/* Science Placement Test - Green Theme */
:root {
    --primary-color: #059669;
    --primary-dark: #047857;
    --primary-light: #d1fae5;
    --success-color: #16a34a;
    --success-light: #dcfce7;
    --warning-color: #ca8a04;
    --warning-light: #fef9c3;
    --danger-color: #dc2626;
    --danger-light: #fee2e2;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'SF Mono', Monaco, 'Courier New', monospace;
    --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 15px rgba(0,0,0,0.1), 0 4px 6px rgba(0,0,0,0.05);
    --radius: 8px;
    --radius-lg: 12px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; }
body { font-family: var(--font-family); background-color: var(--gray-100); color: var(--gray-800); line-height: 1.6; min-height: 100vh; }
.container { max-width: 900px; margin: 0 auto; padding: 20px; }
.header { text-align: center; padding: 40px 20px; background: linear-gradient(135deg, var(--primary-color), var(--primary-dark)); color: white; border-radius: var(--radius-lg); margin-bottom: 30px; box-shadow: var(--shadow-lg); }
.header h1 { font-size: 2.5rem; font-weight: 700; margin-bottom: 10px; }
.header .subtitle { font-size: 1.2rem; opacity: 0.9; }
.info-card { background: white; border-radius: var(--radius-lg); padding: 25px 30px; margin-bottom: 20px; box-shadow: var(--shadow); }
.info-card h2 { font-size: 1.3rem; color: var(--gray-800); margin-bottom: 15px; padding-bottom: 10px; border-bottom: 2px solid var(--gray-100); }
.info-card p { color: var(--gray-600); }
.info-card ul, .info-card ol { color: var(--gray-600); padding-left: 25px; }
.info-card li { margin-bottom: 8px; }
.info-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 15px; margin-bottom: 20px; }
.info-item { background: white; border-radius: var(--radius); padding: 20px; text-align: center; box-shadow: var(--shadow); }
.info-icon { font-size: 2.5rem; margin-bottom: 10px; }
.info-item h3 { font-size: 1rem; color: var(--gray-700); margin-bottom: 5px; }
.info-item p { font-size: 0.9rem; color: var(--gray-500); }
.skills-grid { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 10px; }
.skill-tag { background: var(--primary-light); color: var(--primary-dark); padding: 6px 14px; border-radius: 20px; font-size: 0.85rem; font-weight: 500; }
.start-form { background: white; border-radius: var(--radius-lg); padding: 30px; box-shadow: var(--shadow); margin-bottom: 20px; }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-weight: 600; color: var(--gray-700); margin-bottom: 8px; }
.form-group input, .form-group select { width: 100%; padding: 12px 16px; border: 2px solid var(--gray-200); border-radius: var(--radius); font-size: 1rem; font-family: inherit; }
.form-group input:focus, .form-group select:focus { outline: none; border-color: var(--primary-color); box-shadow: 0 0 0 3px var(--primary-light); }
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 12px 24px; border: none; border-radius: var(--radius); font-size: 1rem; font-weight: 600; cursor: pointer; transition: all 0.2s; text-decoration: none; }
.btn-primary { background: var(--primary-color); color: white; }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-1px); }
.btn-secondary { background: var(--gray-200); color: var(--gray-700); }
.btn-secondary:hover { background: var(--gray-300); }
.btn-success { background: var(--success-color); color: white; }
.btn-large { width: 100%; padding: 16px 32px; font-size: 1.1rem; }
.back-link { text-align: center; margin-top: 20px; }
.back-link a { color: var(--primary-color); text-decoration: none; font-weight: 500; }
.footer { text-align: center; padding: 20px; color: var(--gray-500); font-size: 0.9rem; }
.test-header { background: white; border-radius: var(--radius-lg); padding: 20px 30px; margin-bottom: 20px; box-shadow: var(--shadow); display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 15px; position: sticky; top: 10px; z-index: 100; }
.test-info { display: flex; align-items: center; gap: 20px; }
.student-name { font-weight: 600; color: var(--gray-700); }
.timer { background: var(--gray-100); padding: 8px 16px; border-radius: var(--radius); font-family: var(--font-mono); font-size: 1.1rem; font-weight: 600; color: var(--gray-700); }
.timer.warning { background: var(--warning-light); color: var(--warning-color); }
.timer.danger { background: var(--danger-light); color: var(--danger-color); }
.progress-section { display: flex; align-items: center; gap: 15px; }
.progress-text { font-size: 0.9rem; color: var(--gray-600); }
.progress-bar { width: 200px; height: 8px; background: var(--gray-200); border-radius: 4px; overflow: hidden; }
.progress-fill { height: 100%; background: var(--primary-color); transition: width 0.3s; }
.question-card { background: white; border-radius: var(--radius-lg); padding: 30px; margin-bottom: 20px; box-shadow: var(--shadow); display: none; }
.question-card.active { display: block; }
.question-meta { display: flex; gap: 10px; margin-bottom: 15px; flex-wrap: wrap; }
.question-badge { padding: 4px 12px; border-radius: 20px; font-size: 0.8rem; font-weight: 500; }
.badge-skill { background: var(--primary-light); color: var(--primary-dark); }
.badge-category { background: #dbeafe; color: #1d4ed8; }
.badge-grade { background: var(--gray-100); color: var(--gray-600); }
.question-number { font-size: 0.9rem; color: var(--gray-500); margin-bottom: 10px; }
.question-text { font-size: 1.2rem; color: var(--gray-800); margin-bottom: 25px; line-height: 1.7; }
.options-list { list-style: none; }
.option-item { margin-bottom: 12px; }
.option-label { display: flex; align-items: flex-start; padding: 15px 20px; background: var(--gray-50); border: 2px solid var(--gray-200); border-radius: var(--radius); cursor: pointer; transition: all 0.2s; }
.option-label:hover { border-color: var(--primary-color); background: var(--primary-light); }
.option-label input { display: none; }
.option-label:has(input:checked) { border-color: var(--primary-color); background: var(--primary-light); }
.option-label:has(input:checked) .option-text { color: var(--primary-dark); font-weight: 600; }
.option-marker { width: 28px; height: 28px; border: 2px solid var(--gray-300); border-radius: 50%; display: flex; align-items: center; justify-content: center; margin-right: 15px; font-weight: 600; color: var(--gray-500); flex-shrink: 0; }
.option-label:has(input:checked) .option-marker { background: var(--primary-color); border-color: var(--primary-color); color: white; }
.option-text { flex: 1; color: var(--gray-700); line-height: 1.5; }
.question-nav { display: flex; justify-content: space-between; align-items: center; margin-top: 30px; padding-top: 20px; border-top: 1px solid var(--gray-200); }
.nav-hint { color: var(--gray-500); font-size: 0.9rem; }
.nav-buttons { display: flex; gap: 10px; }
.question-navigator { background: white; border-radius: var(--radius-lg); padding: 20px; margin-bottom: 20px; box-shadow: var(--shadow); }
.navigator-title { font-size: 0.9rem; color: var(--gray-600); margin-bottom: 15px; }
.navigator-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(36px, 1fr)); gap: 8px; }
.nav-btn { width: 36px; height: 36px; border: 2px solid var(--gray-200); border-radius: var(--radius); background: white; color: var(--gray-600); font-size: 0.85rem; font-weight: 500; cursor: pointer; }
.nav-btn:hover { border-color: var(--primary-color); }
.nav-btn.answered { background: var(--success-light); border-color: var(--success-color); color: var(--success-color); }
.nav-btn.current { background: var(--primary-color); border-color: var(--primary-color); color: white; }
.submit-section { background: white; border-radius: var(--radius-lg); padding: 25px 30px; box-shadow: var(--shadow); text-align: center; }
.submit-section p { color: var(--gray-600); margin-bottom: 20px; }
.unanswered-warning { background: var(--warning-light); color: var(--warning-color); padding: 15px; border-radius: var(--radius); margin-bottom: 20px; }
.results-header { background: linear-gradient(135deg, var(--primary-color), var(--primary-dark)); color: white; border-radius: var(--radius-lg); padding: 40px; margin-bottom: 30px; text-align: center; }
.results-header h1 { font-size: 2rem; margin-bottom: 10px; }
.results-header .student-info { opacity: 0.9; margin-bottom: 20px; }
.score-display { display: flex; justify-content: center; gap: 40px; flex-wrap: wrap; }
.score-item { text-align: center; }
.score-value { font-size: 3rem; font-weight: 700; display: block; }
.score-label { font-size: 0.9rem; opacity: 0.8; }
.summary-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 20px; margin-bottom: 30px; }
.summary-card { background: white; border-radius: var(--radius-lg); padding: 25px; box-shadow: var(--shadow); }
.summary-card h3 { font-size: 1.1rem; color: var(--gray-700); margin-bottom: 20px; }
.skill-breakdown { margin-bottom: 30px; }
.skill-row { display: flex; align-items: center; padding: 15px 0; border-bottom: 1px solid var(--gray-100); }
.skill-row:last-child { border-bottom: none; }
.skill-info { flex: 1; }
.skill-name { font-weight: 600; color: var(--gray-800); margin-bottom: 4px; }
.skill-grade { font-size: 0.85rem; color: var(--gray-500); }
.skill-score { display: flex; align-items: center; gap: 15px; }
.skill-bar { width: 100px; height: 8px; background: var(--gray-200); border-radius: 4px; overflow: hidden; }
.skill-fill { height: 100%; border-radius: 4px; }
.skill-fill.excellent { background: var(--success-color); }
.skill-fill.good { background: #22c55e; }
.skill-fill.needs-work { background: var(--warning-color); }
.skill-fill.struggling { background: var(--danger-color); }
.skill-percent { font-weight: 600; min-width: 45px; text-align: right; }
.skill-percent.excellent { color: var(--success-color); }
.skill-percent.good { color: #22c55e; }
.skill-percent.needs-work { color: var(--warning-color); }
.skill-percent.struggling { color: var(--danger-color); }
.recommendations { background: white; border-radius: var(--radius-lg); padding: 30px; margin-bottom: 30px; box-shadow: var(--shadow); }
.recommendations h2 { font-size: 1.3rem; color: var(--gray-800); margin-bottom: 20px; }
.recommendation-item { display: flex; gap: 15px; padding: 20px; background: var(--gray-50); border-radius: var(--radius); margin-bottom: 15px; border-left: 4px solid var(--primary-color); }
.recommendation-item.priority-high { border-left-color: var(--danger-color); background: var(--danger-light); }
.recommendation-item.priority-medium { border-left-color: var(--warning-color); background: var(--warning-light); }
.recommendation-item.priority-low { border-left-color: var(--success-color); background: var(--success-light); }
.rec-icon { font-size: 1.5rem; }
.rec-content h4 { font-size: 1rem; color: var(--gray-800); margin-bottom: 5px; }
.rec-content p { font-size: 0.9rem; color: var(--gray-600); }
.rec-standard { font-size: 0.8rem; color: var(--gray-500); margin-top: 8px; font-style: italic; }
.detailed-results { background: white; border-radius: var(--radius-lg); padding: 30px; margin-bottom: 30px; box-shadow: var(--shadow); }
.detailed-results h2 { font-size: 1.3rem; color: var(--gray-800); margin-bottom: 20px; }
.results-filter { display: flex; gap: 10px; margin-bottom: 20px; flex-wrap: wrap; }
.filter-btn { padding: 8px 16px; border: 2px solid var(--gray-200); border-radius: var(--radius); background: white; color: var(--gray-600); font-size: 0.9rem; cursor: pointer; }
.filter-btn:hover { border-color: var(--primary-color); }
.filter-btn.active { background: var(--primary-color); border-color: var(--primary-color); color: white; }
.result-item { padding: 20px; border: 1px solid var(--gray-200); border-radius: var(--radius); margin-bottom: 15px; }
.result-item.correct { border-left: 4px solid var(--success-color); }
.result-item.incorrect { border-left: 4px solid var(--danger-color); background: var(--danger-light); }
.result-header { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 10px; flex-wrap: wrap; gap: 10px; }
.result-badges { display: flex; gap: 8px; flex-wrap: wrap; }
.result-status { padding: 4px 12px; border-radius: 20px; font-size: 0.8rem; font-weight: 600; }
.result-status.correct { background: var(--success-light); color: var(--success-color); }
.result-status.incorrect { background: var(--danger-light); color: var(--danger-color); }
.result-question { font-size: 1rem; color: var(--gray-800); margin-bottom: 15px; line-height: 1.6; }
.result-answers { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 15px; }
.answer-box { padding: 12px 15px; border-radius: var(--radius); font-size: 0.9rem; }
.answer-box.student-answer { background: var(--gray-100); border: 1px solid var(--gray-300); }
.answer-box.student-answer.wrong { background: var(--danger-light); border-color: var(--danger-color); }
.answer-box.correct-answer { background: var(--success-light); border: 1px solid var(--success-color); }
.answer-label { font-size: 0.75rem; color: var(--gray-500); text-transform: uppercase; margin-bottom: 5px; }
.answer-value { font-weight: 600; color: var(--gray-800); }
.result-standard { margin-top: 15px; padding-top: 15px; border-top: 1px solid var(--gray-200); font-size: 0.85rem; color: var(--gray-500); }
.print-section { text-align: center; margin-bottom: 30px; }
.print-section .btn { margin: 0 10px; }
@media print {
    body { background: white; font-size: 11pt; }
    .container { max-width: 100%; padding: 0; }
    .no-print { display: none !important; }
    .results-header { background: var(--gray-800) !important; -webkit-print-color-adjust: exact; print-color-adjust: exact; }
    .summary-card, .recommendations, .detailed-results { box-shadow: none; border: 1px solid var(--gray-300); page-break-inside: avoid; }
    .skill-fill { -webkit-print-color-adjust: exact; print-color-adjust: exact; }
    .print-section { display: none; }
}
@media (max-width: 768px) {
    .header h1 { font-size: 1.8rem; }
    .test-header { position: relative; top: 0; }
    .test-info { flex-direction: column; align-items: flex-start; gap: 10px; }
    .progress-section { width: 100%; }
    .progress-bar { flex: 1; }
    .question-nav { flex-direction: column; gap: 15px; }
    .nav-buttons { width: 100%; }
    .nav-buttons .btn { flex: 1; }
    .score-value { font-size: 2rem; }
    .result-answers { grid-template-columns: 1fr; }
}