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.study-card-front,.study-card-flip .study-card-back{backface-visibility:hidden;border:1px solid var(--border-subtle);background:var(--bg-card-high);text-align:center;border-radius:16px;flex-direction:column;justify-content:center;align-items:center;padding:32px;transition:transform .5s cubic-bezier(.4,0,.2,1);display:flex;position:absolute;inset:0}.study-card-flip .study-card-back{transform:rotateY(180deg)}.study-card-flip.flipped .study-card-front{transform:rotateY(-180deg)}.study-card-flip.flipped .study-card-back{transform:rotateY(0)}.study-card-side-label{font-family:var(--font-label);text-transform:uppercase;letter-spacing:.1em;color:var(--text-muted);margin-bottom:16px;font-size:10px;font-weight:700}.study-card-text{font-family:var(--font-display);font-size:20px;font-weight:600;line-height:1.45}.study-card-hint{font-family:var(--font-label);text-transform:uppercase;letter-spacing:.1em;color:var(--text-muted);font-size:10px;position:absolute;bottom:16px}.study-rating-row{flex-wrap:wrap;justify-content:center;gap:10px;display:flex}.study-rating-btn{min-width:100px;color:var(--rating-color,var(--text-primary));font-family:var(--font-display);cursor:pointer;transition:var(--transition);background:#ffffff08;border:1px solid #ffffff1a;border-radius:10px;flex:1;padding:10px 14px;font-size:13px;font-weight:600}.study-rating-btn:hover{border-color:var(--rating-color,var(--border-subtle));background:#ffffff12}.pomodoro-btn-main{background:var(--grad-primary);color:#fff;cursor:pointer;width:68px;height:68px;transition:var(--transition);border:none;border-radius:50%;justify-content:center;align-items:center;display:flex;box-shadow:0 4px 20px #494bd666}.pomodoro-btn-main:hover{transform:scale(1.05)}.pomodoro-center{flex-direction:column;justify-content:center;align-items:center;display:flex;position:absolute;inset:0}.pomodoro-time{font-family:var(--font-display);font-size:48px;font-weight:700;line-height:1}.pomodoro-phase-label{font-family:var(--font-label);text-transform:uppercase;letter-spacing:.08em;opacity:.7;margin-top:6px;font-size:11px;font-weight:600}.pomodoro-ring-track{fill:none;stroke:var(--bg-card-high);stroke-width:8px}.pomodoro-ring-progress{fill:none;stroke-width:8px;stroke-linecap:round;transition:stroke-dashoffset 1s linear}.quiz-progress-bar{background:var(--bg-card-high);border-radius:3px;height:6px;margin-bottom:20px;overflow:hidden}.quiz-progress-fill{background:var(--grad-primary);border-radius:3px;height:100%;transition:width .3s}.quiz-score-ring{font-family:var(--font-display);font-size:64px;font-weight:800;line-height:1}.card-header-flex{justify-content:space-between;align-items:center;gap:12px;margin-bottom:16px;display:flex}.custom-table-wrapper{overflow-x:auto}.custom-table{border-collapse:collapse;width:100%;font-size:14px}.custom-table th{background:var(--bg-deep);color:var(--text-muted);font-family:var(--font-label);text-transform:uppercase;letter-spacing:.06em;text-align:left;padding:10px 12px;font-size:10px;font-weight:700}.custom-table td{border-bottom:1px solid var(--border-color);padding:12px}.custom-table tbody tr:hover td{background:#c0c1ff05}.badge-cyan{color:var(--color-tertiary);background:#2fd9f41a}.glass-card{background:var(--bg-surface);border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:var(--sp-6)}.study-rating-key{opacity:.7;background:#ffffff1a;border-radius:4px;justify-content:center;align-items:center;width:16px;height:16px;margin-right:4px;font-size:10px;font-weight:700;display:inline-flex}.badge-due{background:var(--color-danger);color:#fff;min-width:18px;height:18px;font-family:var(--font-label);border-radius:9px;justify-content:center;align-items:center;padding:0 5px;font-size:10px;font-weight:700;line-height:1;display:inline-flex}