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var(--border);border-radius:20px;min-height:200px;padding:28px;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;cursor:pointer;box-shadow:var(--shadow);margin-bottom:18px}.flashcard .fc-text{font-size:22px;font-weight:800;line-height:1.4}.flashcard .fc-hint{margin-top:14px;font-size:13px;color:var(--ink-soft)}.upgrade-banner{background:linear-gradient(120deg,var(--ink),#1a2b36);color:#fff;border-radius:18px;padding:24px;margin-bottom:24px;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}.upgrade-banner h3{margin:0 0 4px;font-size:18px;font-weight:900}.upgrade-banner p{margin:0;color:#b9c6cf;font-size:14px}.empty{text-align:center;color:var(--ink-soft);padding:40px 20px}.spin{display:inline-block;width:18px;height:18px;border:3px solid var(--sky-light);border-top-color:var(--brand-blue);border-radius:50%;animation:spin .7s linear infinite}@keyframes spin{to{transform:rotate(1turn)}}@media 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14px}.exam-question{font-size:15px;padding:12px}.exam-option{font-size:14px;padding:12px 14px}.flashcard{min-height:160px;padding:20px}.flashcard .fc-text{font-size:19px}.menu-dropdown{right:0;left:auto;width:min(220px,calc(100vw - 24px))}.thank-letter{padding:18px}}