/* ============================================
   GitHub Ladder - Theme Styles
   ============================================ */

/* CSS Custom Properties - Dark Theme (Default) */
:root {
    /* Colors */
    --color-bg-primary: #0d1117;
    --color-bg-secondary: #161b22;
    --color-bg-tertiary: #21262d;
    --color-bg-glass: rgba(22, 27, 34, 0.8);

    --color-text-primary: #f0f6fc;
    --color-text-secondary: #8b949e;
    --color-text-muted: #6e7681;

    --color-accent-primary: #000091;
    --color-accent-secondary: #000080;
    --color-accent-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);

    --color-success: #3fb950;
    --color-warning: #d29922;
    --color-error: #f85149;

    --color-border: #30363d;
    --color-border-light: rgba(240, 246, 252, 0.1);

    /* Chart Colors */
    --chart-color-1: #58a6ff;
    --chart-color-2: #3fb950;
    --chart-color-3: #d29922;
    --chart-color-4: #f85149;
    --chart-color-5: #a371f7;
    --chart-color-6: #db61a2;
    --chart-color-7: #79c0ff;
    --chart-color-8: #7ee787;
    --chart-color-9: #e3b341;
    --chart-color-10: #ff7b72;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px rgba(88, 166, 255, 0.3);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 400ms ease;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
}

/* Light Theme */
[data-theme="light"] {
    --color-bg-primary: #ffffff;
    --color-bg-secondary: #f6f8fa;
    --color-bg-tertiary: #eaeef2;
    --color-bg-glass: rgba(255, 255, 255, 0.9);

    --color-text-primary: #1f2328;
    --color-text-secondary: #656d76;
    --color-text-muted: #8c959f;

    --color-accent-primary: #0969da;
    --color-accent-secondary: #166fdd;
    --color-accent-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);

    --color-success: #1a7f37;
    --color-warning: #9a6700;
    --color-error: #cf222e;

    --color-border: #d0d7de;
    --color-border-light: rgba(31, 35, 40, 0.1);

    /* Chart Colors - slightly darker for light theme */
    --chart-color-1: #0969da;
    --chart-color-2: #1a7f37;
    --chart-color-3: #9a6700;
    --chart-color-4: #cf222e;
    --chart-color-5: #8250df;
    --chart-color-6: #bf3989;
    --chart-color-7: #0550ae;
    --chart-color-8: #116329;
    --chart-color-9: #7d4e00;
    --chart-color-10: #a40e26;

    /* Shadows - lighter for light theme */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
    --shadow-glow: 0 0 20px rgba(9, 105, 218, 0.2);
}

/* Theme Toggle Button */
.theme-toggle {
    position: fixed;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--color-bg-glass);
    backdrop-filter: blur(10px);
    border: 1px solid var(--color-border);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    transition: all var(--transition-normal);
    z-index: 1000;
    box-shadow: var(--shadow-md);
}

.theme-toggle:hover {
    transform: scale(1.1);
    border-color: var(--color-accent-primary);
    box-shadow: var(--shadow-glow);
}

.theme-toggle .icon-sun,
.theme-toggle .icon-moon {
    position: absolute;
    transition: opacity var(--transition-normal), transform var(--transition-normal);
}

/* Dark theme: show sun icon */
:root:not([data-theme="light"]) .theme-toggle .icon-sun {
    opacity: 1;
    transform: rotate(0deg);
}

:root:not([data-theme="light"]) .theme-toggle .icon-moon {
    opacity: 0;
    transform: rotate(-90deg);
}

/* Light theme: show moon icon */
[data-theme="light"] .theme-toggle .icon-sun {
    opacity: 0;
    transform: rotate(90deg);
}

[data-theme="light"] .theme-toggle .icon-moon {
    opacity: 1;
    transform: rotate(0deg);
}

/* Mobile-specific */
@media (max-width: 768px) {
    .theme-toggle {
        top: auto;
        bottom: var(--spacing-lg);
    }
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background: var(--color-bg-primary);
    color: var(--color-text-primary);
    line-height: 1.6;
    min-height: 100vh;
    background-image:
        radial-gradient(ellipse at top, rgba(88, 166, 255, 0.1) 0%, transparent 50%),
        radial-gradient(ellipse at bottom right, rgba(118, 75, 162, 0.1) 0%, transparent 50%);
}

/* App Container */
.app {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-lg);
}

/* Header */
.header {
    text-align: center;
    padding: var(--spacing-2xl) var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    background: var(--color-bg-glass);
    backdrop-filter: blur(10px);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
    margin-bottom: var(--spacing-md);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo-icon {
    font-size: 2.5rem;
    animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-5px); }
}

.header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--color-accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header-info {
    display: flex;
    gap: var(--spacing-sm);
}

.org-badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: all var(--transition-fast);
}

.org-badge:hover {
    border-color: var(--color-accent-primary);
    color: var(--color-accent-primary);
}

.subtitle {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-sm);
}

.last-updated {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

/* Controls */
.controls {
    display: flex;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
    justify-content: center;
    padding: var(--spacing-lg);
    background: var(--color-bg-glass);
    backdrop-filter: blur(10px);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-xl);
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.control-group label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-secondary);
}

.select {
    appearance: none;
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: var(--spacing-sm) var(--spacing-lg) var(--spacing-sm) var(--spacing-md);
    color: var(--color-text-primary);
    font-family: var(--font-family);
    font-size: 0.875rem;
    cursor: pointer;
    min-width: 140px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%238b949e' d='M2 4l4 4 4-4'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    transition: all var(--transition-fast);
}

.select:hover, .select:focus {
    border-color: var(--color-accent-primary);
    outline: none;
}

.toggle-group {
    display: flex;
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-sm);
    overflow: hidden;
    border: 1px solid var(--color-border);
}

.toggle-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    background: transparent;
    border: none;
    color: var(--color-text-secondary);
    font-family: var(--font-family);
    font-size: 0.875rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.toggle-btn.active {
    background: var(--color-accent-secondary);
    color: var(--color-text-primary);
}

/* Main Content */
.main-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

/* Section Title */
.section-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

/* Chart Section */
/* KPI Section */
.kpi-section {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

/* Shared Card Style */
.card {
    background: var(--color-bg-glass);
    backdrop-filter: blur(10px);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
}

.kpi-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    transition: transform var(--transition-fast);
}

.kpi-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.kpi-icon {
    font-size: 2rem;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-md);
}

.kpi-content h3 {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
}

.kpi-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text-primary);
    line-height: 1;
}

/* Chart Section & Users Section visuals handled by .card class */
/* Layout handled by grid/flex containers */

.chart-container {
    position: relative;
    height: 400px;
    width: 100%;
}

.users-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

/* User Card */
.user-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
}

.user-card:hover {
    border-color: var(--color-accent-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.user-rank {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text-muted);
    min-width: 2rem;
    text-align: center;
}

.user-rank.gold { color: #ffd700; }
.user-rank.silver { color: #c0c0c0; }
.user-rank.bronze { color: #cd7f32; }

.user-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: 2px solid var(--color-border);
    transition: border-color var(--transition-fast);
}

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

.user-info {
    flex: 1;
    min-width: 0;
}

.user-name {
    font-weight: 600;
    font-size: 0.9375rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.user-name a {
    color: var(--color-text-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.user-name a:hover {
    color: var(--color-accent-primary);
}

.user-stats {
    display: flex;
    gap: var(--spacing-md);
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
}

.stat-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.stat-value {
    font-weight: 600;
    color: var(--color-text-primary);
}

/* Footer */
.footer {
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-lg);
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

.footer-links {
    margin-top: var(--spacing-sm);
}

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

.footer-links a:hover {
    color: var(--color-text-primary);
}

.footer-links span {
    margin: 0 var(--spacing-sm);
}

.copyright {
    margin-top: var(--spacing-md);
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

.copyright a {
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.copyright a:hover {
    color: var(--color-accent-primary);
}

/* Loading State */
.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    padding: var(--spacing-2xl);
    color: var(--color-text-secondary);
}

.spinner {
    width: 24px;
    height: 24px;
    border: 3px solid var(--color-border);
    border-top-color: var(--color-accent-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Error State */
.error-message {
    text-align: center;
    padding: var(--spacing-2xl);
    color: var(--color-error);
}

/* Responsive */
@media (max-width: 768px) {
    .app {
        padding: var(--spacing-md);
    }

    .header {
        padding: var(--spacing-lg);
    }

    .header h1 {
        font-size: 1.75rem;
    }

    .controls {
        flex-direction: column;
        align-items: stretch;
    }

    .control-group {
        width: 100%;
    }

    .select {
        width: 100%;
    }

    .toggle-group {
        width: 100%;
    }

    .toggle-btn {
        flex: 1;
    }

    .chart-container {
        height: 300px;
    }

    .kpi-section {
        grid-template-columns: 1fr;
    }

    .users-grid {
        grid-template-columns: 1fr;
    }
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-text-muted);
}