/* FIFA World Cup Predictions - Main Stylesheet */

/* ============================================================================
   ROOT VARIABLES
   ============================================================================ */
:root {
    /* Colors */
    --primary-color: #007bff;
    --secondary-color: #6c757d;
    --success-color: #28a745;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    --info-color: #17a2b8;
    --light-color: #f8f9fa;
    --dark-color: #343a40;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-success: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    
    /* Typography */
    --font-heading: 'Roboto', 'Segoe UI', sans-serif;
    --font-body: 'Open Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'Courier New', monospace;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px rgba(0,0,0,0.1);
    --shadow-xl: 0 20px 25px rgba(0,0,0,0.15);
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ============================================================================
   GLOBAL STYLES
   ============================================================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--dark-color);
    background-color: #f5f7fa;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

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

a:hover {
    color: #0056b3;
    text-decoration: none;
}

.main-content {
    flex: 1;
    padding-top: 80px; /* Account for fixed navbar */
    padding-bottom: var(--spacing-xl);
}

/* ============================================================================
   NAVIGATION
   ============================================================================ */
.navbar {
    background: linear-gradient(135deg, #0066cc, #004c99) !important;
    box-shadow: var(--shadow-md);
    padding: var(--spacing-sm) 0;
    transition: all var(--transition-base);
}

.navbar-brand {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: white !important;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.navbar-brand:hover {
    color: rgba(255, 255, 255, 0.9) !important;
}

.navbar-brand img {
    height: 35px;
    width: auto;
}

.nav-link {
    color: rgba(255, 255, 255, 0.9) !important;
    font-weight: 500;
    padding: 0.5rem 1rem !important;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    position: relative;
}

.nav-link:hover {
    color: white !important;
    background-color: rgba(255, 255, 255, 0.1);
}

.nav-link.active {
    color: white !important;
    background-color: rgba(255, 255, 255, 0.2);
    font-weight: 600;
}

.navbar-nav .dropdown-menu {
    border: none;
    box-shadow: var(--shadow-lg);
    border-radius: var(--radius-md);
    margin-top: 0.5rem;
}

.dropdown-item {
    padding: 0.75rem 1.5rem;
    transition: all var(--transition-fast);
}

.dropdown-item:hover {
    background-color: var(--light-color);
    color: var(--primary-color);
}

/* ============================================================================
   CARDS
   ============================================================================ */
.card {
    border: none;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    margin-bottom: var(--spacing-md);
    overflow: hidden;
}

.card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.card-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    font-weight: 600;
    padding: var(--spacing-md);
    border-bottom: none;
}

.card-body {
    padding: var(--spacing-md);
}

.card-footer {
    background-color: var(--light-color);
    border-top: 1px solid #dee2e6;
    padding: var(--spacing-sm) var(--spacing-md);
}

/* Match Cards */
.match-card {
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    overflow: hidden;
}

.match-card:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-8px);
}

.match-card-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.match-card-body {
    padding: var(--spacing-md);
}

.match-teams {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: var(--spacing-md) 0;
    gap: var(--spacing-sm);
}

.team {
    flex: 1;
    text-align: center;
}

.team-name {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--dark-color);
    margin-top: var(--spacing-xs);
}

.team-flag {
    font-size: 3rem;
    line-height: 1;
}

.vs-separator {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--secondary-color);
    padding: 0 var(--spacing-sm);
}

.match-score {
    font-family: var(--font-mono);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.match-info {
    text-align: center;
    color: var(--secondary-color);
    font-size: 0.95rem;
    margin-top: var(--spacing-md);
}

.match-info i {
    margin-right: var(--spacing-xs);
}

/* ============================================================================
   COUNTDOWN TIMERS
   ============================================================================ */
.countdown-container {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    color: white;
    text-align: center;
    margin: var(--spacing-md) 0;
    box-shadow: var(--shadow-md);
}

.countdown-title {
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    opacity: 0.9;
    margin-bottom: var(--spacing-xs);
}

.countdown-display {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.countdown-unit {
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm) var(--spacing-md);
    min-width: 70px;
}

.countdown-value {
    font-size: 2rem;
    font-weight: 700;
    font-family: var(--font-mono);
    display: block;
}

.countdown-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    opacity: 0.8;
    letter-spacing: 0.5px;
}

/* Countdown Warning States */
.countdown-container.warning {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    animation: pulse-warning 2s ease-in-out infinite;
}

.countdown-container.danger {
    background: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
    animation: pulse-danger 1s ease-in-out infinite;
}

@keyframes pulse-warning {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.85; }
}

@keyframes pulse-danger {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

/* ============================================================================
   BADGES AND STATUS INDICATORS
   ============================================================================ */
.badge {
    padding: 0.5rem 1rem;
    border-radius: var(--radius-lg);
    font-weight: 600;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

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

.status-badge i {
    font-size: 0.875rem;
}

.badge-scheduled {
    background-color: var(--info-color);
    color: white;
}

.badge-ongoing {
    background-color: var(--warning-color);
    color: var(--dark-color);
    animation: pulse-live 2s ease-in-out infinite;
}

.badge-completed {
    background-color: var(--success-color);
    color: white;
}

.badge-open {
    background-color: transparent;
    border: 2px solid var(--success-color);
    color: var(--success-color);
}

.badge-closed {
    background-color: transparent;
    border: 2px solid var(--danger-color);
    color: var(--danger-color);
}

@keyframes pulse-live {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.8; transform: scale(1.05); }
}

/* Points Badges */
.points-badge {
    font-family: var(--font-mono);
    font-size: 1.25rem;
    font-weight: 700;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-lg);
    display: inline-block;
}

.points-exact {
    background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    color: white;
}

.points-outcome {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    color: white;
}

.points-draw {
    background: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
    color: var(--dark-color);
}

.points-wrong {
    background-color: #f1f3f5;
    color: var(--secondary-color);
}

/* ============================================================================
   FORMS
   ============================================================================ */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-label {
    font-weight: 600;
    color: var(--dark-color);
    margin-bottom: var(--spacing-xs);
    display: block;
}

.form-control {
    border: 2px solid #e9ecef;
    border-radius: var(--radius-md);
    padding: 0.75rem 1rem;
    font-size: 1rem;
    transition: all var(--transition-fast);
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.15);
    outline: none;
}

.form-control.is-invalid {
    border-color: var(--danger-color);
}

.form-control.is-valid {
    border-color: var(--success-color);
}

.invalid-feedback,
.valid-feedback {
    display: block;
    margin-top: var(--spacing-xs);
    font-size: 0.875rem;
}

/* Prediction Form */
.prediction-form {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-lg);
}

.score-input-group {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    margin: var(--spacing-lg) 0;
}

.score-input-group > div {
    position: relative;
}

.score-input {
    width: 100px;
    text-align: center;
    font-size: 2rem;
    font-weight: 700;
    font-family: var(--font-mono);
    border: 3px solid var(--primary-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
}

.score-input:focus {
    box-shadow: 0 0 0 0.3rem rgba(0, 123, 255, 0.25);
}

/* Override Bootstrap's validation background images for score inputs */
.score-input.is-valid,
.score-input.is-invalid {
    background-image: none !important;
    padding-right: var(--spacing-md) !important;
}

/* Show validation state through border color only */
.score-input.is-valid {
    border-color: var(--success-color);
    background-color: #f0fff4;
}

.score-input.is-invalid {
    border-color: var(--danger-color);
    background-color: #fff5f5;
}

/* Validation indicator styling */
.validation-indicator {
    animation: fadeIn 0.3s ease-in-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-50%) scale(0.5);
    }
    to {
        opacity: 1;
        transform: translateY(-50%) scale(1);
    }
}

/* ============================================================================
   BUTTONS
   ============================================================================ */
.btn {
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    border: none;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-size: 0.875rem;
}

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

.btn:active {
    transform: translateY(0);
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-success {
    background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    color: white;
}

.btn-danger {
    background: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
    color: white;
}

.btn-outline-primary {
    background: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
}

.btn-outline-primary:hover {
    background: var(--primary-color);
    color: white;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1rem;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.75rem;
}

.btn-block {
    display: block;
    width: 100%;
}

/* ============================================================================
   LEADERBOARD
   ============================================================================ */
.leaderboard-podium {
    display: flex;
    justify-content: center;
    align-items: flex-end;
    gap: var(--spacing-md);
    margin: var(--spacing-xl) 0;
    padding: var(--spacing-lg);
}

.podium-place {
    text-align: center;
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    background: white;
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-base);
    min-width: 150px;
}

.podium-place:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.podium-first {
    order: 2;
    background: linear-gradient(135deg, #f6d365 0%, #fda085 100%);
    color: white;
    padding: var(--spacing-xl);
    font-size: 1.1rem;
}

.podium-second {
    order: 1;
    background: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
}

.podium-third {
    order: 3;
    background: linear-gradient(135deg, #ffecd2 0%, #fcb69f 100%);
}

.podium-trophy {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.podium-rank {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.podium-username {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.podium-points {
    font-size: 1.5rem;
    font-weight: 700;
    font-family: var(--font-mono);
}

/* Leaderboard Table */
.leaderboard-table {
    background: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.leaderboard-table table {
    width: 100%;
    margin: 0;
}

.leaderboard-table thead {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.leaderboard-table th {
    padding: var(--spacing-md);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-size: 0.875rem;
}

.leaderboard-table td {
    padding: var(--spacing-md);
    border-bottom: 1px solid #f1f3f5;
}

.leaderboard-table tr:hover {
    background-color: #f8f9fa;
}

.leaderboard-table tr.current-user {
    background: linear-gradient(90deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    font-weight: 600;
}

.rank-number {
    font-size: 1.25rem;
    font-weight: 700;
    font-family: var(--font-mono);
    color: var(--primary-color);
}

.rank-trophy {
    font-size: 1.5rem;
    margin-right: var(--spacing-xs);
}

/* ============================================================================
   HERO SECTION
   ============================================================================ */
.hero-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 4rem 0;
    text-align: center;
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-xl);
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
}

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.95;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

.hero-buttons .btn {
    background: white;
    color: var(--primary-color);
    font-size: 1rem;
    padding: 1rem 2rem;
}

.hero-buttons .btn:hover {
    background: rgba(255, 255, 255, 0.95);
    transform: translateY(-4px);
}

/* ============================================================================
   STATISTICS CARDS
   ============================================================================ */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin: var(--spacing-lg) 0;
}

.stat-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: all var(--transition-base);
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.stat-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--primary-color);
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 700;
    font-family: var(--font-mono);
    color: var(--dark-color);
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--secondary-color);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-progress {
    margin-top: var(--spacing-sm);
}

/* ============================================================================
   ALERTS AND FLASH MESSAGES
   ============================================================================ */
.alert {
    border: none;
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    box-shadow: var(--shadow-sm);
    animation: slideDown var(--transition-base);
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.alert-dismissible .btn-close {
    padding: var(--spacing-md);
}

.alert i {
    font-size: 1.5rem;
}

/* ============================================================================
   FOOTER
   ============================================================================ */
.footer {
    background: var(--dark-color);
    color: white;
    padding: var(--spacing-lg) 0;
    margin-top: auto;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.footer-links {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: white;
}

.footer-social {
    display: flex;
    gap: var(--spacing-md);
}

.footer-social a {
    color: rgba(255, 255, 255, 0.8);
    font-size: 1.5rem;
    transition: all var(--transition-fast);
}

.footer-social a:hover {
    color: white;
    transform: translateY(-4px);
}

/* ============================================================================
   UTILITY CLASSES
   ============================================================================ */
.text-gradient {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }
.mt-5 { margin-top: var(--spacing-xl); }

.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }
.mb-5 { margin-bottom: var(--spacing-xl); }

.p-1 { padding: var(--spacing-xs); }
.p-2 { padding: var(--spacing-sm); }
.p-3 { padding: var(--spacing-md); }
.p-4 { padding: var(--spacing-lg); }
.p-5 { padding: var(--spacing-xl); }

/* ============================================================================
   RESPONSIVE DESIGN
   ============================================================================ */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.25rem;
    }
    
    .match-teams {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .vs-separator {
        transform: rotate(90deg);
    }
    
    .leaderboard-podium {
        flex-direction: column;
        align-items: center;
    }
    
    .podium-place {
        width: 100%;
        max-width: 300px;
    }
    
    .podium-first,
    .podium-second,
    .podium-third {
        order: initial;
    }
    
    .countdown-display {
        gap: var(--spacing-xs);
    }
    
    .countdown-unit {
        min-width: 60px;
        padding: var(--spacing-xs) var(--spacing-sm);
    }
    
    .countdown-value {
        font-size: 1.5rem;
    }
    
    .score-input {
        width: 80px;
        font-size: 1.5rem;
    }
}

@media (max-width: 576px) {
    .main-content {
        padding-top: 70px;
    }
    
    .btn {
        font-size: 0.75rem;
        padding: 0.625rem 1.25rem;
    }
    
    h1 { font-size: 1.75rem; }
    h2 { font-size: 1.5rem; }
    h3 { font-size: 1.25rem; }
    
    .leaderboard-table td,
    .leaderboard-table th {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: 0.875rem;
    }
}

/* ============================================================================
   PRINT STYLES
   ============================================================================ */
@media print {
    .navbar,
    .footer,
    .btn,
    .countdown-container {
        display: none !important;
    }
    
    .main-content {
        padding-top: 0;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid #dee2e6;
    }
}

/* ============================================================================
   ACCESSIBILITY
   ============================================================================ */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

:focus-visible {
    outline: 3px solid var(--primary-color);
    outline-offset: 2px;
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
    .card {
        border: 2px solid var(--dark-color);
    }
    
    .btn {
        border: 2px solid currentColor;
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}