:root {
  color-scheme: light;
  --canvas: #f4f6f0;
  --surface: #fffefa;
  --surface-soft: #f8faf5;
  --ink: #19342e;
  --ink-soft: #3d5c50;
  --muted: #6c7d74;
  --line: #d9e4db;
  --line-strong: #bfd0c5;
  --green: #18694e;
  --green-deep: #103d31;
  --green-soft: #eaf3eb;
  --gold: #c5974a;
  --gold-soft: #f4e8cc;
  --error: #a34438;
  --error-soft: #fff3ef;
  --shadow: 0 18px 46px rgba(25, 52, 46, .08);
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background: var(--canvas);
  scroll-behavior: smooth;
}

body {
  min-width: 280px;
  min-height: 100vh;
  margin: 0;
  background:
    radial-gradient(circle at 90% 2%, rgba(197, 151, 74, .12) 0 2px, transparent 2.5px) 0 0 / 26px 26px,
    linear-gradient(180deg, #f8f8f2 0%, var(--canvas) 100%);
  color: var(--ink);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "PingFang TC", "Noto Sans CJK TC", sans-serif;
  line-height: 1.5;
}

a {
  color: inherit;
}

button,
input {
  font: inherit;
}

button,
a,
input {
  -webkit-tap-highlight-color: transparent;
}

button {
  cursor: pointer;
}

button:disabled {
  cursor: default;
  opacity: .42;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
.caption-pane:focus-visible,
summary:focus-visible {
  outline: 3px solid rgba(197, 151, 74, .48);
  outline-offset: 3px;
}

[hidden] {
  display: none !important;
}

.skip-link {
  position: fixed;
  z-index: 10;
  top: 10px;
  left: 10px;
  padding: 9px 13px;
  border-radius: 10px;
  background: var(--green-deep);
  color: #fffdf8;
  transform: translateY(-160%);
  transition: transform .18s ease;
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  z-index: 5;
  top: 0;
  border-bottom: 1px solid rgba(217, 228, 219, .86);
  background: rgba(248, 248, 242, .88);
  backdrop-filter: blur(16px);
}

.site-header__inner,
.app-shell,
.site-footer {
  width: min(100% - 36px, 1060px);
  margin: 0 auto;
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  min-height: 76px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  min-width: 0;
  color: var(--green-deep);
  text-decoration: none;
}

.brand__icon {
  display: block;
  width: 43px;
  height: 43px;
  flex: 0 0 43px;
  border-radius: 13px;
  object-fit: contain;
  box-shadow: 0 8px 18px rgba(16, 61, 49, .15);
}

.brand__copy {
  display: grid;
  gap: 1px;
  min-width: 0;
}

.brand__eyebrow,
.eyebrow {
  color: var(--muted);
  font-size: .69rem;
  font-weight: 800;
  letter-spacing: .16em;
  line-height: 1.25;
}

.brand__title {
  overflow: hidden;
  font-size: 1.02rem;
  font-weight: 750;
  letter-spacing: -.025em;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.auth-controls {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
}

.script-toggle {
  display: inline-flex;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  background: rgba(255, 254, 250, .72);
}

.script-toggle button {
  min-height: 36px;
  padding: 6px 11px;
  border: 0;
  border-left: 1px solid var(--line-strong);
  background: transparent;
  color: var(--muted);
  font-size: .8rem;
  font-weight: 750;
}

.script-toggle button:first-child {
  border-left: 0;
}

.script-toggle button[aria-pressed="true"] {
  background: var(--green);
  color: #fffefa;
}

.app-shell {
  min-height: calc(100vh - 140px);
  padding: 38px 0 78px;
}

.message {
  margin: 0;
  line-height: 1.55;
  overflow-wrap: anywhere;
}

.message--error {
  padding: 12px 15px;
  border: 1px solid rgba(163, 68, 56, .25);
  border-radius: 13px;
  background: var(--error-soft);
  color: var(--error);
  font-size: .9rem;
}

#globalError {
  margin-bottom: 20px;
}

.loading-panel {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 11px;
  min-height: 180px;
  margin: 12vh auto 0;
  color: var(--muted);
}

.loading-panel p {
  margin: 0;
}

.loading-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 5px rgba(197, 151, 74, .14);
}

.auth-panel {
  position: relative;
  max-width: 520px;
  margin: 8vh auto 0;
  padding: 36px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 27px;
  background: rgba(255, 254, 250, .93);
  box-shadow: var(--shadow);
}

.auth-panel::after {
  position: absolute;
  right: -42px;
  bottom: -56px;
  width: 190px;
  height: 190px;
  border: 1px solid rgba(197, 151, 74, .22);
  border-radius: 50%;
  content: "";
}

.auth-panel__art {
  position: relative;
  width: 74px;
  height: 58px;
  margin-bottom: 23px;
}

.art-sun {
  position: absolute;
  top: 0;
  left: 4px;
  width: 31px;
  height: 31px;
  border: 2px solid var(--green-deep);
  border-radius: 50%;
  background: #ffd963;
}

.art-sun::after {
  position: absolute;
  top: 9px;
  left: 8px;
  width: 10px;
  height: 5px;
  border-bottom: 2px solid var(--green-deep);
  border-radius: 50%;
  content: "";
}

.art-page {
  position: absolute;
  right: 0;
  width: 48px;
  height: 29px;
  border: 2px solid var(--green);
  border-radius: 7px;
  background: var(--green-soft);
}

.art-page::before,
.art-page::after {
  position: absolute;
  left: 8px;
  width: 27px;
  height: 3px;
  border-radius: 4px;
  background: var(--green);
  content: "";
}

.art-page::before {
  top: 8px;
}

.art-page::after {
  top: 16px;
  width: 19px;
  background: var(--gold);
}

.art-page--one {
  top: 5px;
  transform: rotate(7deg);
}

.art-page--two {
  top: 22px;
  right: 8px;
  transform: rotate(-6deg);
}

.auth-panel h1,
.page-heading h1,
.replay-heading h1 {
  margin: 8px 0 0;
  color: var(--green-deep);
  font-size: clamp(2rem, 5vw, 3.45rem);
  font-weight: 780;
  letter-spacing: -.065em;
  line-height: 1.08;
}

.auth-panel__lead,
.page-heading__lead {
  max-width: 590px;
  margin: 16px 0 0;
  color: var(--ink-soft);
  line-height: 1.75;
}

.login-form {
  position: relative;
  z-index: 1;
  margin-top: 27px;
}

.login-form label,
.date-filter label {
  display: block;
  margin-bottom: 8px;
  color: var(--ink);
  font-size: .82rem;
  font-weight: 760;
}

.password-field {
  display: flex;
  gap: 9px;
}

input[type="password"],
input[type="date"] {
  min-width: 0;
  min-height: 44px;
  padding: 9px 12px;
  border: 1px solid var(--line-strong);
  border-radius: 11px;
  background: var(--surface);
  color: var(--ink);
}

.password-field input {
  flex: 1 1 auto;
  width: 100%;
  font-size: 1rem;
}

.button {
  min-height: 42px;
  padding: 9px 14px;
  border: 1px solid var(--line-strong);
  border-radius: 11px;
  background: var(--surface);
  color: var(--ink);
  font-size: .86rem;
  font-weight: 720;
  transition: background .18s ease, border-color .18s ease, box-shadow .18s ease, transform .18s ease;
}

.button:hover:not(:disabled) {
  border-color: var(--green);
  box-shadow: 0 6px 15px rgba(25, 52, 46, .09);
  transform: translateY(-1px);
}

.button--primary {
  border-color: var(--green);
  background: var(--green);
  color: #fffefa;
  box-shadow: 0 8px 18px rgba(24, 105, 78, .17);
}

.button--quiet {
  background: rgba(255, 254, 250, .72);
}

.button--small {
  min-height: 34px;
  padding: 5px 9px;
  font-size: .78rem;
}

.login-form .message {
  margin-top: 13px;
}

.page-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 30px;
  margin-bottom: 27px;
}

.date-filter {
  flex: 0 0 245px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(255, 254, 250, .66);
}

.date-filter__controls {
  display: flex;
  gap: 8px;
}

.date-filter input {
  width: 100%;
}

.date-filter .button {
  flex: 0 0 auto;
  min-height: 44px;
}

.status-line {
  min-height: 22px;
  margin: 0 0 13px;
  color: var(--muted);
  font-size: .82rem;
}

.catalog-list {
  display: grid;
  gap: 27px;
}

.day-group {
  display: grid;
  gap: 11px;
}

.day-group__heading {
  display: flex;
  align-items: baseline;
  gap: 11px;
  margin: 0;
  color: var(--green-deep);
  font-size: 1rem;
  font-weight: 780;
  letter-spacing: -.02em;
}

.day-group__count {
  color: var(--muted);
  font-size: .76rem;
  font-weight: 600;
}

.class-card {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr) auto;
  align-items: center;
  gap: 18px;
  width: 100%;
  padding: 19px 21px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 254, 250, .94);
  color: var(--ink);
  text-align: left;
  box-shadow: 0 7px 22px rgba(25, 52, 46, .035);
  transition: border-color .18s ease, box-shadow .18s ease, transform .18s ease;
}

.class-card:hover {
  border-color: rgba(24, 105, 78, .45);
  box-shadow: 0 12px 27px rgba(25, 52, 46, .09);
  transform: translateY(-2px);
}

.class-card__time {
  color: var(--green);
  font-size: 1.08rem;
  font-weight: 800;
  letter-spacing: -.03em;
}

.class-card__content {
  min-width: 0;
}

.class-card__title {
  margin: 0;
  overflow: hidden;
  color: var(--green-deep);
  font-size: 1.03rem;
  font-weight: 760;
  letter-spacing: -.02em;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.class-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 5px 13px;
  margin: 6px 0 0;
  color: var(--muted);
  font-size: .78rem;
}

.class-card__action {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--green);
  font-size: .8rem;
  font-weight: 800;
  white-space: nowrap;
}

.class-card__action::after {
  content: "→";
  font-size: 1.05rem;
  line-height: 1;
}

.empty-state {
  margin: 25px 0 0;
  padding: 28px 20px;
  border: 1px dashed var(--line-strong);
  border-radius: 16px;
  color: var(--muted);
  text-align: center;
}

.empty-state--compact {
  margin: 13px 0 0;
  padding: 14px 15px;
  border-style: solid;
  font-size: .85rem;
  text-align: left;
}

.back-button {
  margin: 0 0 22px;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--green);
  font-size: .86rem;
  font-weight: 760;
}

.back-button:hover {
  color: var(--green-deep);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.replay-heading {
  margin-bottom: 24px;
}

.replay-heading h1 {
  max-width: 820px;
  overflow-wrap: anywhere;
}

.replay-heading__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 5px 14px;
  margin: 12px 0 0;
  color: var(--muted);
  font-size: .84rem;
}

#replayLoading {
  min-height: 160px;
  margin: 0;
}

#replayBody {
  display: grid;
  gap: 19px;
}

.player-card,
.transcript-card,
.downloads-card {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: rgba(255, 254, 250, .95);
  box-shadow: 0 10px 30px rgba(25, 52, 46, .045);
}

.player-card {
  border-color: var(--green-deep);
  background: linear-gradient(145deg, #164d3d 0%, var(--green-deep) 100%);
  color: #fffefa;
  box-shadow: 0 17px 38px rgba(16, 61, 49, .18);
}

.section-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 18px;
}

.section-heading .eyebrow {
  color: var(--gold);
}

.section-heading h2 {
  margin: 5px 0 0;
  color: var(--green-deep);
  font-size: 1.35rem;
  font-weight: 780;
  letter-spacing: -.035em;
  line-height: 1.2;
}

.player-card .section-heading h2 {
  color: #fffefa;
}

.section-heading__note {
  margin: 7px 0 0;
  color: var(--muted);
  font-size: .8rem;
  line-height: 1.55;
}

.player-time {
  flex: 0 0 auto;
  padding-top: 4px;
  color: rgba(255, 254, 250, .72);
  font: 700 .78rem/1.3 ui-monospace, SFMono-Regular, Menlo, monospace;
  white-space: nowrap;
}

audio {
  display: block;
  width: 100%;
  min-height: 42px;
}

.playback-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-top: 17px;
  padding-top: 15px;
  border-top: 1px solid rgba(255, 254, 250, .16);
}

.speed-control,
.seek-control,
.follow-control {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: rgba(255, 254, 250, .84);
  font-size: .8rem;
}

.seek-control .button {
  border-color: rgba(255, 254, 250, .27);
  background: rgba(255, 254, 250, .09);
  color: #fffefa;
}

.seek-control .button:hover:not(:disabled) {
  border-color: rgba(255, 254, 250, .7);
  background: rgba(255, 254, 250, .17);
}

.speed-control .button {
  border-color: rgba(255, 254, 250, .27);
  background: rgba(255, 254, 250, .09);
  color: #fffefa;
}

.speed-control .button:hover:not(:disabled) {
  border-color: rgba(255, 254, 250, .7);
  background: rgba(255, 254, 250, .17);
}

.control-label {
  color: rgba(255, 254, 250, .6);
}

.speed-value {
  min-width: 42px;
  color: #f1cf8b;
  font-weight: 800;
  text-align: center;
}

.follow-control {
  cursor: pointer;
  user-select: none;
}

.follow-control input {
  width: 18px;
  height: 18px;
  margin: 0;
  accent-color: #e0b96f;
}

.transcript-card {
  min-width: 0;
}

.caption-pane {
  max-height: min(65vh, 720px);
  overflow: auto;
  padding: 4px 5px 4px 0;
  overscroll-behavior: contain;
  scroll-behavior: smooth;
}

.caption-row {
  display: grid;
  grid-template-columns: 67px minmax(0, 1fr);
  gap: 13px;
  width: 100%;
  padding: 15px 13px;
  border: 0;
  border-bottom: 1px solid #e8eee8;
  border-radius: 10px;
  background: transparent;
  color: var(--ink);
  text-align: left;
  line-height: 1.7;
  transition: background .18s ease, box-shadow .18s ease, color .18s ease;
}

.caption-row:hover {
  background: var(--surface-soft);
}

.caption-row.is-active {
  background: var(--gold-soft);
  box-shadow: inset 4px 0 0 var(--gold);
  color: var(--green-deep);
}

.caption-row__time {
  padding-top: 3px;
  color: var(--muted);
  font: 700 .72rem/1.4 ui-monospace, SFMono-Regular, Menlo, monospace;
  white-space: nowrap;
}

.caption-row.is-active .caption-row__time {
  color: #7b5d29;
}

.caption-row__text {
  overflow-wrap: anywhere;
  white-space: pre-wrap;
}

.caption-gap {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 14px 0 3px;
  color: #8b6b31;
  font-size: .74rem;
  font-weight: 780;
  letter-spacing: .02em;
}

.caption-gap::before,
.caption-gap::after {
  height: 1px;
  flex: 1 1 auto;
  background: var(--gold-soft);
  content: "";
}

.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 13px;
  margin-top: 20px;
}

.page-status {
  min-width: 72px;
  color: var(--muted);
  font-size: .78rem;
  text-align: center;
}

.download-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.download-link {
  display: grid;
  gap: 6px;
  min-width: 0;
  padding: 14px 15px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface-soft);
  color: var(--green-deep);
  text-decoration: none;
  transition: border-color .18s ease, background .18s ease, transform .18s ease;
}

.download-link:hover {
  border-color: rgba(24, 105, 78, .45);
  background: var(--green-soft);
  transform: translateY(-1px);
}

.download-link__label {
  font-size: .86rem;
  font-weight: 780;
}

.download-link__filename {
  overflow: hidden;
  color: var(--muted);
  font-size: .72rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.advanced-downloads {
  margin-top: 22px;
  border-top: 1px solid var(--line);
}

.advanced-downloads summary {
  padding: 17px 0 4px;
  color: var(--green-deep);
  cursor: pointer;
  font-size: .88rem;
  font-weight: 780;
  list-style: none;
}

.advanced-downloads summary::-webkit-details-marker {
  display: none;
}

.advanced-downloads summary::after {
  float: right;
  color: var(--gold);
  content: "+";
  font-size: 1.1rem;
  font-weight: 500;
}

.advanced-downloads[open] summary::after {
  content: "−";
}

.advanced-downloads .section-heading__note {
  margin: 4px 0 12px;
}

.part-download-list {
  display: grid;
  gap: 8px;
}

.part-download-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 11px 13px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface-soft);
}

.part-download-info {
  display: grid;
  min-width: 0;
  gap: 2px;
}

.part-download-label {
  color: var(--green-deep);
  font-size: .82rem;
  font-weight: 750;
}

.part-download-filename {
  overflow: hidden;
  color: var(--muted);
  font-size: .71rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.part-download-row .button {
  flex: 0 0 auto;
  min-height: 35px;
  padding: 6px 10px;
  color: var(--green);
  text-decoration: none;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 15px;
  padding: 0 0 27px;
  color: var(--muted);
  font-size: .69rem;
  font-weight: 750;
  letter-spacing: .12em;
}

@media (max-width: 760px) {
  .site-header__inner,
  .app-shell,
  .site-footer {
    width: min(100% - 30px, 620px);
  }

  .site-header__inner {
    min-height: 68px;
  }

  .app-shell {
    padding-top: 27px;
  }

  .page-heading {
    display: block;
  }

  .date-filter {
    max-width: 360px;
    margin-top: 21px;
  }

  .class-card {
    grid-template-columns: 61px minmax(0, 1fr);
    gap: 12px;
    padding: 17px;
  }

  .class-card__action {
    grid-column: 2;
    justify-self: start;
    margin-top: -3px;
  }

  .download-grid {
    grid-template-columns: 1fr;
  }

  .playback-controls {
    align-items: flex-start;
    flex-direction: column;
    gap: 13px;
  }
}

@media (max-width: 520px) {
  .auth-controls {
    gap: 6px;
  }

  .auth-controls .button--quiet {
    padding-inline: 9px;
  }

  .brand__eyebrow {
    font-size: .61rem;
  }

  .brand__title {
    font-size: .93rem;
  }

  .brand__icon {
    width: 38px;
    height: 38px;
    flex-basis: 38px;
  }

  .auth-panel,
  .player-card,
  .transcript-card,
  .downloads-card {
    padding: 19px;
    border-radius: 19px;
  }

  .auth-panel {
    margin-top: 4vh;
  }

  .auth-panel h1,
  .page-heading h1,
  .replay-heading h1 {
    font-size: clamp(1.95rem, 10vw, 2.65rem);
  }

  .password-field {
    display: grid;
    grid-template-columns: 1fr;
  }

  .password-field .button {
    width: 100%;
  }

  .section-heading {
    gap: 10px;
  }

  .player-time {
    font-size: .68rem;
  }

  .caption-row {
    grid-template-columns: 56px minmax(0, 1fr);
    gap: 9px;
    padding: 13px 10px;
  }

  .caption-row__time {
    font-size: .65rem;
  }

  .part-download-row {
    align-items: flex-start;
    flex-direction: column;
    gap: 9px;
  }

  .part-download-row .button {
    width: 100%;
    text-align: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: .01ms !important;
  }
}