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

:root {
    --primary-color: #6366f1;
    --secondary-color: #ec4899;
    --accent-color: #f59e0b;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --dark-bg: #1f2937;
    --light-bg: #f9fafb;
    --border-color: #e5e7eb;
    --text-dark: #111827;
    --text-light: #6b7280;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--text-dark);
    min-height: 100vh;
    padding-bottom: 40px;
}

/* Navigation Bar */
.navbar {
    background: white;
    padding: 1rem 0;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    color: var(--primary-color);
    font-weight: bold;
    margin: 0;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    flex-wrap: wrap;
}

.nav-link {
    text-decoration: none;
    color: var(--text-light);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    padding: 0.5rem 1rem;
    border-radius: 4px;
}

.nav-link:hover {
    color: var(--primary-color);
    background: var(--light-bg);
}

.nav-link.active {
    color: var(--primary-color);
    border-bottom: 3px solid var(--primary-color);
}

/* Main Container */
.container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 20px;
}

/* Page Sections */
.page {
    background: white;
    border-radius: 12px;
    padding: 2rem;
    box-shadow: var(--shadow);
    display: none;
    animation: fadeIn 0.3s ease;
}

.page.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.page h2 {
    color: var(--text-dark);
    margin-bottom: 1.5rem;
    font-size: 2rem;
    border-bottom: 3px solid var(--primary-color);
    padding-bottom: 0.5rem;
    display: inline-block;
}

.page h3 {
    color: var(--text-dark);
    margin-top: 2rem;
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.page h4 {
    color: var(--text-light);
    margin-top: 1.5rem;
    margin-bottom: 1rem;
}

/* Dashboard */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.stat-card {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: transform 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-5px);
}

.stat-card h3 {
    color: white;
    font-size: 1rem;
    margin: 0;
    opacity: 0.9;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: bold;
    margin: 0.5rem 0 0 0;
}

.action-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-top: 1.5rem;
}

/* Forms */
.form-section {
    background: var(--light-bg);
    padding: 2rem;
    border-radius: 8px;
    margin: 1.5rem 0;
}

.form {
    display: flex;
    flex-direction: column;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-dark);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: 6px;
    font-size: 1rem;
    font-family: inherit;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.member-input {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 1rem;
    padding: 1rem;
    background: white;
    border-radius: 6px;
    border: 1px solid var(--border-color);
}

.member-input input {
    margin: 0;
}

/* Buttons */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-block;
    text-align: center;
    text-decoration: none;
}

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

.btn-primary:hover {
    background: #4f46e5;
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(99, 102, 241, 0.3);
}

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

.btn-secondary:hover {
    background: #d97706;
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(245, 158, 11, 0.3);
}

.btn-warning {
    background: var(--danger-color);
    color: white;
}

.btn-warning:hover {
    background: #dc2626;
}

.btn-small {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

/* Lists */
.events-list,
.teams-list,
.scores-list,
.admin-list {
    display: grid;
    gap: 1rem;
}

.event-card,
.team-card,
.score-card {
    background: white;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    transition: all 0.3s ease;
}

.event-card:hover,
.team-card:hover,
.score-card:hover {
    box-shadow: var(--shadow);
    border-color: var(--primary-color);
}

.event-card h4,
.team-card h4 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.event-info,
.team-info,
.score-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
    margin: 1rem 0;
}

.info-item {
    background: var(--light-bg);
    padding: 0.75rem;
    border-radius: 4px;
}

.info-label {
    color: var(--text-light);
    font-size: 0.875rem;
    font-weight: 600;
}

.info-value {
    color: var(--text-dark);
    font-weight: bold;
    margin-top: 0.25rem;
}

.card-buttons {
    display: flex;
    gap: 0.5rem;
    margin-top: 1rem;
    flex-wrap: wrap;
}

/* Leaderboard */
.leaderboard {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0;
}

.leaderboard th {
    background: var(--primary-color);
    color: white;
    padding: 1rem;
    text-align: left;
    font-weight: 600;
}

.leaderboard td {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.leaderboard tr:hover {
    background: var(--light-bg);
}

.leaderboard .rank {
    font-weight: bold;
    color: var(--primary-color);
}

.leaderboard .medal {
    font-size: 1.5rem;
}

/* Admin Panel */
.admin-section {
    background: var(--light-bg);
    padding: 1.5rem;
    border-radius: 8px;
    margin: 1.5rem 0;
}

.admin-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 1rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.stat-item {
    background: white;
    padding: 1.5rem;
    border-radius: 8px;
    border-left: 4px solid var(--primary-color);
}

.stat-item h4 {
    margin: 0 0 0.5rem 0;
    color: var(--text-light);
}

.stat-item .value {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
}

.modal.show {
    display: block;
}

.modal-content {
    background: white;
    margin: 50px auto;
    padding: 2rem;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    width: 90%;
    max-width: 600px;
    box-shadow: var(--shadow);
}

.close {
    color: var(--text-light);
    float: right;
    font-size: 1.5rem;
    font-weight: bold;
    cursor: pointer;
}

.close:hover {
    color: var(--text-dark);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        gap: 1rem;
    }

    .nav-menu {
        gap: 0.5rem;
        justify-content: center;
    }

    .nav-link {
        padding: 0.25rem 0.5rem;
    }

    .page {
        padding: 1.5rem;
    }

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

    .member-input {
        grid-template-columns: 1fr;
    }

    .action-buttons {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }

    .leaderboard {
        font-size: 0.875rem;
    }

    .leaderboard th,
    .leaderboard td {
        padding: 0.75rem;
    }

    .event-info {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .logo {
        font-size: 1.2rem;
    }

    .page h2 {
        font-size: 1.5rem;
    }

    .stat-card {
        padding: 1rem;
    }

    .stat-number {
        font-size: 2rem;
    }

    .modal-content {
        width: 95%;
        margin: 20px auto;
        padding: 1rem;
    }
}

/* Utility Classes */
.empty-state {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-light);
}

.empty-state h3 {
    color: var(--text-light);
    margin-bottom: 1rem;
}

.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
}

.badge-success {
    background: #d1fae5;
    color: #065f46;
}

.badge-warning {
    background: #fef3c7;
    color: #92400e;
}

.badge-danger {
    background: #fee2e2;
    color: #991b1b;
}

.badge-info {
    background: #dbeafe;
    color: #0c2d6b;
}

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

.margin-top {
    margin-top: 2rem;
}

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