/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --success-color: #48bb78;
    --danger-color: #f56565;
    --warning-color: #ed8936;
    --bg-light: #f7fafc;
    --bg-dark: #1a202c;
    --text-light: #2d3748;
    --text-dark: #e2e8f0;
    --card-light: #ffffff;
    --card-dark: #2d3748;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    min-height: 100vh;
    padding: 20px;
    transition: background 0.3s ease;
}

body.dark-mode {
    background: linear-gradient(135deg, #1a202c 0%, #2d3748 100%);
}

/* Developer Header */
.developer-header {
    text-align: center;
    color: white;
    margin-bottom: 30px;
    animation: fadeInDown 0.8s ease;
}

.developer-header .brand h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.developer-header .tagline {
    font-size: 1.2em;
    opacity: 0.9;
    font-style: italic;
}

/* Container */
.container {
    max-width: 800px;
    margin: 0 auto;
}

/* Settings Panel */
.settings-panel {
    background: rgba(255, 255, 255, 0.95);
    padding: 20px;
    border-radius: 15px;
    margin-bottom: 20px;
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    animation: fadeIn 0.8s ease;
}

body.dark-mode .settings-panel {
    background: var(--card-dark);
    color: var(--text-dark);
}

.setting-group {
    display: flex;
    align-items: center;
    gap: 10px;
}

.setting-group label {
    font-weight: 600;
}

.setting-group select {
    padding: 8px 12px;
    border: 2px solid var(--primary-color);
    border-radius: 8px;
    font-size: 1em;
    cursor: pointer;
    transition: all 0.3s ease;
}

.setting-group select:hover {
    border-color: var(--secondary-color);
    transform: translateY(-2px);
}

.setting-group input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
}

/* Game Card */
.game-card {
    background: rgba(255, 255, 255, 0.95);
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    animation: fadeInUp 0.8s ease;
}

body.dark-mode .game-card {
    background: var(--card-dark);
    color: var(--text-dark);
}

/* Game Info */
.game-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 15px;
    margin-bottom: 30px;
}

.info-item {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 15px;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

.info-item .label {
    display: block;
    font-size: 0.9em;
    opacity: 0.9;
    margin-bottom: 5px;
}

.info-item span:last-child {
    font-size: 1.5em;
    font-weight: bold;
}

/* Message Box */
.message-box {
    background: linear-gradient(135deg, #e6f7ff, #bae7ff);
    padding: 20px;
    border-radius: 12px;
    text-align: center;
    font-size: 1.2em;
    font-weight: 600;
    margin-bottom: 25px;
    min-height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.message-box.success {
    background: linear-gradient(135deg, #c6f6d5, #9ae6b4);
    color: #22543d;
}

.message-box.error {
    background: linear-gradient(135deg, #fed7d7, #fc8181);
    color: #742a2a;
}

.message-box.warning {
    background: linear-gradient(135deg, #feebc8, #fbd38d);
    color: #7c2d12;
}

/* Input Group */
.input-group {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

#guessInput {
    flex: 1;
    padding: 15px;
    font-size: 1.1em;
    border: 3px solid var(--primary-color);
    border-radius: 10px;
    transition: all 0.3s ease;
}

#guessInput:focus {
    outline: none;
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.2);
    transform: translateY(-2px);
}

body.dark-mode #guessInput {
    background: #4a5568;
    color: var(--text-dark);
    border-color: var(--primary-color);
}

#guessBtn {
    padding: 15px 30px;
    font-size: 1.1em;
    font-weight: 600;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
}

#guessBtn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(102, 126, 234, 0.4);
}

#guessBtn:active {
    transform: translateY(-1px);
}

/* Hint Box */
.hint-box {
    background: #fef3c7;
    border-left: 4px solid #f59e0b;
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 1em;
}

/* Guess History */
.guess-history {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
    min-height: 40px;
}

.guess-chip {
    background: #e2e8f0;
    padding: 8px 15px;
    border-radius: 20px;
    font-size: 0.95em;
    font-weight: 500;
    animation: popIn 0.3s ease;
}

.guess-chip.high {
    background: #fed7d7;
    color: #c53030;
}

.guess-chip.low {
    background: #bee3f8;
    color: #2c5282;
}

body.dark-mode .guess-chip {
    background: #4a5568;
    color: var(--text-dark);
}

/* Reset Button */
.reset-btn {
    width: 100%;
    padding: 15px;
    font-size: 1.1em;
    font-weight: 600;
    background: linear-gradient(135deg, #ed8936, #dd6b20);
    color: white;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.reset-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(237, 137, 54, 0.4);
}

/* Leaderboard */
.leaderboard {
    background: rgba(255, 255, 255, 0.95);
    padding: 25px;
    border-radius: 15px;
    margin-top: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    animation: fadeIn 1s ease;
}

body.dark-mode .leaderboard {
    background: var(--card-dark);
    color: var(--text-dark);
}

.leaderboard h3 {
    text-align: center;
    margin-bottom: 20px;
    font-size: 1.5em;
    color: var(--primary-color);
}

body.dark-mode .leaderboard h3 {
    color: var(--text-dark);
}

.leaderboard-entry {
    display: flex;
    justify-content: space-between;
    padding: 12px;
    background: #f7fafc;
    border-radius: 8px;
    margin-bottom: 10px;
    transition: all 0.3s ease;
}

body.dark-mode .leaderboard-entry {
    background: #4a5568;
}

.leaderboard-entry:hover {
    transform: translateX(5px);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

.leaderboard-entry.rank-1 {
    background: linear-gradient(135deg, #ffd700, #ffed4e);
    font-weight: bold;
}

.leaderboard-entry.rank-2 {
    background: linear-gradient(135deg, #c0c0c0, #e8e8e8);
    font-weight: bold;
}

.leaderboard-entry.rank-3 {
    background: linear-gradient(135deg, #cd7f32, #e9b57a);
    font-weight: bold;
}

.empty-leaderboard {
    text-align: center;
    color: #a0aec0;
    font-style: italic;
}

/* Developer Footer */
.developer-footer {
    margin-top: 40px;
    padding: 30px;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    animation: fadeIn 1.2s ease;
}

body.dark-mode .developer-footer {
    background: var(--card-dark);
    color: var(--text-dark);
}

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

.developer-info h3 {
    color: var(--primary-color);
    margin-bottom: 10px;
    font-size: 1.5em;
}

body.dark-mode .developer-info h3 {
    color: var(--text-dark);
}

.developer-info p {
    margin-bottom: 15px;
    font-size: 1.1em;
}

.contact-links {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

.contact-links a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    padding: 10px 20px;
    background: rgba(102, 126, 234, 0.1);
    border-radius: 8px;
    transition: all 0.3s ease;
}

.contact-links a:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-3px);
}

.footer-note {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 2px solid rgba(102, 126, 234, 0.2);
}

.footer-note p {
    color: #718096;
    font-size: 0.95em;
    margin: 5px 0;
}

body.dark-mode .footer-note p {
    color: #a0aec0;
}

/* 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 popIn {
    0% {
        transform: scale(0);
        opacity: 0;
    }
    50% {
        transform: scale(1.1);
    }
    100% {
        transform: scale(1);
        opacity: 1;
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .developer-header .brand h1 {
        font-size: 1.8em;
    }
    
    .settings-panel {
        flex-direction: column;
        gap: 15px;
    }
    
    .game-card {
        padding: 25px;
    }
    
    .input-group {
        flex-direction: column;
    }
    
    #guessBtn {
        width: 100%;
    }
    
    .contact-links {
        flex-direction: column;
        gap: 10px;
    }
}

@media (max-width: 480px) {
    body {
        padding: 10px;
    }
    
    .developer-header .brand h1 {
        font-size: 1.5em;
    }
    
    .game-info {
        grid-template-columns: 1fr 1fr;
    }
}