/* ============================================
   RESET & BASE STYLES
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #3B82F6;
    --success-color: #10B981;
    --danger-color: #EF4444;
    --warning-color: #F59E0B;
    --info-color: #8B5CF6;
    --bg-color: #F3F4F6;
    --card-bg: #FFFFFF;
    --text-primary: #1F2937;
    --text-secondary: #6B7280;
    --border-color: #E5E7EB;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.15);
    
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

/* ============================================
   CONTAINER
   ============================================ */
.container {
    max-width: 800px;
    margin: 0 auto;
    animation: fadeIn 0.6s ease;
}

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

/* ============================================
   HEADER
   ============================================ */
header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
    color: white;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-xs);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
}

.subtitle {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* ============================================
   GAME CARD
   ============================================ */
.game-card {
    background: var(--card-bg);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
}

/* ============================================
   INFO BAR
   ============================================ */
.info-bar {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
    background: var(--bg-color);
    border-radius: var(--radius-lg);
}

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

.info-item .label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.info-item .value {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

.info-item .value.highlight {
    color: var(--primary-color);
    font-size: 1.5rem;
}

.info-item .value.score {
    color: var(--success-color);
}

/* ============================================
   MYSTERY BOX
   ============================================ */
.mystery-box {
    text-align: center;
    padding: var(--spacing-xl) 0;
    margin-bottom: var(--spacing-lg);
}

.mystery-number {
    width: 150px;
    height: 150px;
    margin: 0 auto var(--spacing-md);
    background: linear-gradient(135deg, var(--primary-color), var(--info-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 5rem;
    font-weight: 700;
    color: white;
    box-shadow: var(--shadow-lg);
    animation: pulse 2s ease-in-out infinite;
}

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

.mystery-number.revealed {
    animation: none;
    background: var(--success-color);
}

.mystery-text {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* ============================================
   GAME INPUT
   ============================================ */
.game-section {
    margin-bottom: var(--spacing-lg);
}

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

#guess-input {
    flex: 1;
    padding: var(--spacing-md);
    font-size: 1.5rem;
    text-align: center;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-weight: 700;
    transition: var(--transition);
}

#guess-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.hint-text {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
}

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

.btn-primary:hover {
    background: #2563EB;
    transform: translateY(-2px);
}

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

.btn-success:hover {
    background: #059669;
    transform: translateY(-2px);
}

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

.btn-secondary:hover {
    background: #4B5563;
}

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

.btn-info:hover {
    background: #7C3AED;
}

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

.btn-warning:hover {
    background: #D97706;
}

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

.btn-danger:hover {
    background: #DC2626;
}

/* ============================================
   FEEDBACK
   ============================================ */
.feedback {
    min-height: 60px;
    margin: var(--spacing-lg) 0;
    text-align: center;
}

.feedback-message {
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    font-size: 1.1rem;
    font-weight: 600;
    animation: slideIn 0.3s ease;
}

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

.feedback-message.too-high {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger-color);
    border-left: 4px solid var(--danger-color);
}

.feedback-message.too-low {
    background: rgba(59, 130, 246, 0.1);
    color: var(--primary-color);
    border-left: 4px solid var(--primary-color);
}

.feedback-message.correct {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
    border-left: 4px solid var(--success-color);
}

.feedback-message.error {
    background: rgba(245, 158, 11, 0.1);
    color: var(--warning-color);
    border-left: 4px solid var(--warning-color);
}

/* ============================================
   GUESSES LIST
   ============================================ */
.guesses-section {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 2px solid var(--border-color);
}

.guesses-section h3 {
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.guesses-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.guess-item {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    font-weight: 700;
    font-size: 1.1rem;
    transition: var(--transition);
    animation: popIn 0.3s ease;
}

@keyframes popIn {
    0% {
        transform: scale(0);
    }
    50% {
        transform: scale(1.1);
    }
    100% {
        transform: scale(1);
    }
}

.guess-item.high {
    background: rgba(239, 68, 68, 0.2);
    color: var(--danger-color);
}

.guess-item.low {
    background: rgba(59, 130, 246, 0.2);
    color: var(--primary-color);
}

.empty-state {
    text-align: center;
    color: var(--text-secondary);
    font-style: italic;
    padding: var(--spacing-md);
    width: 100%;
}

/* ============================================
   GAME OVER
   ============================================ */
.game-over {
    text-align: center;
    padding: var(--spacing-xl);
}

.result-animation {
    font-size: 5rem;
    margin-bottom: var(--spacing-md);
    animation: bounce 1s ease;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-30px);
    }
    60% {
        transform: translateY(-15px);
    }
}

.result-animation.win i {
    color: var(--success-color);
}

.result-animation.lose i {
    color: var(--danger-color);
}

#result-title {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

#result-message {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.revealed-number {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--spacing-lg);
}

.revealed-number span {
    font-size: 2.5rem;
}

/* ============================================
   ACTION BUTTONS
   ============================================ */
.action-buttons {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    margin-top: var(--spacing-lg);
    flex-wrap: wrap;
}

/* ============================================
   MODAL
   ============================================ */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: var(--spacing-md);
}

.modal-content {
    background: var(--card-bg);
    border-radius: var(--radius-xl);
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    animation: modalSlide 0.3s ease;
}

@keyframes modalSlide {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    padding: var(--spacing-lg);
    border-bottom: 2px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h2 {
    color: var(--text-primary);
}

.close-btn {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-secondary);
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: var(--transition);
}

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

.modal-body {
    padding: var(--spacing-lg);
}

.modal-footer {
    padding: var(--spacing-lg);
    border-top: 2px solid var(--border-color);
    display: flex;
    gap: var(--spacing-sm);
    justify-content: flex-end;
}

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

.setting-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
    color: var(--text-primary);
}

.select-input {
    width: 100%;
    padding: var(--spacing-sm);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    transition: var(--transition);
}

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

input[type="checkbox"] {
    width: 18px;
    height: 18px;
    margin-right: var(--spacing-xs);
    cursor: pointer;
}

/* ============================================
   STATISTICS
   ============================================ */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.stat-card {
    background: var(--bg-color);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    text-align: center;
}

.stat-card i {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

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

.recent-games {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 2px solid var(--border-color);
}

.recent-games h3 {
    margin-bottom: var(--spacing-md);
}

/* ============================================
   TOAST
   ============================================ */
.toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: var(--text-primary);
    color: white;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    transform: translateY(150%);
    transition: transform 0.3s ease;
    z-index: 2000;
}

.toast.show {
    transform: translateY(0);
}

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

/* ============================================
   FOOTER
   ============================================ */
footer {
    text-align: center;
    margin-top: var(--spacing-xl);
    color: white;
    font-size: 0.9rem;
}

footer a {
    color: white;
    text-decoration: none;
    font-weight: 600;
    border-bottom: 2px solid white;
}

footer a:hover {
    opacity: 0.8;
}

.shortcuts {
    margin-top: var(--spacing-sm);
    font-size: 0.85rem;
    opacity: 0.9;
}

kbd {
    background: rgba(255, 255, 255, 0.2);
    padding: 0.2rem 0.5rem;
    border-radius: var(--radius-sm);
    font-family: monospace;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }

    .info-bar {
        grid-template-columns: repeat(2, 1fr);
    }

    .mystery-number {
        width: 120px;
        height: 120px;
        font-size: 4rem;
    }

    #guess-input {
        font-size: 1.25rem;
    }

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

    .btn {
        width: 100%;
        justify-content: center;
    }

    .toast {
        bottom: 1rem;
        right: 1rem;
        left: 1rem;
    }
}

@media (max-width: 480px) {
    .game-card {
        padding: var(--spacing-md);
    }

    .mystery-number {
        width: 100px;
        height: 100px;
font-size: 3rem;
}
.info-bar {
    gap: var(--spacing-xs);
    padding: var(--spacing-sm);
}

.info-item .value {
    font-size: 1rem;
}

.guess-item {
    width: 40px;
    height: 40px;
    font-size: 0.9rem;
}

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