.flashcard-container{perspective:1000px;cursor:pointer}.flashcard-inner{width:100%;height:100%;transform-style:preserve-3d;transition:transform .55s cubic-bezier(.23,1,.32,1);position:relative}.flashcard-inner.flipped{transform:rotateY(180deg)}.flashcard-face{backface-visibility:hidden;border-radius:var(--radius-xl);text-align:center;flex-direction:column;justify-content:center;align-items:center;padding:32px;display:flex;position:absolute;inset:0}.flashcard-front{background:var(--bg-card);border:1.5px solid var(--border);box-shadow:var(--shadow-md)}.flashcard-back{background:var(--accent-gradient);box-shadow:var(--shadow-accent);transform:rotateY(180deg)}.tools-grid{grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:16px;display:grid}.tool-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);color:inherit;transition:var(--transition);cursor:pointer;flex-direction:column;gap:12px;padding:24px;text-decoration:none;display:flex}.tool-card:hover{border-color:var(--accent-primary);box-shadow:var(--shadow-md);transform:translateY(-3px)}.tool-icon{border-radius:14px;flex-shrink:0;justify-content:center;align-items:center;width:56px;height:56px;font-size:26px;display:flex;box-shadow:0 4px 14px #00000026}.schedule-day{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);transition:var(--transition);padding:16px 20px}.schedule-day:hover{box-shadow:var(--shadow-sm)}input[type=range]{appearance:none;border-radius:var(--radius-full);background:var(--border);outline:none;height:6px;padding:0}input[type=range]::-webkit-slider-thumb{appearance:none;background:var(--accent-primary);cursor:pointer;width:20px;height:20px;transition:var(--transition);border-radius:50%;box-shadow:0 2px 8px #6366f166}input[type=range]::-webkit-slider-thumb:hover{transform:scale(1.2)}.count-grid-4{grid-template-columns:repeat(4,1fr);gap:10px;display:grid}.tutor-mode-btn{border-radius:var(--radius-full);border:1.5px solid var(--border);background:var(--bg-card);cursor:pointer;color:var(--text-secondary);transition:var(--transition);align-items:center;gap:8px;padding:8px 16px;font-family:Inter,sans-serif;font-size:13px;font-weight:600;display:flex}