation Bar
   ============================================ */
.navbar {
    background-color: var(--tk-primary) !important;
    border-bottom: 1px solid rgba(0,0,0,0.08);
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.navbar .navbar-brand {
    color: var(--tk-primary-contrast) !important;
    font-weight: 700;
    font-size: 1.2rem;
}

.navbar .navbar-brand:hover {
    color: var(--tk-primary-contrast) !important;
}

.navbar .nav > li > a {
    color: rgba(255,255,255,0.85) !important;
    font-weight: 500;
    padding: 12px 16px;
    transition: color 0.2s ease;
}

.navbar .nav > li > a:hover,
.navbar .nav > li > a:focus {
    color: #fff !important;
    background-color: rgba(255,255,255,0.08);
}

.navbar .nav > li.active > a {
    color: #fff !important;
    background-color: rgba(255,255,255,0.12);
}

.navbar .dropdown-menu {
    background-color: var(--tk-bg-alt);
    border: 1px solid var(--tk-border);
    border-radius: 8px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.12);
    margin-top: 8px;
    padding: 8px 0;
}

.navbar .dropdown-item {
    color: var(--tk-text);
    padding: 10px 20px;
    font-weight: 500;
    transition: all 0.15s ease;
}

.navbar .dropdown-item:hover,
.navbar .dropdown-item:focus {
    background-color: var(--tk-primary-light);
    color: var(--tk-primary-contrast);
}

.navbar .dropdown-divider {
    border-top: 1px solid var(--tk-divider);
    margin: 8px 0;
}

.navbar .dropdown-submenu > .dropdown-menu {
    margin-left: 0;
    margin-top: -4px;
    border-radius: 8px;
}

.navbar .dropdown-submenu > a::after {
    border-left-color: var(--tk-text-light);
}

.navbar .dropdown-submenu:hover > a::after {
    border-left-color: #fff;
}

/* ============================================
   Body & Typography
   ============================================ */
body {
    background-color: var(--tk-bg);
    color: var(--tk-text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.7;
    font-size: 16px;
}

/* ============================================
   Headings
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    color: var(--tk-text);
    font-weight: 600;
    line-height: 1.3;
    margin-top: 1.5em;
    margin-bottom: 0.5em;
}

h1 {
    font-size: 2.5rem;
    border-bottom: 3px solid var(--tk-primary);
    padding-bottom: 0.4em;
    margin-bottom: 0.8em;
}

h2 {
    font-size: 2rem;
    border-bottom: 1px solid var(--tk-divider);
    padding-bottom: 0.3em;
    margin-top: 2em;
}

h3 {
    font-size: 1.5rem;
    color: var(--tk-primary);
}

h4 {
    font-size: 1.25rem;
    color: var(--tk-primary-dark);
}

/* ============================================
   Links
   ============================================ */
a {
    color: var(--tk-primary);
    text-decoration: none;
    transition: color 0.15s ease;
}

a:hover {
    color: var(--tk-accent);
    text-decoration: underline;
}

a:focus {
    outline: 2px solid var(--tk-accent);
    outline-offset: 2px;
    border-radius: 2px;
}

/* ============================================
   Sidebar
   ============================================ */
.sidebar {
    background-color: var(--tk-bg-alt);
    border-right: 1px solid var(--tk-border);
    padding: 24px;
    border-radius: 0 8px 8px 0;
}

.sidebar .nav {
    margin-bottom: 24px;
}

.sidebar .nav > li > a {
    color: var(--tk-text);
    padding: 10px 14px;
    border-radius: 6px;
    display: block;
    font-weight: 500;
    transition: all 0.15s ease;
}

.sidebar .nav > li > a:hover {
    background-color: var(--tk-primary);
    color: var(--tk-primary-contrast);
}

.sidebar .nav > li.active > a {
    background-color: var(--tk-primary);
    color: var(--tk-primary-contrast);
    font-weight: 600;
}

/* ============================================
   Buttons
   ============================================ */
.btn {
    padding: 12px 24px;
    font-weight: 600;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
    border: 2px solid transparent;
}

.btn-primary {
    background-color: var(--tk-primary);
    color: var(--tk-primary-contrast);
    border-color: var(--tk-primary);
}

.btn-primary:hover {
    background-color: var(--tk-primary-dark);
    border-color: var(--tk-primary-dark);
    color: var(--tk-primary-contrast);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 150, 136, 0.3);
}

.btn-secondary {
    background-color: var(--tk-bg-alt);
    color: var(--tk-text);
    border-color: var(--tk-border);
}

.btn-secondary:hover {
    background-color: var(--tk-bg);
    border-color: var(--tk-text-light);
    color: var(--tk-primary);
}

.btn-accent {
    background-color: var(--tk-accent);
    color: white;
    border-color: var(--tk-accent);
}

.btn-accent:hover {
    background-color: var(--tk-accent-dark);
    border-color: var(--tk-accent-dark);
    color: white;
}

/* ============================================
   Cards (for feature sections)
   ============================================ */
.card {
    background-color: var(--tk-bg-alt);
    border: 1px solid var(--tk-border);
    border-radius: 10px;
    padding: 28px;
    margin-bottom: 24px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
    transition: all 0.3s ease;
}

.card:hover {
    box-shadow: 0 8px 24px rgba(0,0,0,0.08);
    transform: translateY(-2px);
}

.card h3 {
    color: var(--tk-primary);
    margin-top: 0;
}

/* ============================================
   Code blocks
   ============================================ */
pre {
    background-color: #263238;
    border: 1px solid var(--tk-border);
    border-radius: 8px;
    padding: 20px;
    overflow-x: auto;
    box-shadow: inset 0 1px 3px rgba(0,0,0,0.1);
}

pre code {
    background-color: transparent;
    padding: 0;
    border-radius: 0;
    font-size: 0.9em;
    color: #eceff1;
}

code {
    background-color: var(--tk-bg);
    padding: 3px 6px;
    border-radius: 4px;
    font-size: 0.9em;
    color: var(--tk-primary-dark);
    border: 1px solid var(--tk-divider);
}

/* ============================================
   Tables
   ============================================ */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 24px 0;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}

table th,
table td {
    border: 1px solid var(--tk-divider);
    padding: 14px 16px;
    text-align: left;
}

table th {
    background-color: var(--tk-primary);
    color: var(--tk-primary-contrast);
    font-weight: 600;
    font-size: 0.95rem;
}

table tr:nth-child(even) {
    background-color: var(--tk-bg);
}

table tr:hover {
    background-color: rgba(0, 150, 136, 0.04);
}

/* ============================================
   Blockquotes
   ============================================ */
blockquote {
    border-left: 4px solid var(--tk-primary);
    padding-left: 24px;
    margin: 1.5em 0;
    color: var(--tk-text-light);
    font-style: italic;
    background-color: rgba(0, 150, 136, 0.03);
    border-radius: 0 8px 8px 0;
    padding: 16px 24px;
}

/* ============================================
   Footer
   ============================================ */
footer {
    border-top: 1px solid var(--tk-divider);
    padding: 32px 0;
    margin-top: 48px;
    text-align: center;
    color: var(--tk-text-light);
    background-color: var(--tk-bg-alt);
}

footer a {
    color: var(--tk-primary);
    font-weight: 500;
}

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

/* ============================================
   Search
   ============================================ */
.search-form {
    margin: 24px 0;
}

.search-input {
    padding: 12px 18px;
    border: 2px solid var(--tk-border);
    border-radius: 8px;
    width: 100%;
    max-width: 480px;
    font-size: 1rem;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.search-input:focus {
    outline: none;
    border-color: var(--tk-primary);
    box-shadow: 0 0 0 3px rgba(0, 150, 136, 0.15);
}

/* ============================================
   Form elements
   ============================================ */
input, select, textarea {
    padding: 12px 16px;
    border: 2px solid var(--tk-border);
    border-radius: 6px;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--tk-primary);
    box-shadow: 0 0 0 3px rgba(0, 150, 136, 0.15);
}

/* ============================================
   Admonitions / Alert boxes
   ============================================ */
.admonition, .alert {
    border-radius: 8px;
    border-left-width: 4px;
    margin: 1.5em 0;
    padding: 16px 20px;
}

.admonition.note, .alert-info {
    background-color: rgba(33, 150, 243, 0.1);
    border-left-color: var(--tk-accent);
}

.admonition.warning, .alert-warning {
    background-color: rgba(255, 152, 0, 0.1);
    border-left-color: #ff9800;
}

.admonition.danger, .alert-danger {
    background-color: rgba(244, 67, 54, 0.1);
    border-left-color: #f44336;
}

.admonition.success, .alert-success {
    background-color: rgba(0, 150, 136, 0.1);
    border-left-color: var(--tk-primary);
}

.admonition-title {
    font-weight: 700;
    margin-bottom: 0.5em;
    color: var(--tk-text);
}

/* ============================================
   Responsive adjustments
   ============================================ */
@media (max-width: 768px) {
    .navbar .nav > li > a {
        padding: 10px 15px;
    }
    
    .sidebar {
        display: none;
    }
    
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.35rem; }
    
    .card { padding: 20px; }
    
    table { font-size: 0.9rem; }
    table th, table td { padding: 10px 12px; }
}

/* ============================================
   Custom utility classes
   ============================================ */
.text-center { text-align: center; }
.text-primary { color: var(--tk-primary) !important; }
.text-accent { color: var(--tk-accent) !important; }
.text-muted { color: var(--tk-text-light) !important; }

.bg-primary { background-color: var(--tk-primary) !important; }
.bg-accent { background-color: var(--tk-accent) !important; }
.bg-light { background-color: var(--tk-bg) !important; }
.bg-white { background-color: var(--tk-bg-alt) !important; }

.rounded { border-radius: 8px; }
.rounded-lg { border-radius: 12px; }
.rounded-xl { border-radius: 16px; }

.shadow-sm { box-shadow: 0 1px 3px rgba(0,0,0,0.05); }
.shadow { box-shadow: 0 4px 12px rgba(0,0,0,0.08); }
.shadow-lg { box-shadow: 0 8px 24px rgba(0,0,0,0.12); }

.mt-4 { margin-top: 2rem; }
.mb-4 { margin-bottom: 2rem; }
.pt-2 { padding-top: 1rem; }
.pb-2 { padding-bottom: 1rem; }
.px-4 { padding-left: 2rem; padding-right: 2rem; }
.py-4 { padding-top: 2rem; padding-bottom: 2rem; }

/* ============================================
   Container max-width
   ============================================ */
.container {
    max-width: 900px;
}

/* ============================================
   Knowledge Graph specific
   ============================================ */
.graph-view {
    background-color: var(--tk-bg-alt);
    border: 1px solid var(--tk-border);
    border-radius: 10px;
    padding: 8px;
}

.graph-loading {
    text-align: center;
    padding: 40px;
    color: var(--tk-text-light);
    font-size: 1.1rem;
}

.graph-tooltip {
    background-color: var(--tk-text);
    color: var(--tk-bg-alt);
    padding: 10px 14px;
    border-radius: 6px;
    font-size: 0.85rem;
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
    pointer-events: none;
    z-index: 100;
}

.graph-controls {
    display: flex;
    gap: 8px;
    margin-bottom: 12px;
    padding: 0 8px;
}

.graph-controls button {
    padding: 8px 16px;
    background-color: var(--tk-bg);
    border: 1px solid var(--tk-border);
    border-radius: 6px;
    font-size: 0.8rem;
    color: var(--tk-text);
    cursor: pointer;
    transition: all 0.15s ease;
}

.graph-controls button:hover,
.graph-controls button.active {
    background-color: var(--tk-primary);
    color: var(--tk-primary-contrast);
    border-color: var(--tk-primary);
}

.graph-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding: 0 8px 8px;
    font-size: 0.75rem;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    background-color: var(--tk-bg);
    border: 1px solid var(--tk-border);
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.15s ease;
}

.legend-item:hover {
    background-color: var(--tk-primary);
    color: var(--tk-primary-contrast);
    border-color: var(--tk-primary);
}

.legend-item.disabled {
    opacity: 0.4;
}

.legend-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    flex-shrink: 0;
}

/* ============================================
   Print styles
   ============================================ */
@media print {
    .navbar, .sidebar, footer, .btn, .search-form {
        display: none !important;
    }
    
    body {
        background-color: white;
        font-size: 12pt;
    }
    
    .container {
        max-width: 100%;
    }
    
    a {
        color: #000 !important;
        text-decoration: underline !important;
    }
    
    a[href^="http"]:after {
        content: " (" attr(href) ")";
        font-size: 9pt;
        color: #666;
    }
}