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

:root {
    /* Modern Color Palette - Light Mode */
    --primary-color: #667eea;
    --primary-dark: #5568d3;
    --primary-light: #818cf8;
    --secondary-color: #764ba2;
    --accent-color: #f093fb;
    --success-color: #10b981;
    --success-color-dark: #059669;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --info-color: #3b82f6;
    
    /* Backgrounds */
    --background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --background-light: #f8fafc;
    --card-bg: #ffffff;
    --card-bg-alt: #f9fafb;
    
    /* Text */
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    
    /* Borders & Shadows */
    --border-color: #e2e8f0;
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --border-radius-lg: 16px;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark Mode */
[data-theme="dark"] {
    --primary-color: #818cf8;
    --primary-dark: #6366f1;
    --primary-light: #a5b4fc;
    --secondary-color: #c084fc;
    --accent-color: #f0abfc;
    
    --background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
    --background-light: #0f172a;
    --card-bg: #1e293b;
    --card-bg-alt: #334155;
    
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    
    --border-color: #334155;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.3), 0 1px 2px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -2px rgba(0, 0, 0, 0.2);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.3), 0 10px 10px -5px rgba(0, 0, 0, 0.2);
}

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

.app-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg) var(--spacing-2xl);
}

header {
    text-align: center;
    padding: var(--spacing-2xl) 0 var(--spacing-xl);
    background: var(--background);
    color: white;
    margin: 0 calc(-1 * var(--spacing-lg)) var(--spacing-xl);
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}

/* Decorative header elements */
header::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 300px;
    height: 300px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    animation: float 6s ease-in-out infinite;
}

header::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -5%;
    width: 200px;
    height: 200px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    animation: float 8s ease-in-out infinite reverse;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(20px); }
}

header h1 {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
    font-weight: 800;
    position: relative;
    z-index: 1;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    animation: fadeInDown 0.8s ease-out;
}

.subtitle {
    font-size: 1.125rem;
    opacity: 0.95;
    position: relative;
    z-index: 1;
    font-weight: 500;
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

/* Dark mode toggle */
.theme-toggle {
    position: fixed;
    top: var(--spacing-md);
    right: var(--spacing-md);
    z-index: 1000;
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-sm) var(--spacing-md);
    cursor: pointer;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 500;
    color: var(--text-primary);
}

.theme-toggle:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.theme-toggle:active {
    transform: translateY(0);
}

/* Tabs Navigation */
.tab-nav {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    background: var(--card-bg);
    padding: var(--spacing-sm);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    animation: fadeIn 0.5s ease-out;
}

.tab-btn {
    flex: 1;
    padding: var(--spacing-md) var(--spacing-lg);
    background: transparent;
    border: none;
    border-radius: var(--border-radius-sm);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    color: var(--text-secondary);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
}

.tab-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--border-radius-sm);
    background: var(--primary-color);
    opacity: 0;
    transition: var(--transition);
}

.tab-btn:hover {
    background: var(--background-light);
    transform: translateY(-2px);
}

.tab-btn.active {
    color: white;
}

.tab-btn.active::before {
    opacity: 1;
}

.tab-btn span {
    position: relative;
    z-index: 1;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.4s ease-out;
}

/* Cards */
.card {
    background: var(--card-bg);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    margin-bottom: var(--spacing-xl);
    border: 1px solid var(--border-color);
    transition: var(--transition);
    animation: fadeInUp 0.5s ease-out;
}

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

.card h2 {
    font-size: 1.75rem;
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.card h2::before {
    content: '';
    width: 4px;
    height: 28px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 2px;
}

/* Buttons */
.btn {
    padding: var(--spacing-md) var(--spacing-xl);
    border: none;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:active::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    box-shadow: var(--shadow-md);
}

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

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

.btn-secondary {
    background: var(--secondary-color);
    color: white;
    margin-top: var(--spacing-md);
    box-shadow: var(--shadow-md);
}

.btn-secondary:hover {
    background: #6938a1;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-danger {
    background: var(--danger-color);
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.875rem;
    box-shadow: var(--shadow);
}

.btn-danger:hover {
    background: #dc2626;
    transform: scale(1.05);
}

.btn-success {
    background: var(--success-color);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-success:hover {
    background: var(--success-color-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* Input Groups */
.player-input-group {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

input[type="text"],
input[type="number"],
select {
    flex: 1;
    padding: var(--spacing-md);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
    min-width: 200px;
    background: var(--card-bg);
    color: var(--text-primary);
    font-family: inherit;
}

input:focus,
select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
    transform: translateY(-1px);
}

input::placeholder {
    color: var(--text-muted);
}

/* Players List */
.players-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.player-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg);
    background: var(--card-bg-alt);
    border-radius: var(--border-radius);
    border-left: 4px solid var(--primary-color);
    box-shadow: var(--shadow);
    transition: var(--transition);
    animation: slideInLeft 0.4s ease-out;
}

.player-item:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-md);
}

.player-info {
    flex: 1;
}

.player-name {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.player-score {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.player-actions {
    display: flex;
    gap: var(--spacing-sm);
}

/* Score Form */
.score-form {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.player-select {
    flex: 2;
    min-width: 150px;
}

#scoreInput {
    flex: 1;
    min-width: 100px;
}

/* Scoreboard */
.scoreboard {
    overflow-x: auto;
}

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

.scoreboard-table th,
.scoreboard-table td {
    padding: var(--spacing-lg);
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.scoreboard-table th {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    font-weight: 700;
    text-transform: uppercase;
    font-size: 0.875rem;
    letter-spacing: 0.5px;
}

.scoreboard-table tr {
    transition: var(--transition);
}

.scoreboard-table tr:hover {
    background: var(--card-bg-alt);
    transform: scale(1.01);
}

.rank {
    font-size: 1.5rem;
    font-weight: 900;
}

.rank-1 {
    color: #fbbf24;
    text-shadow: 0 2px 4px rgba(251, 191, 36, 0.3);
}

.rank-2 {
    color: #9ca3af;
    text-shadow: 0 2px 4px rgba(156, 163, 175, 0.3);
}

.rank-3 {
    color: #d97706;
    text-shadow: 0 2px 4px rgba(217, 119, 6, 0.3);
}

/* Round History */
.round-history {
    max-height: 500px;
    overflow-y: auto;
    padding-right: var(--spacing-xs);
}

.round-history::-webkit-scrollbar {
    width: 8px;
}

.round-history::-webkit-scrollbar-track {
    background: var(--background-light);
    border-radius: 4px;
}

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

.round-item {
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
    background: var(--card-bg-alt);
    border-radius: var(--border-radius);
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
    animation: slideInRight 0.4s ease-out;
}

.round-item:hover {
    transform: translateX(-4px);
    box-shadow: var(--shadow-md);
}

.round-info {
    flex: 1;
}

.round-player {
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.round-time {
    font-size: 0.8125rem;
    color: var(--text-muted);
}

.round-points {
    font-size: 1.5rem;
    font-weight: 900;
    color: var(--success-color);
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(16, 185, 129, 0.1);
    border-radius: var(--border-radius-sm);
}

.round-points.negative {
    color: var(--danger-color);
    background: rgba(239, 68, 68, 0.1);
}

/* Calculator */
.calculator {
    max-width: 400px;
    margin: 0 auto;
}

.calc-display {
    margin-bottom: var(--spacing-lg);
}

.calc-display input {
    width: 100%;
    padding: var(--spacing-xl);
    font-size: 2.5rem;
    text-align: right;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    background: var(--card-bg-alt);
    color: var(--text-primary);
    font-weight: 700;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
}

.calc-display input:focus {
    border-color: var(--primary-color);
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.05), 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.calc-buttons {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.calc-btn {
    padding: var(--spacing-xl);
    font-size: 1.5rem;
    font-weight: 700;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    background: var(--card-bg-alt);
    color: var(--text-primary);
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
}

.calc-btn::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    transform: translate(-50%, -50%);
    transition: width 0.5s, height 0.5s;
}

.calc-btn:active::after {
    width: 200px;
    height: 200px;
}

.calc-btn:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: var(--shadow-lg);
}

.calc-btn:active {
    transform: translateY(-1px) scale(0.98);
}

.calc-operator {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
}

.calc-operator:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-color));
}

.calc-equals {
    background: linear-gradient(135deg, var(--success-color), var(--success-color-dark));
    color: white;
}

.calc-equals:hover {
    background: linear-gradient(135deg, var(--success-color-dark), var(--success-color));
}

.calc-clear {
    background: linear-gradient(135deg, var(--danger-color), #dc2626);
    color: white;
}

.calc-clear:hover {
    background: linear-gradient(135deg, #dc2626, var(--danger-color));
}

.calc-actions {
    display: flex;
    justify-content: center;
}

#useCalcResult {
    width: 100%;
}

/* Empty Messages */
.empty-message {
    text-align: center;
    color: var(--text-muted);
    padding: var(--spacing-2xl);
    font-style: italic;
    font-size: 1.125rem;
}

/* Footer */
footer {
    text-align: center;
    padding: var(--spacing-2xl) 0;
    color: var(--text-secondary);
    font-size: 0.9375rem;
    margin-top: var(--spacing-2xl);
}

/* Responsive Design */
@media (max-width: 600px) {
    header h1 {
        font-size: 2.25rem;
    }

    .player-input-group,
    .score-form {
        flex-direction: column;
    }

    input[type="text"],
    input[type="number"],
    select {
        min-width: 100%;
    }

    .tab-btn {
        font-size: 0.875rem;
        padding: var(--spacing-sm) var(--spacing-md);
    }

    .calc-btn {
        padding: var(--spacing-lg);
        font-size: 1.125rem;
    }

    .player-item {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }

    .player-actions {
        width: 100%;
        justify-content: flex-end;
    }
    
    .theme-toggle {
        font-size: 0.875rem;
        padding: var(--spacing-xs) var(--spacing-sm);
    }
    
    .card {
        padding: var(--spacing-lg);
    }
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

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

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

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

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

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-10px); }
    75% { transform: translateX(10px); }
}

/* Success Animation */
@keyframes successPulse {
    0% {
        box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
    }
    70% {
        box-shadow: 0 0 0 20px rgba(16, 185, 129, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(16, 185, 129, 0);
    }
}

.player-item,
.round-item {
    animation: slideInLeft 0.4s ease-out;
}

.success-feedback {
    animation: successPulse 0.6s ease-out;
}

/* Confetti Animation */
.confetti {
    position: fixed;
    width: 10px;
    height: 10px;
    background: var(--primary-color);
    pointer-events: none;
    z-index: 9999;
    animation: confettiFall 3s ease-out forwards;
}

@keyframes confettiFall {
    0% {
        transform: translateY(0) rotate(0deg);
        opacity: 1;
    }
    100% {
        transform: translateY(100vh) rotate(720deg);
        opacity: 0;
    }
}

.confetti:nth-child(2n) {
    background: var(--secondary-color);
}

.confetti:nth-child(3n) {
    background: var(--accent-color);
}

.confetti:nth-child(4n) {
    background: var(--success-color);
}

/* Notification Toast */
.notification-toast {
    position: fixed;
    top: 80px;
    right: var(--spacing-lg);
    background: var(--card-bg);
    color: var(--text-primary);
    padding: var(--spacing-lg) var(--spacing-xl);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-xl);
    z-index: 9999;
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    min-width: 300px;
    border-left: 4px solid var(--primary-color);
    animation: slideInRight 0.3s ease-out;
    transition: var(--transition);
}

.notification-toast.success {
    border-left-color: var(--success-color);
}

.notification-toast.error {
    border-left-color: var(--danger-color);
}

.notification-toast.warning {
    border-left-color: var(--warning-color);
}

.notification-toast.info {
    border-left-color: var(--info-color);
}

.notification-toast .icon {
    font-size: 1.5rem;
}

.notification-toast .message {
    flex: 1;
    font-weight: 600;
}

.notification-toast.hiding {
    animation: slideOutRight 0.3s ease-out forwards;
}

@keyframes slideOutRight {
    from {
        opacity: 1;
        transform: translateX(0);
    }
    to {
        opacity: 0;
        transform: translateX(100%);
    }
}

/* Install Prompt */
.install-prompt {
    position: fixed;
    bottom: 1rem;
    left: 1rem;
    right: 1rem;
    background: var(--card-bg);
    padding: 1rem;
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
    display: none;
    align-items: center;
    gap: 1rem;
    z-index: 1000;
}

.install-prompt.show {
    display: flex;
}

.install-prompt button {
    white-space: nowrap;
}

/* Score Wizard */
.wizard-container {
    text-align: center;
}

.wizard-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.wizard-player-info {
    text-align: center;
    padding: var(--spacing-xl);
    background: var(--card-bg-alt);
    border-radius: var(--border-radius-lg);
    border: 3px solid var(--primary-color);
    box-shadow: var(--shadow-lg);
    animation: scaleIn 0.4s ease-out;
}

.wizard-progress {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.wizard-player-name {
    font-size: 2.5rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-sm);
}

.wizard-player-score {
    font-size: 1.125rem;
    color: var(--text-secondary);
    font-weight: 600;
}

.wizard-player-score span {
    font-weight: 900;
    color: var(--text-primary);
    font-size: 1.75rem;
    margin-left: var(--spacing-xs);
}

.wizard-calculator {
    max-width: 400px;
    margin: 0 auto;
    width: 100%;
}

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

.wizard-actions button {
    flex: 1;
    min-width: 140px;
}

@media (max-width: 600px) {
    .wizard-player-name {
        font-size: 1.75rem;
    }

    .wizard-actions button {
        min-width: 100px;
        font-size: 0.875rem;
        padding: var(--spacing-sm) var(--spacing-md);
    }
}