/* =========================================
   ТРЕМАЖЁР ШКОЛЫ №777 - ТЕМА УЧЕНИКА
   Colors based on Platform Teachers & Logo
========================================= */

:root {
    /* Primary Brand Color (Indigo/Blue from Teachers Platform) */
    --primary-color: #4F46E5; 
    --primary-hover: #4338CA;
    
    /* Success / Action Color (Green from Logo/Math Site) */
    --success-color: #10B981;
    --success-bg: rgba(16, 185, 129, 0.1);
    
    /* Danger / Error Color (Red for Timer/Wrong Answers) */
    --danger-color: #EF4444;
    --danger-bg: rgba(239, 68, 68, 0.1);
    
    /* Warning (Orange for Medium scores) */
    --warning-color: #F59E0B;
    
    /* Backgrounds & Text */
    --bg-body: #F3F4F6;       /* Light gray background */
    --bg-card: #FFFFFF;       /* White cards */
    --text-main: #1F2937;     /* Dark gray text */
    --text-muted: #6B7280;    /* Gray hints */
    --border-color: #E5E7EB;  /* Light borders */
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --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);
}

body.trainer-page {
    font-family: 'Inter', 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-body);
    color: var(--text-main);
    line-height: 1.5;
}

/* --- Header for Student Test --- */
.student-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: white;
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow-sm);
}

.header-info h5 { margin: 0; font-weight: 700; color: var(--primary-color); }
.header-info small { color: var(--text-muted); font-size: 0.85rem; }

.timer-badge {
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--text-main);
    background: var(--bg-body);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-variant-numeric: tabular-nums;
}

.timer-badge.warning {
    color: var(--danger-color);
    animation: pulse-red 1s infinite;
}

@keyframes pulse-red {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* --- Question Cards --- */
.question-container {
    max-width: 800px;
    margin: 2rem auto;
    padding: 0 1rem;
}

.q-card {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-md);
    border-left: 5px solid transparent; /* Will be set by JS or class */
    transition: transform 0.2s ease;
}

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

.q-meta {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
    align-items: center;
}

.q-number {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--text-muted);
    letter-spacing: 0.05em;
}

.q-type-badge {
    font-size: 0.7rem;
    font-weight: 600;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    background: #EEF2FF;
    color: var(--primary-color);
}

.q-text {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1.2rem;
    color: var(--text-main);
}

/* --- Interactive Options (The "Tiles") --- */
.options-grid {
    display: grid;
    gap: 0.75rem;
}

.option-tile {
    display: flex;
    align-items: center;
    padding: 1rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    background: white;
    user-select: none;
}

.option-tile:hover {
    border-color: var(--primary-color);
    background: #FAFAFE;
}

.option-tile.selected {
    border-color: var(--primary-color);
    background: #EEF2FF; /* Very light indigo */
    box-shadow: inset 0 0 0 1px var(--primary-color);
}

.option-letter {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--bg-body);
    color: var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    margin-right: 1rem;
    flex-shrink: 0;
    transition: all 0.2s;
}

.option-tile.selected .option-letter {
    background: var(--primary-color);
    color: white;
}

.option-text {
    font-size: 1rem;
    color: var(--text-main);
}

/* Input fields for short answers */
.short-answer-input {
    width: 100%;
    padding: 0.8rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    outline: none;
    transition: border-color 0.2s;
}

.short-answer-input:focus {
    border-color: var(--primary-color);
}

/* --- Submit Button --- */
.submit-area {
    text-align: center;
    margin-top: 2rem;
    padding-bottom: 3rem;
}

.btn-submit-test {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 1rem 3rem;
    font-size: 1.1rem;
    font-weight: 700;
    border-radius: 50px;
    cursor: pointer;
    box-shadow: 0 4px 14px rgba(79, 70, 229, 0.4);
    transition: all 0.2s;
}

.btn-submit-test:hover {
    background: var(--primary-hover);
    transform: scale(1.02);
}

/* --- Results Screen Styles --- */
.result-hero {
    background: white;
    border-radius: 16px;
    padding: 2.5rem;
    text-align: center;
    box-shadow: var(--shadow-lg);
    margin-bottom: 2rem;
}

.grade-circle {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3.5rem;
    font-weight: 900;
    margin: 0 auto 1.5rem;
    color: white;
    box-shadow: var(--shadow-md);
}

/* Grade colors */
.grade-5 { background: linear-gradient(135deg, #10B981, #059669); } /* Green */
.grade-4 { background: linear-gradient(135deg, #4F46E5, #4338CA); } /* Indigo */
.grade-3 { background: linear-gradient(135deg, #F59E0B, #D97706); } /* Orange */
.grade-2 { background: linear-gradient(135deg, #EF4444, #DC2626); } /* Red */

.score-stats {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 1.5rem;
}

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

.stat-value {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-main);
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
}

.progress-bar-container {
    width: 100%;
    height: 12px;
    background: var(--bg-body);
    border-radius: 6px;
    overflow: hidden;
    margin: 1.5rem 0;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--success-color));
    border-radius: 6px;
    transition: width 1s ease-out;
}

/* Review List */
.review-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.review-item {
    background: white;
    border-radius: 10px;
    padding: 1.2rem;
    border-left: 4px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.review-item.correct { border-left-color: var(--success-color); }
.review-item.incorrect { border-left-color: var(--danger-color); }

.review-q { font-weight: 600; margin-bottom: 0.5rem; }
.review-ans-row { font-size: 0.9rem; color: var(--text-muted); display: flex; gap: 1rem; flex-wrap: wrap;}
.badge-correct { color: var(--success-color); font-weight: 600; }
.badge-wrong { color: var(--danger-color); font-weight: 600; text-decoration: line-through; }