/* Vokabel-Trainer Klasse 7 - Styles */

:root {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent: #60a5fa;
    --accent-hover: #3b82f6;
    --success: #22c55e;
    --success-bg: rgba(34, 197, 94, 0.15);
    --error: #ef4444;
    --error-bg: rgba(239, 68, 68, 0.15);
    --warning: #f59e0b;
    --border: #475569;
}

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

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

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 1rem;
}

/* Header */
header {
    text-align: center;
    padding: 2rem 1rem;
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
    border-bottom: 1px solid var(--border);
    margin-bottom: 2rem;
}

header h1 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

header h1 .flag {
    font-size: 1.5rem;
}

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

#date-display {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: 0.5rem;
}

/* Settings Container */
#settings-container {
    background: var(--bg-secondary);
    border-radius: 16px;
    padding: 2rem;
    margin-bottom: 2rem;
}

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

.settings-section:last-child {
    margin-bottom: 0;
}

.settings-section h3 {
    color: var(--text-secondary);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 1rem;
}

/* Unit Selector */
#unit-selector {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.unit-btn {
    padding: 0.75rem 1.25rem;
    border: 2px solid var(--border);
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    transition: all 0.2s ease;
}

.unit-btn:hover {
    border-color: var(--accent);
    background: rgba(96, 165, 250, 0.1);
}

.unit-btn.active {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}

#vocab-count {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: 1rem;
}

/* Direction Selector */
.direction-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.direction-btn {
    padding: 0.75rem 1.25rem;
    border: 2px solid var(--border);
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    transition: all 0.2s ease;
}

.direction-btn:hover {
    border-color: var(--accent);
}

.direction-btn.active {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}

/* Start Button */
#start-btn {
    width: 100%;
    padding: 1rem 2rem;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-hover) 100%);
    color: #fff;
    border: none;
    border-radius: 12px;
    font-size: 1.2rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

#start-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(96, 165, 250, 0.3);
}

/* Quiz Container */
#quiz-container {
    background: var(--bg-secondary);
    border-radius: 16px;
    padding: 2rem;
}

.progress-container {
    margin-bottom: 1.5rem;
}

.progress-bar {
    height: 8px;
    background: var(--bg-tertiary);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 0.5rem;
}

#progress {
    height: 100%;
    background: linear-gradient(90deg, var(--accent) 0%, var(--success) 100%);
    border-radius: 4px;
    transition: width 0.3s ease;
    width: 0%;
}

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

/* Question Card */
.question-card {
    background: var(--bg-tertiary);
    border-radius: 12px;
    padding: 2rem;
    margin-bottom: 1.5rem;
}

.question-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

#question-direction {
    font-size: 1.5rem;
}

#question-unit {
    background: var(--bg-secondary);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

#question-text {
    font-size: 1.8rem;
    font-weight: 600;
    text-align: center;
    padding: 1rem 0;
    word-break: break-word;
}

/* Answers */
#answers {
    display: grid;
    gap: 0.75rem;
}

.answer-btn {
    width: 100%;
    padding: 1rem 1.5rem;
    background: var(--bg-tertiary);
    border: 2px solid var(--border);
    color: var(--text-primary);
    border-radius: 10px;
    font-size: 1.1rem;
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: left;
}

.answer-btn:hover:not(:disabled) {
    border-color: var(--accent);
    background: rgba(96, 165, 250, 0.1);
}

.answer-btn:disabled {
    cursor: default;
}

.answer-btn.correct {
    background: var(--success-bg);
    border-color: var(--success);
    color: var(--success);
}

.answer-btn.wrong {
    background: var(--error-bg);
    border-color: var(--error);
    color: var(--error);
}

/* Feedback */
#feedback {
    padding: 1rem;
    border-radius: 10px;
    text-align: center;
    font-size: 1.1rem;
    margin-bottom: 1rem;
}

#feedback.correct {
    background: var(--success-bg);
    color: var(--success);
    border: 1px solid var(--success);
}

#feedback.wrong {
    background: var(--error-bg);
    color: var(--error);
    border: 1px solid var(--error);
}

#feedback strong {
    color: var(--text-primary);
}

/* Next Button */
#next-btn {
    width: 100%;
    padding: 1rem;
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: 10px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

#next-btn:hover:not(:disabled) {
    background: var(--accent-hover);
}

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

/* Results */
#results {
    background: var(--bg-secondary);
    border-radius: 16px;
    padding: 2rem;
    text-align: center;
}

#results h2 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
}

#score-display {
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

#score-display.excellent { color: var(--success); }
#score-display.good { color: var(--accent); }
#score-display.okay { color: var(--warning); }
#score-display.needs-work { color: var(--error); }

#score-breakdown {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.score-item {
    background: var(--bg-tertiary);
    padding: 1rem 1.5rem;
    border-radius: 10px;
    min-width: 100px;
}

.score-item .value {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--accent);
}

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

/* Today History */
.today-history {
    background: var(--bg-tertiary);
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    text-align: left;
}

.today-history h3 {
    font-size: 1rem;
    margin-bottom: 0.75rem;
}

.history-avg {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.history-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.history-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.5rem;
    background: var(--bg-secondary);
    border-radius: 6px;
    font-size: 0.9rem;
}

.history-num {
    color: var(--text-secondary);
    min-width: 30px;
}

.history-time {
    color: var(--text-secondary);
}

.history-units {
    color: var(--accent);
}

.history-score {
    margin-left: auto;
}

/* Wrong Answers */
#wrong-answers {
    background: var(--bg-tertiary);
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    text-align: left;
}

#wrong-answers h3 {
    font-size: 1rem;
    margin-bottom: 1rem;
}

.wrong-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.wrong-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    background: var(--bg-secondary);
    border-radius: 8px;
    border-left: 3px solid var(--error);
    flex-wrap: wrap;
}

.wrong-direction {
    font-size: 0.9rem;
}

.wrong-question {
    font-weight: 600;
    color: var(--text-primary);
}

.wrong-arrow {
    color: var(--text-secondary);
}

.wrong-correct {
    color: var(--success);
    font-weight: 500;
}

.all-correct {
    text-align: center;
    padding: 2rem;
    font-size: 1.2rem;
    color: var(--success);
}

/* Result Buttons */
.result-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
}

.result-buttons button {
    padding: 1rem 2rem;
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

#restart-btn {
    background: var(--accent);
    color: #fff;
}

#restart-btn:hover {
    background: var(--accent-hover);
}

#new-settings-btn {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 2px solid var(--border);
}

#new-settings-btn:hover {
    border-color: var(--accent);
}

#stats-btn {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 2px solid var(--border);
}

#stats-btn:hover {
    border-color: var(--accent);
}

/* Stats Container */
#stats-container {
    background: var(--bg-secondary);
    border-radius: 16px;
    padding: 2rem;
}

.stats-summary h3 {
    margin-bottom: 1.5rem;
}

.stats-overview {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--bg-tertiary);
    padding: 1.5rem 2rem;
    border-radius: 12px;
    text-align: center;
    min-width: 120px;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent);
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

.stats-chart-section h4 {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

.chart-container {
    background: var(--bg-tertiary);
    border-radius: 12px;
    padding: 1rem;
    height: 250px;
}

#back-to-results-btn {
    margin-top: 1.5rem;
    padding: 0.75rem 1.5rem;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 2px solid var(--border);
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
}

#back-to-results-btn:hover {
    border-color: var(--accent);
}

/* Hidden */
.hidden {
    display: none !important;
}

/* Responsive */
@media (max-width: 600px) {
    .container {
        padding: 0.5rem;
    }
    
    header {
        padding: 1.5rem 1rem;
    }
    
    header h1 {
        font-size: 1.5rem;
    }
    
    #settings-container,
    #quiz-container,
    #results,
    #stats-container {
        padding: 1.25rem;
        border-radius: 12px;
    }
    
    .question-card {
        padding: 1.25rem;
    }
    
    #question-text {
        font-size: 1.4rem;
    }
    
    .answer-btn {
        padding: 0.875rem 1rem;
        font-size: 1rem;
    }
    
    #score-display {
        font-size: 3rem;
    }
    
    .unit-btn,
    .direction-btn {
        padding: 0.625rem 1rem;
        font-size: 0.9rem;
    }
    
    .wrong-item {
        font-size: 0.9rem;
    }
}