/* ========================================
   Global Styles
   ======================================== */

:root {
    --primary-color: #FF9900;
    --primary-dark: #EC7211;
    --secondary-color: #232F3E;
    --success-color: #28A745;
    --danger-color: #DC3545;
    --warning-color: #FFC107;
    --info-color: #007BFF;
    --purple-color: #6F42C1;
    
    --bg-color: #0F1419;
    --bg-secondary: #1A1F2E;
    --bg-card: #232F3E;
    --bg-hover: #2A3648;
    
    --text-primary: #FFFFFF;
    --text-secondary: #AAB7C4;
    --text-muted: #6B7688;
    
    --border-color: #3B4659;
    --border-radius: 8px;
    
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.5);
    
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

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

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

/* ========================================
   Typography
   ======================================== */

h1, h2, h3, h4, h5, h6 {
    margin-bottom: 0.75rem;
    font-weight: 600;
    line-height: 1.2;
}

h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }

.subtitle {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-top: -0.5rem;
    margin-bottom: 1rem;
}

/* ========================================
   Layout
   ======================================== */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

.page-header {
    margin-bottom: 2rem;
}

/* ========================================
   Navbar
   ======================================== */

.navbar {
    background-color: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow-sm);
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

.navbar-menu {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.user-name {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ========================================
   Cards
   ======================================== */

.card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    margin-bottom: 1.5rem;
    overflow: hidden;
}

.card-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-header h2 {
    margin: 0;
    font-size: 1.25rem;
}

.card-subtitle {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin: 0.25rem 0 0 0;
}

.card-body {
    padding: 1.5rem;
}

/* ========================================
   Stats Grid
   ======================================== */

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s;
}

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

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.stat-content {
    flex: 1;
}

.stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

/* ========================================
   Forms
   ======================================== */

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    font-weight: 500;
    font-size: 0.95rem;
}

.form-group input[type="text"],
.form-group input[type="password"],
.form-group input[type="url"] {
    width: 100%;
    padding: 0.75rem 1rem;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    color: var(--text-primary);
    font-size: 0.95rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(255, 153, 0, 0.1);
}

.form-hint {
    display: block;
    margin-top: 0.375rem;
    color: var(--text-muted);
    font-size: 0.85rem;
}

.url-input-row {
    display: flex;
    gap: 0.75rem;
    align-items: center;
}

.url-input-row input[type="url"] {
    flex: 1;
}

.url-submit-btn {
    white-space: nowrap;
    height: 44px;
}

/* ========================================
   Buttons
   ======================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    font-size: 0.95rem;
    font-weight: 500;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-primary {
    background-color: var(--primary-color);
    color: #000;
}

.btn-primary:hover:not(:disabled) {
    background-color: var(--primary-dark);
}

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

.btn-secondary:hover:not(:disabled) {
    background-color: var(--bg-hover);
}

.btn-sm {
    padding: 0.5rem 0.875rem;
    font-size: 0.875rem;
}

.btn-block {
    width: 100%;
}

.spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

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

/* ========================================
   Tables
   ======================================== */

.table-container {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
}

thead {
    background-color: var(--bg-secondary);
}

th {
    padding: 0.875rem 1rem;
    text-align: left;
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 2px solid var(--border-color);
}

td {
    padding: 0.875rem 1rem;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

tbody tr:hover {
    background-color: var(--bg-hover);
}

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

.loading {
    text-align: center;
    color: var(--text-muted);
    font-style: italic;
}

/* ========================================
   Status Badges
   ======================================== */

.badge {
    display: inline-block;
    padding: 0.25rem 0.625rem;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 4px;
    text-transform: uppercase;
}

.badge-success {
    background-color: rgba(40, 167, 69, 0.2);
    color: var(--success-color);
}

.badge-danger {
    background-color: rgba(220, 53, 69, 0.2);
    color: var(--danger-color);
}

.rank-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    font-weight: 700;
    font-size: 0.875rem;
}

.rank-1 { background: linear-gradient(135deg, #FFD700, #FFA500); color: #000; }
.rank-2 { background: linear-gradient(135deg, #C0C0C0, #808080); color: #000; }
.rank-3 { background: linear-gradient(135deg, #CD7F32, #8B4513); color: #fff; }
.rank-other { background-color: var(--bg-secondary); color: var(--text-secondary); }

/* ========================================
   Alert Messages
   ======================================== */

.alert {
    padding: 1rem 1.25rem;
    border-radius: var(--border-radius);
    margin-bottom: 1rem;
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
}

.alert-success {
    background-color: rgba(40, 167, 69, 0.15);
    border-left: 4px solid var(--success-color);
    color: var(--success-color);
}

.alert-error {
    background-color: rgba(220, 53, 69, 0.15);
    border-left: 4px solid var(--danger-color);
    color: var(--danger-color);
}

.error-message {
    padding: 0.875rem 1rem;
    background-color: rgba(220, 53, 69, 0.15);
    border-left: 4px solid var(--danger-color);
    color: var(--danger-color);
    border-radius: var(--border-radius);
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

/* ========================================
   Login Page
   ======================================== */

.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #0F1419 0%, #1A1F2E 100%);
}

.login-container {
    width: 100%;
    max-width: 420px;
    padding: 2rem 1.5rem;
}

.login-header {
    text-align: center;
    margin-bottom: 2rem;
}

.logo {
    display: flex;
    justify-content: center;
    margin-bottom: 1rem;
}

.login-header h1 {
    font-size: 1.75rem;
    margin-bottom: 0.5rem;
}

.login-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: var(--shadow-lg);
}

.login-card h2 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    text-align: center;
}

.login-footer {
    margin-top: 1.5rem;
    text-align: center;
}

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

.page-footer {
    margin-top: 2rem;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* ========================================
   Responsive Design
   ======================================== */

@media (max-width: 768px) {
    .container {
        padding: 1.5rem 1rem;
    }
    
    .navbar {
        flex-direction: column;
        gap: 1rem;
    }
    
    .navbar-brand {
        width: 100%;
        justify-content: center;
    }
    
    .navbar-menu {
        width: 100%;
        justify-content: center;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .card-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
    }

    .url-input-row {
        flex-direction: column;
        align-items: stretch;
    }
    
    .table-container {
        font-size: 0.85rem;
    }
    
    th, td {
        padding: 0.625rem 0.75rem;
    }
}

/* ========================================
   Utilities
   ======================================== */

.text-center { text-align: center; }
.text-right { text-align: right; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }

.scoreboard-footer {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.875rem;
}