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4px;color:#111827}.section-desc{font-size:14px;color:#6b7280;margin:0 0 14px}.unit-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:14px}.unit-card{background:linear-gradient(135deg,#f0f9ff,#e0f2fe);border:1px solid #bae6fd;border-radius:16px;padding:18px;text-align:left;cursor:pointer;transition:transform .15s,box-shadow .15s}.unit-card:hover{transform:translateY(-2px);box-shadow:0 8px 24px #0ea5e926}.unit-card-title{font-size:17px;font-weight:600;color:#0c4a6e;margin-bottom:4px}.unit-card-desc{font-size:13px;color:#475569;margin-bottom:12px}.unit-card-progress{font-size:12px;color:#64748b;margin-bottom:6px}.progress-bar{height:6px;background:#cbd5e1;border-radius:999px;overflow:hidden}.progress-bar-fill{height:100%;background:linear-gradient(90deg,#2563eb,#0ea5e9);border-radius:999px;transition:width .3s ease}.lesson-list{display:flex;flex-direction:column;gap:12px}.lesson-card{display:flex;align-items:center;gap:14px;background:#f9fafb;border:1px solid #e5e7eb;border-radius:14px;padding:14px 16px;text-align:left;cursor:pointer;transition:background .15s,border-color .15s,transform .1s}.lesson-card:hover:not(:disabled){background:#f0f9ff;border-color:#bae6fd;transform:translate(4px)}.lesson-card--completed{background:#f0fdf4;border-color:#86efac}.lesson-card--locked{opacity:.55;cursor:not-allowed}.lesson-card--locked:hover{transform:none}.lesson-card-number{width:36px;height:36px;border-radius:50%;background:#2563eb;color:#fff;font-weight:600;font-size:15px;display:flex;align-items:center;justify-content:center;flex-shrink:0}.lesson-card--completed .lesson-card-number{background:#16a34a}.lesson-card--locked 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#facc15}.flashcard--review .flashcard-inner{background:linear-gradient(135deg,#fefce8,#fef9c3)}.review-empty{text-align:center;padding:40px 20px;color:#6b7280}.rating-section{margin-top:16px;text-align:center}.rating-prompt{font-size:14px;color:#374151;margin-bottom:12px}.rating-buttons{display:flex;justify-content:center;gap:10px;flex-wrap:wrap}.rating-btn{padding:10px 18px;border:none;border-radius:10px;font-size:14px;font-weight:500;cursor:pointer;transition:transform .1s,box-shadow .15s}.rating-btn:hover{transform:translateY(-2px)}.rating-btn--again{background:#fee2e2;color:#b91c1c}.rating-btn--again:hover{box-shadow:0 4px 12px #b91c1c40}.rating-btn--hard{background:#ffedd5;color:#c2410c}.rating-btn--hard:hover{box-shadow:0 4px 12px #c2410c40}.rating-btn--good{background:#d1fae5;color:#047857}.rating-btn--good:hover{box-shadow:0 4px 12px #04785740}.rating-btn--easy{background:#dbeafe;color:#1d4ed8}.rating-btn--easy:hover{box-shadow:0 4px 12px 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16px}.app-card{border-radius:18px;padding:18px 14px 22px}.flashcard{max-width:100%}.category-row{max-height:80px;overflow-y:auto}}