/* Study workspace follows the existing WattsUp palette. */
.wu-study-hub{margin:16px 0 22px;padding:22px}
.wu-study-heading{display:flex;align-items:start;justify-content:space-between;gap:16px}
.wu-study-heading .section-title{font-size:20px;text-wrap:balance}
.wu-study-local{color:var(--text-secondary);font-size:11px;white-space:nowrap}
.wu-study-summary{display:flex;align-items:center;justify-content:space-between;gap:18px;margin-top:20px}
.wu-study-summary>div{flex:1;min-width:0}
#wu-study-progress{font-size:13px;color:var(--text-primary)}
#wu-study-meter{display:block;width:100%;height:6px;margin-top:10px;accent-color:var(--cyan);border:0;border-radius:4px;overflow:hidden;background:var(--bg-elevated)}
#wu-study-meter::-webkit-progress-bar{background:var(--bg-elevated)}
#wu-study-meter::-webkit-progress-value{background:var(--cyan)}
.wu-study-button{padding:9px 12px;min-height:40px;border:1px solid var(--border-mid);border-radius:8px;color:var(--text-primary);font-size:12px;font-weight:600;line-height:1.4;transition:background .15s,border-color .15s;text-align:left}
.wu-study-button:hover{background:var(--bg-hover);border-color:var(--cyan)}
.wu-study-button[aria-pressed=true]{border-color:var(--cyan);color:var(--cyan);background:var(--bg-raised)}
.wu-study-primary{color:var(--cyan);max-width:52%;border-color:var(--cyan)}
.wu-study-note{font-size:12px;color:var(--text-secondary);line-height:1.6;margin-top:10px}
.wu-study-hub details{border-top:1px solid var(--border-mid);margin-top:18px;padding-top:14px}
.wu-study-hub summary{font-weight:600;font-size:14px;cursor:pointer;color:var(--text-primary);padding:4px 0;min-height:32px}
.wu-study-hub summary span{font-weight:400;font-size:12px;color:var(--text-secondary);margin-left:10px}
.wu-study-hub details[open] summary{margin-bottom:14px}
.wu-study-filters{display:flex;align-items:center;gap:6px;flex-wrap:wrap;margin:12px 0}
.wu-study-filters button{padding:7px 11px;min-height:36px;border-radius:6px;color:var(--text-secondary);border:1px solid var(--border-mid);font-size:12px}
.wu-study-filters button[aria-pressed=true]{color:var(--cyan);background:var(--bg-hover);border-color:var(--cyan)}
#wu-search-count{margin-left:auto;font-size:12px;color:var(--text-secondary)}
#wu-lesson-list{max-height:360px;overflow:auto}
.wu-lesson-link{display:grid;grid-template-columns:34px 1fr auto;gap:10px;width:100%;align-items:center;min-height:48px;text-align:left;border-top:1px solid var(--border);color:var(--text-primary);font-size:13px;padding:10px 6px}
.wu-lesson-link:hover{background:var(--bg-hover)}
.wu-lesson-number{font-family:var(--font-mono);font-size:11px;color:var(--cyan)}
.wu-lesson-status{font-size:11px;color:var(--text-secondary)}
.wu-lesson-actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:22px;padding-top:16px;border-top:1px solid var(--border-mid)}
.wu-study-lesson{scroll-margin-top:82px}
.wu-study-empty{padding:20px 0;color:var(--text-secondary);font-size:13px}
.wu-history-list{list-style:none;display:grid;gap:10px}
.wu-history-list li{padding:8px 0;border-bottom:1px solid var(--border)}
.wu-history-topics{display:flex;flex-wrap:wrap;gap:5px;margin-top:8px}
.wu-history-topics .wu-study-button{font-size:11px;padding:5px 8px;min-height:32px}
.wu-study-reset summary{font-size:12px;color:var(--text-secondary)}
.wu-study-reset .wu-study-button{margin:10px 6px 0 0}
#wu-study-reset-confirm p{font-size:13px;margin-top:12px}
.wu-sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.wu-skip-link{position:fixed;top:8px;left:8px;z-index:300;padding:12px 18px;background:var(--bg-surface);color:var(--cyan);border:2px solid var(--cyan);border-radius:8px;transform:translateY(-160%)}
.wu-skip-link:focus{transform:none}
:where(button,input,summary,a,[tabindex]):focus-visible{outline:2px solid var(--cyan);outline-offset:4px}
.toggle-pill:has(input:focus-visible){outline:2px solid var(--cyan);outline-offset:4px;border-radius:20px}
body{--text-secondary:#9aa8c1;--text-muted:#8a99b2}
body.light-mode{--text-secondary:#525d70;--text-muted:#5f6a7c}
@media(max-width:600px){.wu-study-hub{padding:18px}.wu-study-heading{display:block}.wu-study-local{display:block;margin-top:6px}.wu-study-summary{align-items:stretch;flex-direction:column;gap:12px}.wu-study-primary{max-width:100%;text-align:center}.wu-study-hub summary span{display:block;margin-left:0;margin-top:4px}.wu-lesson-link{grid-template-columns:30px 1fr;gap:6px}.wu-lesson-status{grid-column:2}.wu-study-lesson{scroll-margin-top:20px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}

#quiz-stepper{overflow-x:auto;padding:4px 0 10px}
@media(max-width:640px){.app-container{padding-bottom:100px}}