/* ===== CSS Variables ===== */
:root {
    /* Colors */
    --primary-color: #2196F3;
    --primary-dark: #1976D2;
    --primary-light: #BBDEFB;
    --primary-bg: #E3F2FD;
    
    --secondary-color: #4CAF50;
    --secondary-dark: #388E3C;
    --secondary-light: #C8E6C9;
    
    --accent-color: #FF9800;
    --accent-dark: #F57C00;
    --accent-light: #FFE0B2;
    
    --danger-color: #F44336;
    --danger-dark: #D32F2F;
    --danger-light: #FFEBEE;
    
    --warning-color: #FFC107;
    --warning-light: #FFF8E1;
    
    --text-primary: #212121;
    --text-secondary: #757575;
    --text-light: #f5f5f5;
    --text-inverse: #ffffff;
    
    --bg-color: #f5f5f5;
    --bg-light: #ffffff;
    --bg-dark: #e0e0e0;
    
    --card-shadow: 0 2px 4px rgba(0, 0, 0, 0.1), 0 8px 16px rgba(0, 0, 0, 0.1);
    --card-shadow-hover: 0 4px 8px rgba(0, 0, 0, 0.15), 0 12px 24px rgba(0, 0, 0, 0.15);
    
    /* Team Colors */
    --team-blue: #2196F3;
    --team-blue-light: #BBDEFB;
    --team-blue-dark: #1976D2;
    --team-white: #f5f5f5;
    --team-white-dark: #e0e0e0;
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 50%;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s ease;
    --transition-slow: 0.35s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
}

h1 { font-size: 1.8rem; }
h2 { font-size: 1.4rem; }
h3 { font-size: 1.2rem; }

p {
    margin-bottom: var(--spacing-md);
}

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

a:hover {
    color: var(--primary-dark);
}

/* ===== Layout ===== */
#app {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* ===== Header ===== */
.header {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: var(--text-inverse);
    padding: var(--spacing-lg);
    box-shadow: var(--card-shadow);
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xs);
}

.logo i {
    font-size: 1.8rem;
}

.logo h1 {
    font-size: 1.6rem;
    letter-spacing: -0.5px;
}

.subtitle {
    font-size: 0.9rem;
    opacity: 0.9;
}

/* ===== Navigation ===== */
.nav-menu {
    background: var(--bg-light);
    border-bottom: 1px solid var(--bg-dark);
    padding: var(--spacing-sm) var(--spacing-md);
    display: flex;
    gap: var(--spacing-xs);
    overflow-x: auto;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.menu-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    border-radius: var(--radius-md);
    white-space: nowrap;
}

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

.menu-btn.active {
    background: var(--primary-bg);
    color: var(--primary-color);
}

.menu-btn i {
    font-size: 1.1rem;
}

.menu-btn span {
    font-size: 0.75rem;
    font-weight: 500;
}

/* ===== Main Content ===== */
.main-content {
    flex: 1;
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-md);
    width: 100%;
}

/* ===== Screens ===== */
.screen-container {
    flex: 1;
}

.screen {
    display: none;
    animation: fadeIn var(--transition-normal);
}

.screen.active {
    display: block;
}

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

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

.screen-header h2 {
    flex: 1;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.back-btn {
    background: var(--bg-light);
    border: 1px solid var(--bg-dark);
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.back-btn:hover {
    background: var(--bg-dark);
}

.screen-content {
    padding-bottom: var(--spacing-xl);
}

/* ===== Cards ===== */
.card {
    background: var(--bg-light);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--card-shadow);
    transition: box-shadow var(--transition-fast);
}

.card:hover {
    box-shadow: var(--card-shadow-hover);
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

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

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

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

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

.btn-danger {
    background: var(--danger-color);
    color: var(--text-inverse);
}

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

.btn-small {
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: 0.85rem;
}

.btn-icon {
    padding: var(--spacing-sm);
    background: transparent;
    border: none;
    cursor: pointer;
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

.btn-icon:hover {
    color: var(--text-primary);
}

.action-buttons {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

/* ===== Forms ===== */
.form-card {
    margin-bottom: var(--spacing-lg);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
    font-size: 0.9rem;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--bg-dark);
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-group input[type="number"] {
    -moz-appearance: textfield;
}

.form-group input[type="number"]::-webkit-outer-spin-button,
.form-group input[type="number"]::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.form-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: flex-end;
    margin-top: var(--spacing-lg);
}

.error-message {
    display: block;
    color: var(--danger-color);
    font-size: 0.8rem;
    margin-top: var(--spacing-xs);
}

.input-group {
    display: flex;
    gap: var(--spacing-sm);
}

.input-group input {
    flex: 1;
}

/* ===== Stats ===== */
.welcome-card {
    margin-bottom: var(--spacing-lg);
}

.welcome-card h3 {
    margin-bottom: var(--spacing-sm);
}

.stats-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

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

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

.stat-icon.blue {
    background: var(--primary-bg);
    color: var(--primary-color);
}

.stat-icon.green {
    background: var(--secondary-light);
    color: var(--secondary-color);
}

.stat-icon.orange {
    background: var(--accent-light);
    color: var(--accent-color);
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    display: block;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* ===== Quick Actions ===== */
.quick-actions {
    margin-bottom: var(--spacing-lg);
}

.quick-actions h3 {
    margin-bottom: var(--spacing-md);
}

/* ===== Tables ===== */
.table-container {
    overflow-x: auto;
}

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

.players-table th,
.players-table td {
    padding: var(--spacing-sm) var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid var(--bg-dark);
}

.players-table th {
    background: var(--bg-dark);
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.players-table tr:hover {
    background: var(--bg-dark);
}

.players-table .empty-row td {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--text-secondary);
}

/* ===== Team Display ===== */
.teams-container {
    display: grid;
    gap: var(--spacing-lg);
}

.team-card {
    background: var(--bg-light);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--card-shadow);
    border-left: 4px solid;
}

.team-card.blue {
    border-left-color: var(--team-blue);
}

.team-card.white {
    border-left-color: var(--text-secondary);
}

.team-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.team-name {
    font-size: 1.3rem;
    font-weight: 700;
}

.team-name.blue {
    color: var(--team-blue);
}

.team-name.white {
    color: var(--text-primary);
}

.team-stats {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.team-players {
    list-style: none;
}

.team-players li {
    padding: var(--spacing-xs) 0;
    border-bottom: 1px solid var(--bg-dark);
}

.team-players li:last-child {
    border-bottom: none;
}

.team-players li strong {
    font-weight: 600;
}

.player-tag {
    display: inline-block;
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    margin-left: var(--spacing-xs);
}

.player-tag.leader {
    background: gold;
    color: #000;
}

.player-tag.joker {
    background: var(--accent-color);
    color: #fff;
}

.player-tag.not-attending {
    background: var(--bg-dark);
    color: var(--text-secondary);
}

/* ===== Attendance ===== */
.attendance-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.attendance-counter {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--primary-color);
}

.attendance-lists {
    display: grid;
    gap: var(--spacing-lg);
}

.attending-list,
.not-attending-list {
    max-height: 300px;
    overflow-y: auto;
}

.player-list {
    display: grid;
    gap: var(--spacing-xs);
}

.player-list-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-xs) 0;
    border-bottom: 1px solid var(--bg-dark);
}

.player-list-item:last-child {
    border-bottom: none;
}

.player-attendance-btn {
    padding: var(--spacing-xs) var(--spacing-sm);
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.8rem;
    transition: all var(--transition-fast);
}

.player-attendance-btn.attending {
    background: var(--secondary-light);
    color: var(--secondary-color);
}

.player-attendance-btn.not-attending {
    background: var(--bg-dark);
    color: var(--text-secondary);
}

/* ===== Team Selection ===== */
.team-select {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.team-select-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--bg-dark);
    border-radius: var(--radius-md);
    background: var(--bg-light);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.team-select-btn:hover {
    border-color: var(--primary-color);
}

.team-select-btn.selected {
    border-color: var(--primary-color);
    background: var(--primary-bg);
}

.team-select-btn.winner {
    border-color: var(--secondary-color);
    background: var(--secondary-light);
}

.team-select-btn.loser {
    border-color: var(--danger-color);
    background: var(--danger-light);
}

.score-inputs {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin: var(--spacing-md) 0;
}

.score-inputs .form-group {
    flex: 1;
    margin-bottom: 0;
}

.score-separator {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-secondary);
}

/* ===== Strategy Selection ===== */
.strategy-select {
    display: grid;
    gap: var(--spacing-sm);
    margin: var(--spacing-lg) 0;
}

.strategy-option {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border: 2px solid var(--bg-dark);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.strategy-option:hover {
    border-color: var(--primary-light);
}

.strategy-option input {
    display: none;
}

.strategy-option input:checked + .strategy-name {
    color: var(--primary-color);
}

.strategy-name {
    font-weight: 600;
    flex: 1;
}

.strategy-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* ===== Settings ===== */
.settings-group {
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
    background: var(--bg-dark);
    border-radius: var(--radius-md);
}

.settings-group label {
    display: block;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.settings-group .hint {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: var(--spacing-xs);
}

.settings-group .hint.warning {
    color: var(--warning-color);
}

.settings-group .btn {
    margin-top: var(--spacing-sm);
}

.settings-group .input-group {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

.settings-group .input-group input {
    flex: 1;
    max-width: 200px;
}

/* ===== Match History ===== */
.match-history-list {
    display: grid;
    gap: var(--spacing-sm);
}

.match-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    background: var(--bg-dark);
    border-radius: var(--radius-md);
    transition: background var(--transition-fast);
}

.match-item:hover {
    background: var(--bg-color);
}

.match-teams {
    font-size: 1.1rem;
    font-weight: 600;
}

.match-score {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--primary-color);
}

.match-date {
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-align: right;
}

/* ===== Empty States ===== */
.empty-state {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--text-secondary);
}

.empty-state i {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
    opacity: 0.5;
}

/* ===== Toast ===== */
.toast {
    position: fixed;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--text-primary);
    color: var(--text-inverse);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    z-index: 1000;
    opacity: 0;
    transition: all var(--transition-normal);
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

.toast.success {
    background: var(--secondary-color);
}

.toast.error {
    background: var(--danger-color);
}

.toast.warning {
    background: var(--warning-color);
}

/* ===== Modal ===== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1001;
}

.modal.show {
    display: flex;
}

.modal-content {
    max-width: 400px;
    width: 90%;
}

.modal-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: flex-end;
    margin-top: var(--spacing-lg);
}

/* ===== Footer ===== */
.footer {
    background: var(--bg-light);
    border-top: 1px solid var(--bg-dark);
    padding: var(--spacing-md);
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* ===== Responsive Design ===== */
@media (min-width: 768px) {
    .header {
        padding: var(--spacing-xl);
    }
    
    .header-content {
        max-width: 100%;
    }
    
    .main-content {
        padding: var(--spacing-xl);
    }
    
    .nav-menu {
        justify-content: center;
    }
    
    .screen-header {
        padding-bottom: var(--spacing-lg);
    }
    
    .stats-row {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .form-actions {
        justify-content: flex-start;
    }
    
    .modal-content {
        width: auto;
    }
}

@media (max-width: 600px) {
    .header {
        padding: var(--spacing-md);
    }
    
    .logo h1 {
        font-size: 1.4rem;
    }
    
    .nav-menu {
        justify-content: flex-start;
    }
    
    .menu-btn span {
        display: none;
    }
    
    .menu-btn {
        padding: var(--spacing-sm);
    }
    
    .stats-row {
        grid-template-columns: 1fr;
    }
    
    .stat-card {
        flex-direction: column;
        text-align: center;
    }
    
    .team-select {
        flex-direction: column;
    }
    
    .score-inputs {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .score-separator {
        display: none;
    }
    
    .form-actions {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
    
    .action-buttons {
        flex-direction: column;
    }
    
    .attendance-header {
        flex-direction: column;
        align-items: stretch;
    }
    
    .attendance-counter {
        text-align: center;
    }
    
    .settings-group .input-group {
        flex-direction: column;
    }
    
    .modal-content {
        width: calc(100% - var(--spacing-lg) * 2);
        margin: var(--spacing-lg);
    }
}

/* ===== Animations ===== */
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.loading {
    animation: pulse 1s infinite;
}

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

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

::-webkit-scrollbar-thumb {
    background: var(--bg-color);
    border-radius: var(--radius-full);
}

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

/* ===== Print Styles ===== */
@media print {
    .header,
    .nav-menu,
    .footer,
    .menu-btn,
    .btn {
        display: none !important;
    }
    
    .screen {
        display: block !important;
        page-break-inside: avoid;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid #ddd;
    }
}