.study-loading{text-align:center;padding:40px;color:var(--ink-secondary)}.study__timer{margin:0 0 16px;font-variant-numeric:tabular-nums;font-size:.875rem}.study__question-label,.study__timer{font-weight:600;color:var(--ink-secondary)}.study__question-label{font-size:.72rem;text-transform:uppercase;letter-spacing:.06em;margin:0 0 12px}.study__prompt{font-family:var(--font-display);font-size:clamp(1.375rem,2.4vw,1.75rem);font-weight:400;line-height:1.35;margin:0 0 28px;white-space:pre-wrap;color:#1a1a1a}.study__flashcard{display:flex;flex-direction:column;gap:16px}.study__answer{padding:18px 20px;background:#fff;border-radius:16px;border:1px solid #e8e8e8;font-family:var(--font-display);font-size:1.0625rem;line-height:1.55;white-space:pre-wrap;overflow-wrap:anywhere;word-break:break-word}.study__ratings{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}@media (min-width:520px){.study__ratings{grid-template-columns:repeat(4,1fr)}}.study__rating-btn{min-height:44px;border:1px solid #e3e3e3;border-radius:14px;background:#fff;cursor:pointer;font-weight:600}.study__rating-btn:hover{background:#fafafa}.study__choices{display:flex;flex-direction:column;gap:12px;border:none;margin:0;padding:0}.study__choice{display:block;text-align:left;padding:18px 20px;border:1px solid #e3e3e3;border-radius:16px;background:#fff;cursor:pointer;transition:border-color var(--transition-fast),box-shadow var(--transition-fast);font-size:.98rem;line-height:1.45}.study__choice:hover{border-color:#cfcfcf}.study__choice--selected{border-color:var(--ink);box-shadow:inset 0 0 0 1px var(--ink)}.study__text-answer{display:flex;flex-direction:column;gap:12px}.study__textarea{width:100%;padding:16px 18px;border:1px solid #e3e3e3;border-radius:16px;background:#fff;resize:vertical;font-size:1rem;line-height:1.5}.study__textarea:focus{outline:2px solid var(--focus-ring)}.study__matching{display:flex;flex-direction:column;gap:12px}.study__match-row{display:grid;grid-template-columns:1fr 1fr;gap:12px;align-items:center;padding:14px 16px;border:1px solid #e3e3e3;border-radius:16px;background:#fff}.study__match-left{font-weight:500}.study__match-row select{min-height:44px;padding:0 10px;border-radius:10px;border:1px solid #e3e3e3;background:#fff}@media (max-width:480px){.study__match-row{grid-template-columns:1fr}}@media (min-width:961px){.study__prompt{font-size:1.875rem;margin-bottom:32px}.study__choice{padding:20px 22px;font-size:1.02rem}.study__choice:hover{background:#fafafa}.study__textarea{min-height:140px;font-size:1.0625rem}.study__answer{font-size:1.125rem;padding:22px 24px}}.study__source-flag{font-size:.75rem;color:var(--warning);margin-bottom:8px}.study__flashcard-label{font-size:.875rem;color:var(--ink-secondary);margin-bottom:8px}.study__feynman-result{display:flex;flex-direction:column;gap:16px}.study__feynman-score{font-size:1.25rem}.study__feynman-metrics{display:flex;gap:12px;flex-wrap:wrap;font-size:.875rem;color:var(--ink-secondary)}.study__feynman-followup{padding:12px;background:var(--info-soft);border-radius:var(--radius-sm)}.study__voice-bar{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.study__voice-btn{display:inline-flex;align-items:center;gap:8px;min-height:44px;padding:0 16px;border-radius:999px;border:1px solid var(--line);background:var(--surface);color:var(--ink);font:inherit;font-size:.875rem;font-weight:500;cursor:pointer}.study__voice-btn:hover:not(:disabled){background:var(--surface-muted)}.study__voice-btn:disabled{opacity:.6;cursor:not-allowed}.study__voice-btn--active{border-color:var(--error);color:var(--error)}.study__voice-btn--pulse{animation:study-voice-pulse 1.4s ease-in-out infinite}@keyframes study-voice-pulse{0%,to{box-shadow:0 0 0 0 color-mix(in srgb,var(--error) 35%,transparent)}50%{box-shadow:0 0 0 6px color-mix(in srgb,var(--error) 0%,transparent)}}.study__voice-timer{font-variant-numeric:tabular-nums;font-size:.875rem;color:var(--ink-secondary)}.study__voice-privacy{margin:0;font-size:.75rem;color:var(--ink-secondary);line-height:1.45}.study__voice-error{margin:0;font-size:.875rem;color:var(--error)}[data-theme=dark] .study__textarea,[data-theme=dark] .study__voice-btn{background:#1a1a1a;border-color:#333;color:#f0f0f0}[data-reduced-motion=true] .study__voice-btn--pulse{animation:none}[data-theme=dark] .study__prompt{color:#f0f0f0}