/* Page frame */
main { width: min(100%, 1560px); margin: 0 auto; padding: 24px clamp(20px, 4vw, 54px) 58px; }
.view { display: none; }
.view.active { display: block; animation: view-enter .22s ease both; }
.page-heading, .welcome-row, .session-top { display: flex; align-items: center; justify-content: space-between; gap: 22px; }
.page-heading { align-items: flex-start; margin: 0 0 22px; }
.page-heading h1, .welcome-row h1, .session-top h1 { margin: 0; font-size: clamp(26px, 3.4vw, 37px); line-height: 1.22; letter-spacing: -.045em; }
.page-heading .muted { max-width: 660px; }
.page-heading > .button { flex: 0 0 auto; margin-top: 10px; }
.study-view { width: min(100%, 1020px); margin: 0 auto; }

/* Home: one calm, central focus followed by a compact data rail. */
#homeView { padding-top: 3px; }
.home-topline { display: flex; align-items: end; justify-content: space-between; gap: 16px; margin: 0 2px 12px; }
.home-topline h1 { margin: 0; color: var(--text-muted); font-size: 16px; font-weight: 550; letter-spacing: .01em; }
.home-topline .eyebrow { margin-bottom: 3px; }
.sample-badge { display: inline-flex; align-items: center; min-height: 28px; padding: 4px 10px; border: 1px solid color-mix(in srgb, var(--gold) 38%, var(--border)); border-radius: 999px; background: color-mix(in srgb, var(--gold) 8%, var(--surface)); color: var(--text-muted); font-size: 11px; white-space: nowrap; }
.home-focus {
  position: relative;
  display: grid;
  min-height: clamp(390px, 57vh, 620px);
  place-items: center;
  isolation: isolate;
  overflow: hidden;
  border: 1px solid color-mix(in srgb, var(--gold) 19%, var(--border));
  border-radius: 20px;
  background:
    radial-gradient(ellipse at 50% 48%, color-mix(in srgb, var(--surface-elevated) 88%, var(--accent-soft)) 0%, var(--surface) 40%, color-mix(in srgb, var(--bg) 76%, var(--surface)) 100%);
  box-shadow: var(--shadow-3), inset 0 1px rgba(255,255,255,.55);
}
.home-focus::after { position: absolute; z-index: -1; inset: 14px; border: 1px solid color-mix(in srgb, var(--gold) 9%, transparent); border-radius: 14px; pointer-events: none; content: ""; }
.home-focus-halo { position: absolute; z-index: -1; width: min(76vw, 820px); aspect-ratio: 1; border-radius: 50%; background: radial-gradient(circle, color-mix(in srgb, var(--accent-soft) 44%, transparent) 0%, color-mix(in srgb, var(--surface-elevated) 18%, transparent) 44%, transparent 70%); filter: blur(10px); pointer-events: none; }
.focus-guide { position: absolute; z-index: 0; left: 50%; width: 1px; height: 26px; transform: translateX(-50%); background: linear-gradient(to bottom, transparent, color-mix(in srgb, var(--gold) 55%, transparent)); }
.focus-guide-top { top: 8%; }
.focus-guide-bottom { bottom: 8%; transform: translateX(-50%) rotate(180deg); }
.home-focus-content { position: relative; z-index: 1; display: flex; width: min(100% - 56px, 880px); flex-direction: column; align-items: center; padding: 46px 0 34px; text-align: center; }
.focus-kicker { margin: 0 0 16px; color: var(--accent); font-size: 10px; font-weight: 750; letter-spacing: .2em; }
.home-focus-term { max-width: 100%; margin: 0; font-size: clamp(46px, 7.2vw, 86px); line-height: 1.2; letter-spacing: -.055em; text-wrap: pretty; white-space: nowrap; }
.home-focus-content > .term-label { margin: -4px 0 4px; }
.home-focus-answer { min-height: 2.7em; margin: 14px 0 0; color: var(--text-muted); font-size: clamp(18px, 2vw, 23px); font-weight: 450; line-height: 1.65; white-space: pre-line; }
.focus-due { margin: 15px 0 0; color: var(--text-muted); font-size: 13px; letter-spacing: .02em; }
.focus-due strong { padding: 0 3px; color: var(--text); font-size: 19px; font-variant-numeric: tabular-nums; }
.home-focus-actions { display: flex; align-items: center; justify-content: center; gap: 9px; margin-top: 22px; }
.focus-start { min-width: 210px; }
.focus-start span, .focus-reader span { color: var(--gold-ink); font-size: 17px; }
.focus-reader { background: color-mix(in srgb, var(--surface-elevated) 87%, transparent); }
.home-session-meta { display: flex; align-items: center; justify-content: center; gap: 23px; margin-top: 21px; color: var(--text-muted); font-size: 11px; }
.home-session-meta strong { margin-left: 4px; color: var(--text); font-weight: 550; }
.home-stats { display: grid; grid-template-columns: repeat(5, minmax(0,1fr)); margin-top: 16px; overflow: hidden; border: 1px solid var(--border); border-radius: 12px; background: color-mix(in srgb, var(--surface) 90%, var(--bg)); box-shadow: var(--shadow-1); }
.stat-cell { min-width: 0; padding: 13px clamp(12px, 2vw, 23px); border-right: 1px solid var(--border); }
.stat-cell:last-child { border-right: 0; }
.stat-cell > span { display: block; overflow: hidden; color: var(--text-muted); font-size: 11px; text-overflow: ellipsis; white-space: nowrap; }
.stat-cell > strong { display: inline-block; margin-top: 2px; color: var(--text); font-size: 23px; font-weight: 650; font-variant-numeric: tabular-nums; letter-spacing: -.035em; }
.stat-cell:nth-child(3) > strong { color: var(--accent); }
.stat-cell strong small, .stat-cell > small { margin-left: 4px; color: var(--text-muted); font-size: 11px; font-weight: 500; }
.home-bottomline { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin: 12px 3px 0; }
.home-bottomline p { margin: 0; color: var(--text-muted); font-size: 11px; }
.home-bottomline p > span { color: var(--gold-ink); }
.privacy-note span { color: var(--success); font-size: 8px; vertical-align: 2px; margin-right: 5px; }

/* RSVP reader: stage stays visually dominant, configuration lives in its own panel. */
#readerView .page-heading { margin-bottom: 17px; }
#readerView .page-heading h1 { font-size: clamp(25px, 3vw, 33px); }
#readerView .eyebrow { margin-bottom: 4px; }
#readerView .page-heading .muted { margin-top: 5px; font-size: 12px; }
.reader-workspace { display: grid; grid-template-columns: minmax(0,1fr) minmax(286px,340px); align-items: start; gap: clamp(16px, 2vw, 25px); }
.reader-main { min-width: 0; }
.reader-stage {
  position: relative;
  display: flex;
  min-height: clamp(420px, 60vh, 690px);
  align-items: center;
  justify-content: center;
  overflow: hidden;
  isolation: isolate;
  border: 1px solid color-mix(in srgb, var(--gold) 18%, var(--border));
  border-radius: 18px;
  background: radial-gradient(ellipse at center, var(--surface-elevated) 0%, var(--surface) 54%, color-mix(in srgb, var(--bg) 82%, var(--surface)) 100%);
  box-shadow: var(--shadow-3), inset 0 1px rgba(255,255,255,.48);
  cursor: pointer;
  user-select: none;
}
.reader-stage::before { position: absolute; z-index: -1; inset: 12px; border: 1px solid color-mix(in srgb, var(--gold) 8%, transparent); border-radius: 12px; content: ""; pointer-events: none; }
.reader-stage::after { position: absolute; z-index: -1; width: min(90%, 720px); aspect-ratio: 1.9; border-radius: 50%; background: radial-gradient(ellipse, color-mix(in srgb, var(--accent-soft) 32%, transparent), transparent 70%); filter: blur(12px); content: ""; pointer-events: none; }
.reader-word { position: relative; z-index: 1; max-width: 100%; padding: 26px clamp(20px,4vw,54px); color: var(--text); font-size: 56px; font-weight: 720; line-height: 1.3; letter-spacing: .015em; text-align: center; word-break: keep-all; white-space: nowrap; }
.reader-word.long-chunk, .session-reader .reader-word.long-chunk { max-width: calc(100% - 28px); padding-inline: 3px; overflow-wrap: normal; word-break: keep-all; white-space: nowrap; transform-origin: center; }
.reader-word.very-long-chunk, .session-reader .reader-word.very-long-chunk { letter-spacing: 0; font-weight: 650; }
.focus-guide { position: absolute; z-index: 0; top: 11%; bottom: 11%; left: 50%; width: 1px; background: linear-gradient(to bottom, transparent, color-mix(in srgb, var(--accent) 17%, transparent) 28%, color-mix(in srgb, var(--accent) 17%, transparent) 72%, transparent); pointer-events: none; }
.reader-hint { position: absolute; right: 20px; bottom: 17px; left: 20px; z-index: 1; color: var(--text-muted); font-size: 11px; text-align: center; }
.reader-progress-row { display: flex; align-items: center; gap: 11px; margin: 12px 3px 14px; color: var(--text-muted); font-size: 10px; font-variant-numeric: tabular-nums; }
.reader-progress-row > span:first-child { min-width: 45px; }
.reader-progress-row > span:last-child { min-width: 136px; text-align: right; }
.progress-track { flex: 1; height: 3px; overflow: hidden; border-radius: 9px; background: var(--soft); }
.progress-fill { width: 0; height: 100%; border-radius: inherit; background: linear-gradient(90deg, var(--accent), var(--gold)); transition: width .15s linear; }
.reader-controls { display: flex; align-items: center; justify-content: space-between; gap: 13px; padding: 11px 3px; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.transport-controls { display: flex; align-items: center; gap: 7px; }
.transport-controls .button { min-height: 42px; padding: 8px 12px; font-size: 12px; }
.transport-controls .icon-button { width: 40px; height: 40px; font-size: 16px; }
.transport-controls .reader-play { min-width: 94px; min-height: 46px; font-size: 14px; }
.reader-shortcuts { margin: 0; color: var(--text-muted); font-size: 10px; white-space: nowrap; }
.reader-sidebar { position: sticky; top: 88px; min-width: 0; overflow: hidden; border: 1px solid var(--border); border-radius: 13px; background: var(--surface); box-shadow: var(--shadow-1); }
.reader-sidebar > summary, .session-segmentation > summary { position: relative; display: flex; min-height: 48px; align-items: center; justify-content: space-between; padding: 11px 14px; color: var(--text); font-size: 12px; font-weight: 700; cursor: pointer; list-style: none; }
.reader-sidebar > summary::-webkit-details-marker, .session-segmentation > summary::-webkit-details-marker { display: none; }
.reader-sidebar > summary::after, .session-segmentation > summary::after { color: var(--gold-ink); font-size: 16px; content: "+"; }
.reader-sidebar[open] > summary, .session-segmentation[open] > summary { border-bottom: 1px solid var(--border); }
.reader-sidebar[open] > summary::after, .session-segmentation[open] > summary::after { content: "−"; }
.reader-panel-content { padding: 0 14px 14px; }
.reader-panel-content .text-input-label { margin-top: 13px; }
.reader-panel-content textarea { min-height: 170px; resize: vertical; line-height: 1.7; font-size: 13px; }
.reader-settings { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 13px 12px; margin-top: 17px; }
.range-setting { display: block; min-width: 0; color: var(--text-muted); font-size: 11px; }
.range-setting strong { margin-left: 3px; color: var(--text); font-size: 12px; font-variant-numeric: tabular-nums; }
.range-setting input { display: block; width: 100%; margin: 8px 0 0; accent-color: var(--accent); }
.check-setting { display: flex; grid-column: 1 / -1; align-items: center; gap: 8px; color: var(--text-muted); font-size: 12px; }
.check-setting input { width: 16px; height: 16px; margin: 0; accent-color: var(--accent); }
.reader-preview { min-width: 0; margin-top: 15px; padding-top: 12px; border-top: 1px solid var(--border); }
.preview-label { display: block; color: var(--text-muted); font-size: 10px; font-weight: 700; }
.reader-preview p { margin: 4px 0 0; color: var(--text); font-size: 12px; line-height: 1.65; overflow-wrap: anywhere; }
.reader-bottom-row { display: flex; align-items: center; justify-content: space-between; gap: 9px; margin-top: 13px; }
.reader-bottom-row .muted { margin: 0; font-size: 10px; }
.reader-file-actions { display: flex; flex-wrap: wrap; gap: 6px; }
.reader-file-actions .button { min-height: 38px; padding: 6px 8px; font-size: 10px; white-space: nowrap; }
.reader-panel-content textarea.file-dragover { border: 2px dashed var(--accent); background: var(--accent-soft); }

/* Active recall cards */
.flash-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin: 13px 0; }
.flash-toolbar .muted { margin: 0; font-size: 11px; }
.flash-navigation { display: flex; gap: 7px; }
.flash-navigation .button { min-height: 39px; font-size: 11px; }
.study-card { position: relative; display: flex; min-height: min(58vh, 650px); flex-direction: column; justify-content: center; overflow: hidden; isolation: isolate; margin: 13px 0 20px; padding: clamp(28px, 5vw, 58px); border: 1px solid color-mix(in srgb, var(--gold) 14%, var(--border)); border-radius: 16px; background: radial-gradient(ellipse at 50% 23%, color-mix(in srgb, var(--surface-elevated) 76%, var(--accent-soft)), var(--surface) 60%, color-mix(in srgb, var(--bg) 78%, var(--surface))); box-shadow: var(--shadow-2); }
.study-card-top { position: absolute; top: 20px; right: 24px; left: 24px; display: flex; align-items: center; justify-content: space-between; color: var(--text-muted); font-size: 11px; }
.study-category { color: var(--accent); font-size: 11px; font-weight: 700; }
.term-heading { position: relative; z-index: 1; width: 100%; margin: 10px 0 5px; }
.term-heading .term-label { margin-bottom: 4px; }
.study-term { max-width: 100%; margin: 0; font-size: clamp(32px,5vw,52px); line-height: 1.22; letter-spacing: -.045em; white-space: nowrap; }
.study-prompt { position: relative; z-index: 1; max-width: 760px; margin: 17px 0 0; color: var(--text); font-size: clamp(17px,2.2vw,21px); line-height: 1.65; }
.reveal-area { position: relative; z-index: 1; margin-top: 23px; padding-top: 17px; border-top: 1px solid var(--border); }
.answer-label { display: block; color: var(--accent); font-size: 11px; font-weight: 750; letter-spacing: .08em; }
.answer-text { margin: 7px 0 0; color: var(--text); font-size: clamp(17px,2vw,20px); line-height: 1.8; white-space: pre-wrap; }
.study-detail { margin-top: 10px; padding: 0 13px; border: 1px solid var(--border); border-radius: 8px; background: color-mix(in srgb, var(--soft) 68%, transparent); font-size: 13px; }
.study-detail summary { min-height: 42px; padding: 10px 0; color: var(--text); font-weight: 650; cursor: pointer; }
.study-detail[open] summary { border-bottom: 1px solid var(--border); }
.study-detail p { margin: 9px 0 11px; color: var(--text-muted); line-height: 1.7; }
.answer-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-top: 14px; }
.rating-bar { position: sticky; z-index: 8; bottom: 8px; display: grid; width: min(100%, 940px); grid-template-columns: repeat(4,minmax(0,1fr)); gap: 9px; margin: 14px auto 0; padding: 8px; border: 1px solid var(--border); border-radius: 12px; background: color-mix(in srgb, var(--surface) 94%, transparent); box-shadow: var(--shadow-2); backdrop-filter: blur(14px); }
.rating-button { min-height: 58px; border: 1px solid var(--border); border-radius: 8px; background: var(--surface-elevated); color: var(--text); font-size: 13px; font-weight: 700; line-height: 1.35; transition: transform .16s ease, border-color .16s ease, background .16s ease; }
.rating-button:hover { transform: translateY(-1px); }
.rating-button small { display: block; margin-top: 2px; color: var(--text-muted); font-size: 10px; font-weight: 450; }
.rating-button[data-rating="again"] { border-color: color-mix(in srgb, var(--accent) 44%, var(--border)); color: var(--accent-strong); }
.rating-button[data-rating="hard"] { border-color: color-mix(in srgb, var(--warning) 42%, var(--border)); color: var(--warning); }
.rating-button[data-rating="remembered"] { border-color: color-mix(in srgb, var(--success) 40%, var(--border)); color: var(--success); }
.rating-button[data-rating="easy"] { border-color: color-mix(in srgb, var(--gold) 48%, var(--border)); color: var(--gold-ink); }
.empty-state { padding: 35px; border: 1px dashed var(--border); border-radius: 12px; color: var(--text-muted); text-align: center; }
.empty-state p { margin: 8px 0 0; }

/* Timed fifteen minute flow */
#sessionView { width: min(100%, 1100px); margin: 0 auto; }
.session-top { align-items: end; }
.session-top .eyebrow { margin-bottom: 4px; }
.session-clock { min-width: 112px; text-align: right; }
.session-clock span { display: block; color: var(--text-muted); font-size: 11px; }
.session-clock strong { color: var(--text); font-size: clamp(25px,3vw,32px); font-variant-numeric: tabular-nums; letter-spacing: -.04em; }
.session-track { position: relative; height: 4px; margin: 18px 0 11px; border-radius: 99px; background: var(--soft); }
.session-track > div { width: 0; height: 100%; border-radius: inherit; background: linear-gradient(90deg, var(--accent), var(--gold)); transition: width .3s linear; }
.phase-marker { position: absolute; top: -3px; width: 2px; height: 10px; border-left: 1px solid var(--border); background: var(--surface); }
.marker-one { left: 20%; }
.marker-two { left: 73.33%; }
.session-phases { display: flex; justify-content: space-between; gap: 12px; }
.phase { color: var(--text-muted); font-size: 11px; }
.phase.active { color: var(--accent); font-weight: 750; }
.phase small { display: block; font-size: 10px; font-weight: 450; }
.session-segmentation { width: min(100%, 610px); margin: 14px 0; border: 1px solid var(--border); border-radius: 10px; background: var(--surface); }
.session-segmentation[hidden] { display: none; }
.session-segmentation-controls { display: flex; align-items: end; justify-content: space-between; gap: 15px; padding: 6px 13px 13px; }
.session-segmentation .range-setting { width: min(100%, 230px); }
.session-segmentation input { display: block; width: 100%; margin-top: 8px; accent-color: var(--accent); }
.session-segmentation .button { min-height: 38px; font-size: 11px; }
.session-score { margin: 13px 0; color: var(--text-muted); font-size: 11px; font-variant-numeric: tabular-nums; }
.session-activity { min-height: 300px; }
.session-reader { position: relative; display: grid; min-height: clamp(360px,50vh,590px); place-items: center; overflow: hidden; isolation: isolate; padding: 35px; border: 1px solid color-mix(in srgb, var(--gold) 16%, var(--border)); border-radius: 16px; background: radial-gradient(ellipse at center, var(--surface-elevated), var(--surface) 58%, color-mix(in srgb, var(--bg) 84%, var(--surface))); box-shadow: var(--shadow-2); text-align: center; }
.session-reader::before { position: absolute; z-index: -1; inset: 12px; border: 1px solid color-mix(in srgb, var(--gold) 8%, transparent); border-radius: 11px; content: ""; }
.session-reader-content { display: grid; justify-items: center; gap: 8px; }
.session-reader-label { display: inline-block; color: var(--accent); font-size: 10px; font-weight: 750; letter-spacing: .15em; }
.session-reader-label[data-kind="answer"] { color: var(--text-muted); }
.session-reader-label[data-kind="pause"] { opacity: 0; }
.session-reader .reader-word { min-height: 1.35em; font-size: clamp(34px,5.5vw,56px); transition: color .18s ease, text-shadow .18s ease; }
.session-reader .reader-word[data-display-kind="term"] { color: var(--term-color); text-shadow: 0 0 18px var(--term-glow), 0 7px 26px color-mix(in srgb, var(--term-glow) 42%, transparent); font-weight: 760; }
.term-kind-fade { animation: term-kind-fade .18s ease-out both; }
@keyframes term-kind-fade { from { opacity: .68; } to { opacity: 1; } }
@media (prefers-reduced-motion: reduce) { .term-kind-fade { animation: none; } }
.session-reader .reader-hint { position: static; color: var(--text-muted); font-size: 11px; }
.session-footer { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-top: 13px; padding-top: 11px; border-top: 1px solid var(--border); }
.session-footer .muted { margin: 0; font-size: 11px; }
.session-summary { margin: 24px 0; padding: 25px; border: 1px solid var(--border); border-radius: 13px; background: var(--surface); box-shadow: var(--shadow-2); }
.session-summary h2 { margin: 0; font-size: 24px; }
.summary-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 8px; margin: 18px 0; }
.summary-stat { padding: 12px; border: 1px solid var(--border); border-radius: 8px; background: var(--soft); }
.summary-stat span { display: block; color: var(--text-muted); font-size: 10px; }
.summary-stat strong { font-size: 22px; font-variant-numeric: tabular-nums; }
.summary-weak { padding-top: 13px; border-top: 1px solid var(--border); font-size: 13px; }

/* Deck and card management */
.manage-tools { display: grid; grid-template-columns: minmax(220px,1fr) minmax(150px,205px) minmax(150px,205px); gap: 9px; }
.manage-tools input, .manage-tools select { min-height: 44px; font-size: 13px; }
.deck-admin-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-top: 13px; padding: 9px 12px; border: 1px solid var(--border); border-radius: 9px; background: var(--soft); }
.deck-admin-row p { margin: 0; color: var(--text-muted); font-size: 11px; }
.deck-admin-row .button { min-height: 38px; font-size: 11px; }
.manage-meta { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin: 15px 2px 8px; color: var(--text-muted); font-size: 10px; }
.card-list { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); align-items: stretch; gap: 10px; }
.manage-card { display: flex; min-width: 0; min-height: 158px; flex-direction: column; justify-content: space-between; gap: 12px; padding: 13px; border: 1px solid var(--border); border-radius: 10px; background: var(--surface); box-shadow: var(--shadow-1); transition: border-color .18s ease, transform .18s ease, box-shadow .18s ease; }
.manage-card:hover { transform: translateY(-1px); border-color: color-mix(in srgb, var(--gold) 38%, var(--border)); box-shadow: var(--shadow-2); }
.manage-card.is-attack { border-top: 2px solid color-mix(in srgb, var(--gold) 76%, var(--border)); }
.manage-card.is-disabled { opacity: .64; }
.manage-card-body { min-width: 0; }
.card-badges { display: flex; flex-wrap: wrap; gap: 4px; margin-bottom: 7px; }
.card-badge { display: inline-flex; max-width: 100%; align-items: center; min-height: 21px; padding: 2px 6px; overflow: hidden; border: 1px solid var(--border); border-radius: 5px; background: color-mix(in srgb, var(--soft) 76%, var(--surface)); color: var(--text-muted); font-size: 9px; text-overflow: ellipsis; white-space: nowrap; }
.attack-badge { border-color: color-mix(in srgb, var(--gold) 54%, var(--border)); color: var(--gold-ink); }
.priority-badge { border-color: color-mix(in srgb, var(--accent) 23%, var(--border)); color: var(--accent); }
.disabled-badge { color: var(--text-muted); }
.manage-term { max-width: 100%; margin: 0; font-size: 15px; letter-spacing: -.02em; white-space: nowrap; }
.manage-card p { display: -webkit-box; margin: 4px 0 0; overflow: hidden; color: var(--text-muted); font-size: 11px; line-height: 1.55; -webkit-box-orient: vertical; -webkit-line-clamp: 3; }
.card-sources { margin-top: 9px; color: var(--text-muted); font-size: 10px; }
.card-sources summary { min-height: 32px; padding: 6px 1px; color: var(--text-muted); cursor: pointer; }
.card-sources ul { display: grid; gap: 4px; margin: 0 0 5px; padding-left: 18px; overflow-wrap: anywhere; }
.card-sources a, .materials-links a { min-height: 28px; color: var(--accent-strong); text-decoration-thickness: 1px; text-underline-offset: 2px; }
.card-sources p { font-size: 10px; }
.term-editor-preview { min-width: 0; width: 100%; box-sizing: border-box; padding: 10px 12px; border: 1px solid var(--border); border-radius: 9px; background: var(--surface); }
.term-editor-preview .term-label { margin-bottom: 5px; }
.term-editor-preview p { max-width: 100%; margin: 0; font-size: 28px; line-height: 1.3; white-space: nowrap; }
.materials-about { margin: 15px 3px 0; color: var(--text-muted); font-size: 12px; }
.materials-about > summary { display: inline-flex; min-height: 40px; align-items: center; color: var(--text-muted); cursor: pointer; }
.materials-about-content { max-width: 960px; padding: 10px 14px; border: 1px solid var(--border); border-radius: 10px; background: var(--surface); }
.materials-about-content p { margin: 6px 0; line-height: 1.7; }
.materials-links { display: flex; flex-wrap: wrap; gap: 8px 20px; margin: 9px 0 4px; padding-left: 18px; }
.manage-card-actions { display: flex; justify-content: flex-end; }
.manage-card-actions .button { min-height: 36px; padding: 6px 12px; font-size: 11px; }
.data-tools { display: flex; align-items: flex-start; justify-content: space-between; gap: 20px; margin-top: 25px; padding: 17px; border: 1px solid var(--border); border-radius: 10px; background: color-mix(in srgb, var(--surface) 88%, var(--bg)); }
.data-tools h2 { margin: 0; font-size: 14px; }
.data-tools p { margin: 4px 0 0; color: var(--text-muted); font-size: 11px; }
.data-buttons { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 7px; }
.data-buttons .button { min-height: 38px; padding: 7px 10px; font-size: 10px; }

/* Fullscreen reader dims controls until interaction brings them back. */
body.reader-fullscreen { overflow: hidden; background: var(--bg); }
body.reader-fullscreen .app-header, body.reader-fullscreen .mobile-nav,
body.reader-fullscreen #readerView > .page-heading, body.reader-fullscreen .reader-sidebar { display: none !important; }
body.reader-fullscreen main { width: 100%; max-width: none; height: 100dvh; padding: 0; }
body.reader-fullscreen #readerView { height: 100%; }
body.reader-fullscreen .reader-workspace { display: block; height: 100%; }
body.reader-fullscreen .reader-main { display: flex; height: 100%; flex-direction: column; justify-content: center; padding: 24px clamp(18px,4vw,70px); }
body.reader-fullscreen .reader-stage { min-height: 0; height: min(78dvh, 900px); flex: 1; }
body.reader-fullscreen .reader-controls, body.reader-fullscreen .reader-progress-row { transition: opacity .24s ease; }
body.reader-fullscreen.reader-controls-dim .reader-controls, body.reader-fullscreen.reader-controls-dim .reader-progress-row { opacity: .15; }
body.reader-fullscreen.reader-controls-dim .reader-controls:hover, body.reader-fullscreen.reader-controls-dim .reader-controls:focus-within,
body.reader-fullscreen.reader-controls-dim .reader-progress-row:hover { opacity: 1; }

@keyframes view-enter { from { opacity: .78; } to { opacity: 1; } }

/* Tablet / phone */
@media (max-width: 1100px) {
  .main-nav { gap: 1px; }
  .nav-button { padding-inline: 9px; font-size: 12px; }
  .reader-workspace { grid-template-columns: minmax(0,1fr) minmax(260px,310px); gap: 15px; }
  .reader-shortcuts { display: none; }
  .card-list { grid-template-columns: repeat(2,minmax(0,1fr)); }
}

@media (max-width: 760px) {
  .app-header { position: sticky; min-height: 61px; gap: 8px; padding: 8px 15px; }
  .brand { gap: 9px; }
  .brand-mark { width: 38px; height: 38px; border-radius: 11px; }
  .brand strong { font-size: 14px; }
  .brand small { max-width: 150px; overflow: hidden; font-size: 10px; text-overflow: ellipsis; white-space: nowrap; }
  .main-nav { display: none; }
  .appearance-control > summary { min-width: 52px; min-height: 40px; padding-inline: 9px; font-size: 11px; }
  .mobile-nav { position: fixed; z-index: 20; right: 0; bottom: 0; left: 0; display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); min-height: calc(63px + env(safe-area-inset-bottom)); padding: 4px 8px calc(4px + env(safe-area-inset-bottom)); border-top: 1px solid var(--border); background: color-mix(in srgb, var(--surface) 94%, transparent); box-shadow: 0 -8px 26px rgba(30,25,20,.06); backdrop-filter: blur(18px) saturate(130%); }
  .mobile-nav-button { display: flex; min-width: 44px; min-height: 51px; flex-direction: column; align-items: center; justify-content: center; gap: 1px; border: 0; border-radius: 8px; background: transparent; color: var(--text-muted); font-size: 10px; line-height: 1.2; }
  .mobile-nav-button > span:first-child { color: currentColor; font-size: 17px; line-height: 1.15; }
  .mobile-nav-button.active { color: var(--accent-strong); background: var(--accent-soft); font-weight: 700; }
  .mobile-nav-button.active > span:first-child { color: var(--gold-ink); }
  main { padding: 17px 15px calc(90px + env(safe-area-inset-bottom)); }
  .page-heading { gap: 9px; margin-bottom: 16px; }
  .page-heading h1, .welcome-row h1 { font-size: 26px; }
  .page-heading .muted { max-width: 270px; font-size: 12px; }
  .page-heading > .button { min-height: 40px; margin-top: 7px; padding: 7px 9px; font-size: 11px; }
  .home-topline { margin-bottom: 10px; }
  .home-topline .eyebrow { font-size: 9px; }
  .home-topline h1 { font-size: 14px; }
  .sample-badge { min-height: 26px; padding-inline: 8px; font-size: 10px; }
  .home-focus { min-height: clamp(420px,57svh,520px); border-radius: 15px; }
  .home-focus::after { inset: 9px; border-radius: 11px; }
  .home-focus-content { width: calc(100% - 36px); padding: 39px 0 29px; }
  .focus-kicker { margin-bottom: 11px; font-size: 9px; }
  .home-focus-term { font-size: clamp(42px,11vw,64px); }
  .home-focus-answer { min-height: 2.5em; margin-top: 10px; font-size: clamp(16px,4.7vw,19px); }
  .focus-due { margin-top: 9px; font-size: 12px; }
  .focus-due strong { font-size: 17px; }
  .home-focus-actions { width: 100%; flex-direction: column; gap: 7px; margin-top: 15px; }
  .home-focus-actions .button { width: min(100%,280px); min-height: 46px; }
  .home-focus-actions .focus-reader { min-height: 42px; }
  .home-session-meta { flex-wrap: wrap; gap: 5px 14px; margin-top: 13px; font-size: 10px; }
  .home-stats { grid-template-columns: repeat(2,minmax(0,1fr)); margin-top: 12px; }
  .stat-cell { padding: 10px 13px; border-right: 1px solid var(--border); border-bottom: 1px solid var(--border); }
  .stat-cell:nth-child(2n) { border-right: 0; }
  .stat-cell:last-child { border-bottom: 0; }
  .stat-cell:nth-child(5) { grid-column: 1 / -1; border-right: 0; }
  .stat-cell > span { font-size: 10px; }
  .stat-cell > strong { font-size: 20px; }
  .home-bottomline { display: block; margin-top: 10px; }
  .home-bottomline p { font-size: 10px; }
  .home-bottomline p + p { margin-top: 5px; }

  .reader-workspace { display: flex; flex-direction: column; gap: 12px; }
  .reader-main { order: 0; width: 100%; }
  .reader-sidebar { position: static; order: 1; width: 100%; }
  .reader-sidebar:not([open]) { box-shadow: none; }
  .reader-sidebar > summary { min-height: 46px; }
  .reader-panel-content { padding: 0 12px 13px; }
  .reader-panel-content textarea { min-height: 135px; font-size: 16px; }
  .reader-stage { min-height: clamp(360px,53svh,500px); border-radius: 14px; }
  .reader-stage::before { inset: 8px; }
  .reader-word { padding: 20px 18px; font-size: clamp(38px,11vw,56px); }
  .reader-hint { bottom: 14px; font-size: 10px; }
  .reader-progress-row { flex-wrap: wrap; gap: 7px; margin: 9px 2px 8px; font-size: 10px; }
  .reader-progress-row .progress-track { order: 3; flex-basis: 100%; }
  .reader-progress-row > span:last-child { flex: 1; text-align: right; }
  .reader-controls { position: sticky; z-index: 5; bottom: calc(65px + env(safe-area-inset-bottom)); display: block; padding: 9px 6px; border: 1px solid var(--border); border-radius: 11px; background: color-mix(in srgb, var(--surface) 92%, transparent); box-shadow: var(--shadow-2); backdrop-filter: blur(14px); }
  .transport-controls { display: grid; grid-template-columns: 42px minmax(68px,1fr) 42px minmax(67px,1fr) minmax(58px,1fr); gap: 5px; }
  .transport-controls .button { min-height: 42px; padding: 7px 5px; font-size: 10px; }
  .transport-controls .icon-button { width: 42px; height: 42px; }
  .transport-controls .reader-play { min-width: 0; font-size: 12px; }
  .reader-shortcuts { display: block; margin-top: 5px; font-size: 9px; text-align: center; }
  .reader-settings { gap: 12px 10px; }
  .range-setting { font-size: 11px; }
  .range-setting input { width: 100%; }
  .reader-preview p { font-size: 12px; }
  .reader-bottom-row { align-items: flex-start; flex-direction: column; }
  .reader-file-actions { width: 100%; }
  .reader-file-actions .button { flex: 1; white-space: normal; }

  .flash-toolbar { align-items: flex-start; flex-direction: column; gap: 7px; }
  .study-card { min-height: 46svh; margin: 10px 0 14px; padding: 61px 20px 22px; border-radius: 13px; }
  .study-card-top { top: 15px; right: 18px; left: 18px; }
  .study-term { font-size: clamp(30px,8.5vw,40px); }
  .study-prompt, .answer-text { font-size: 17px; }
  .study-detail { font-size: 12px; }
  .rating-bar { position: fixed; right: 9px; bottom: calc(65px + env(safe-area-inset-bottom)); left: 9px; width: auto; gap: 5px; margin: 0; padding: 6px; border-radius: 10px; }
  .rating-button { min-height: 54px; padding: 5px 1px; font-size: 11px; }
  .rating-button small { font-size: 9px; }
  #flashView { padding-bottom: 175px; }
  #sessionView { padding-bottom: 10px; }
  .session-top { align-items: center; }
  .session-top h1 { font-size: 25px; }
  .session-clock { min-width: 90px; }
  .session-clock strong { font-size: 25px; }
  .session-phases { gap: 6px; }
  .phase { flex: 1; font-size: 10px; line-height: 1.4; }
  .phase small { font-size: 9px; }
  .session-segmentation { margin-block: 12px; }
  .session-segmentation-controls { gap: 9px; padding-inline: 10px; }
  .session-segmentation-controls .button { padding-inline: 9px; white-space: nowrap; }
  .session-activity { min-height: 250px; }
  .session-reader { min-height: clamp(330px,48svh,450px); padding: 25px 14px; }
  .session-reader .reader-word { font-size: clamp(30px,8vw,42px); }
  .session-footer { align-items: flex-start; }
  .session-footer .muted { max-width: 65%; font-size: 10px; }
  .summary-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }

  .manage-tools { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .manage-tools .search-field { grid-column: 1 / -1; }
  .deck-admin-row { align-items: stretch; flex-direction: column; }
  .deck-admin-row .button { width: 100%; }
  .manage-meta { font-size: 10px; }
  .card-list { grid-template-columns: 1fr; }
  .manage-card { min-height: 130px; }
  .data-tools { display: block; padding: 14px; }
  .data-buttons { justify-content: flex-start; margin-top: 12px; }
  .data-buttons .button { flex: 1 1 42%; font-size: 10px; }
  .form-grid { grid-template-columns: minmax(0, 1fr); gap: 10px; }
  .full-field { grid-column: auto; }
  .card-dialog form { padding: 17px; }
  .dialog-actions { flex-wrap: wrap; }
}

@media (max-width: 380px) {
  .app-header { padding-inline: 11px; }
  .brand { gap: 7px; }
  .brand small { max-width: 154px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .appearance-menu { right: -2px; }
  main { padding-inline: 11px; }
  .mobile-nav { padding-inline: 5px; }
  .mobile-nav-button { font-size: 10px; }
  .home-focus-content { width: calc(100% - 28px); }
  .home-session-meta { column-gap: 9px; }
  .reader-controls { padding-inline: 4px; }
  .transport-controls { grid-template-columns: 38px minmax(55px,1fr) 38px minmax(60px,1fr) minmax(53px,1fr); gap: 4px; }
  .transport-controls .icon-button { width: 38px; height: 40px; }
  .transport-controls .button { font-size: 9px; }
  .manage-tools { grid-template-columns: 1fr; }
  .manage-tools .search-field { grid-column: auto; }
  .session-segmentation-controls { align-items: stretch; flex-direction: column; }
  .session-segmentation .range-setting { width: 100%; }
  .session-segmentation-controls .button { align-self: flex-start; }
}