/* Curriculum — teacher workspace */

:root {
  --bg: #f8fafc;
  --surface: #ffffff;
  --text: #1f2937;
  --sub: #64748b;
  --line: #e2e8f0;
  --accent: #0f766e;
  --google-blue: #1a73e8;
  --shadow: 0 1px 2px rgba(15, 23, 42, 0.06), 0 8px 24px rgba(15, 23, 42, 0.06);
}

* { box-sizing: border-box }

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Google Sans", "Product Sans", ui-sans-serif, system-ui, -apple-system,
    "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background:
    radial-gradient(900px 420px at 10% -10%, #dbeafe 0%, transparent 55%),
    radial-gradient(700px 380px at 100% 0%, #ccfbf1 0%, transparent 50%),
    var(--bg);
  color: var(--text);
  line-height: 1.55
}

a { color: var(--accent); text-decoration: none }
a:hover { text-decoration: underline }

.top {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  padding: .9rem 1.25rem;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.86);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 20
}

.brand {
  display: flex;
  align-items: center;
  gap: .7rem;
  color: var(--text);
  font-weight: 600;
  text-decoration: none
}

.top nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-left: auto;
  align-items: center;
  font-size: .95rem
}

.top nav a,
.top nav button[data-odc-share] {
  color: var(--sub);
  background: transparent;
  border: 0;
  padding: 0;
  font: inherit;
  cursor: pointer
}

.top nav a:hover,
.top nav button[data-odc-share]:hover { color: var(--text) }

main {
  max-width: 72rem;
  margin: 0 auto;
  padding: 1rem 1rem 4rem
}

.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 1.5rem;
  box-shadow: var(--shadow)
}

.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
}

.kicker {
  margin: 0 0 .35rem;
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--google-blue)
}

h1 {
  margin: 0 0 .75rem;
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  line-height: 1.15;
  letter-spacing: -.02em
}

h2 {
  margin: 0;
  font-size: 1rem;
  font-weight: 600
}

h3 {
  margin: 0 0 .75rem;
  font-size: 1rem;
  color: var(--sub);
  font-weight: 600
}

.lede {
  margin: 0 0 1.5rem;
  color: var(--sub);
  font-size: 1.05rem
}

.google-btn {
  display: inline-flex;
  align-items: center;
  gap: .65rem;
  padding: .7rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: #1f1f1f;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.06)
}

.google-btn:hover { background: #f8fafc }
.google-btn:disabled { opacity: .6; cursor: wait }

.error {
  margin: .85rem 0 0;
  color: #b91c1c;
  font-size: .92rem
}

.studio-bar { padding: 1rem 1.25rem; margin-bottom: 1rem }

.user-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .75rem
}

.user-row.compact { margin: 0 }

.user-row img {
  width: 40px;
  height: 40px;
  border-radius: 999px;
  object-fit: cover;
  background: var(--line)
}

.user-name { margin: 0; font-weight: 600; font-size: .95rem }
.user-meta { margin: .1rem 0 0; color: var(--sub); font-size: .85rem }

.ghost,
.ghost-sm {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: transparent;
  color: var(--sub);
  font: inherit;
  cursor: pointer
}

.ghost { margin-left: auto; padding: .45rem .85rem }
.ghost-sm { padding: .4rem .7rem; font-size: .88rem; margin-top: .35rem }
.ghost:hover,
.ghost-sm:hover { color: var(--text); border-color: #cbd5e1 }

.primary,
.primary-sm {
  border: 0;
  border-radius: 8px;
  background: var(--google-blue);
  color: #fff;
  font: inherit;
  font-weight: 600;
  cursor: pointer
}

.primary { padding: .65rem 1.1rem }
.primary-sm { padding: .35rem .7rem; font-size: .85rem }
.primary:hover,
.primary-sm:hover { filter: brightness(1.05) }

.studio-grid {
  display: grid;
  gap: 1rem
}

@media (min-width: 900px) {
  .studio-grid {
    grid-template-columns: 14rem minmax(0, 1fr);
    align-items: start;
    gap: 1.25rem
  }
}

.side {
  padding: .35rem .15rem
}

.side-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .5rem;
  margin-bottom: .65rem;
  padding: 0 .35rem
}

.lesson-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: .2rem
}

.lesson-list button {
  width: 100%;
  text-align: left;
  border: 0;
  border-radius: 8px;
  padding: .55rem .65rem;
  background: transparent;
  color: var(--text);
  font: inherit;
  cursor: pointer
}

.lesson-list button:hover { background: rgba(255, 255, 255, 0.7) }
.lesson-list button.active {
  background: #fff;
  box-shadow: var(--shadow);
  color: #1e40af
}

.lesson-list .muted {
  display: block;
  color: var(--sub);
  font-size: .75rem;
  margin-top: .15rem
}

.empty {
  margin: .5rem .35rem 0;
  color: var(--sub);
  font-size: .9rem
}

/* Google Docs–like page */
.doc-shell {
  display: grid;
  gap: .75rem;
  min-width: 0
}

.doc-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem .75rem;
  padding: .45rem .65rem;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid var(--line);
  border-radius: 12px;
  box-shadow: var(--shadow)
}

.doc-status {
  margin-left: auto;
  font-size: .82rem
}

.doc-page {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 2px;
  box-shadow:
    0 1px 2px rgba(15, 23, 42, 0.04),
    0 12px 40px rgba(15, 23, 42, 0.08);
  padding: clamp(1.5rem, 4vw, 3.25rem) clamp(1.25rem, 5vw, 4.5rem) 3.5rem;
  min-height: 70vh
}

.doc-block {
  position: relative;
  margin: 0 0 1.35rem
}

.doc-block[data-field="title"] { margin-bottom: 1.75rem }

.doc-label {
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: #94a3b8;
  margin: 0 0 .35rem;
  user-select: none
}

.doc-title {
  width: 100%;
  border: 0;
  background: transparent;
  padding: .15rem 0;
  font: inherit;
  font-size: clamp(1.75rem, 3.5vw, 2.35rem);
  font-weight: 700;
  letter-spacing: -.03em;
  line-height: 1.2;
  color: var(--text);
  outline: none;
  resize: none
}

.doc-title::placeholder { color: #cbd5e1 }

.doc-body {
  width: 100%;
  border: 0;
  background: transparent;
  padding: .15rem 0;
  font: inherit;
  font-size: 1.05rem;
  line-height: 1.65;
  color: var(--text);
  outline: none;
  resize: none;
  overflow: hidden;
  min-height: 1.65em
}

.doc-body::placeholder { color: #cbd5e1 }

.doc-title:focus,
.doc-body:focus {
  background: linear-gradient(90deg, rgba(26, 115, 232, 0.04), transparent 60%)
}

.doc-title[readonly],
.doc-body[readonly] {
  cursor: default;
  background: transparent
}

.doc-insert {
  border: 0;
  background: transparent;
  color: #94a3b8;
  font: inherit;
  font-size: .88rem;
  padding: .35rem 0;
  cursor: pointer
}

.doc-insert:hover { color: var(--google-blue) }

.media-section .media-rows {
  display: grid;
  gap: .75rem;
  margin-bottom: .25rem
}

.media-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: .4rem;
  align-items: start
}

.media-row.two {
  grid-template-columns: 1fr 1.4fr auto
}

.media-row.video-row {
  grid-template-columns: 1fr;
  gap: .5rem
}

.media-row.video-row .video-controls {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: .4rem;
  align-items: center
}

@media (max-width: 640px) {
  .media-row.two { grid-template-columns: 1fr auto }
  .media-row.two .label-input { grid-column: 1 / -1 }
}

.media-row input {
  width: 100%;
  border: 0;
  border-bottom: 1px solid #e2e8f0;
  border-radius: 0;
  padding: .45rem 0;
  font: inherit;
  font-size: .95rem;
  color: var(--text);
  background: transparent
}

.media-row input:focus {
  outline: none;
  border-bottom-color: #93c5fd
}

.media-row .remove {
  border: 0;
  background: transparent;
  color: var(--sub);
  font: inherit;
  cursor: pointer;
  padding: .35rem .5rem
}

.media-row .remove:hover { color: #b91c1c }

.media-row .yt-embed {
  position: relative;
  width: 100%;
  max-width: 36rem;
  aspect-ratio: 16 / 9;
  border-radius: 8px;
  overflow: hidden;
  background: #0f172a
}

.media-row .yt-embed iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0
}

.media-row .photo-preview {
  max-width: min(100%, 22rem);
  border-radius: 8px;
  display: block;
  margin-bottom: .35rem
}

.media-row.html-row {
  grid-template-columns: 1fr;
  gap: .5rem
}

.html-embed-wrap {
  display: grid;
  gap: .5rem
}

.media-row .html-embed {
  position: relative;
  width: 100%;
  max-width: 42rem;
  min-height: 16rem;
  aspect-ratio: 4 / 3;
  border-radius: 8px;
  overflow: hidden;
  background: #0f172a
}

.media-row .html-embed iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0
}

.html-embed:fullscreen {
  max-width: none;
  width: 100vw;
  height: 100vh;
  aspect-ratio: auto;
  border-radius: 0
}

.html-embed:fullscreen iframe {
  position: absolute;
  inset: 0
}

.html-toolbar {
  display: flex;
  gap: .45rem;
  align-items: center
}

.html-toolbar button {
  border: 1px solid #e2e8f0;
  background: #fff;
  color: var(--text);
  border-radius: 8px;
  padding: .4rem .65rem;
  font: inherit;
  font-size: .84rem;
  cursor: pointer
}

.html-toolbar button:hover { border-color: #93c5fd; color: var(--google-blue) }

.html-fullscreen {
  position: absolute;
  top: .45rem;
  right: .45rem;
  z-index: 2;
  border: 0;
  border-radius: 6px;
  padding: .35rem .55rem;
  font: inherit;
  font-size: 1rem;
  line-height: 1;
  color: #e2e8f0;
  background: rgba(15, 23, 42, .72);
  cursor: pointer
}

.html-fullscreen:hover { background: rgba(30, 41, 59, .92) }

.html-title-display {
  font-size: .95rem;
  font-weight: 600;
  color: var(--text);
  padding-bottom: .25rem
}

.html-title-display[hidden] {
  display: none !important
}

.html-view[hidden] {
  display: none !important
}

.html-row.is-editing .html-embed {
  max-width: 42rem;
  min-height: 12rem;
  aspect-ratio: 16 / 10
}

.html-editor {
  display: none;
  gap: .4rem
}

.html-editor[hidden] {
  display: none !important
}

.html-row.is-editing .html-editor {
  display: grid
}

.html-row.is-editing .html-editor[hidden] {
  display: none !important
}

.html-editor .title-input {
  width: 100%;
  border: 0;
  border-bottom: 1px solid #e2e8f0;
  border-radius: 0;
  padding: .45rem 0;
  font: inherit;
  font-size: .95rem;
  color: var(--text);
  background: transparent
}

.html-editor .html-input {
  width: 100%;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  padding: .65rem .75rem;
  font: .82rem/1.45 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color: var(--text);
  background: #f8fafc;
  resize: vertical;
  min-height: 7rem
}

.html-editor .title-input:focus,
.html-editor .html-input:focus {
  outline: none;
  border-color: #93c5fd
}

.html-editor-bar {
  display: flex;
  justify-content: flex-end;
  gap: .45rem
}

.agent-hint {
  margin: .35rem 0 0;
  font-size: .82rem;
  color: var(--sub)
}

.agent-hint code {
  font-size: .78rem
}

.agent-connect-doc {
  margin: 1rem;
  padding: .75rem 1rem;
  border-radius: 8px;
  background: #fef3c7;
  color: #78350f;
  font: .82rem/1.45 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  white-space: pre-wrap
}
  display: flex;
  flex-wrap: wrap;
  gap: .65rem;
  align-items: center;
  margin-top: .5rem
}

.status {
  color: var(--sub);
  font-size: .88rem
}

.ghost-sm.danger { color: #b91c1c; border-color: #fecaca }
.ghost-sm.danger:hover { color: #991b1b; border-color: #fca5a5 }

/* Collab */
.presence-bar {
  display: flex;
  flex-wrap: wrap;
  gap: .35rem;
  margin-left: auto;
  align-items: center
}

.presence-chip {
  width: 28px;
  height: 28px;
  border-radius: 999px;
  border: 2px solid var(--pcolor, #64748b);
  overflow: hidden;
  display: grid;
  place-items: center;
  font-size: .7rem;
  font-weight: 700;
  color: #fff;
  background: var(--pcolor, #64748b)
}

.presence-chip img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block
}

.mode-toggle {
  display: inline-flex;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden
}

.mode-btn {
  border: 0;
  background: transparent;
  padding: .35rem .7rem;
  font: inherit;
  font-size: .82rem;
  color: var(--sub);
  cursor: pointer
}

.mode-btn.active {
  background: #eff6ff;
  color: #1e40af;
  font-weight: 600
}

.author-tools {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  align-items: center
}

.invite { margin: 0 }

.invite-row {
  display: flex;
  gap: .35rem
}

.invite-row input {
  width: 8.5rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: .35rem .55rem;
  font: inherit;
  font-size: .85rem
}

.role-hint {
  margin: 0;
  color: var(--sub);
  font-size: .82rem
}

.who {
  font-weight: 500;
  font-size: .75rem;
  color: var(--sub);
  text-transform: none;
  letter-spacing: 0
}

.suggest-panel {
  margin-top: .25rem;
  padding: 1rem 1.15rem;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  box-shadow: var(--shadow)
}

.suggest-form { margin-bottom: 1rem }

.field {
  display: grid;
  gap: .35rem;
  margin-bottom: 1rem
}

.field span {
  font-size: .85rem;
  font-weight: 600;
  color: var(--sub)
}

.field input,
.field textarea,
.field select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: .6rem .75rem;
  font: inherit;
  color: var(--text);
  background: #fff
}

.sug-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: .75rem
}

.sug-item {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: .75rem .85rem;
  background: #f8fafc
}

.sug-meta {
  margin: 0 0 .4rem;
  font-size: .85rem;
  color: var(--sub)
}

.sug-text {
  margin: 0;
  white-space: pre-wrap;
  font: inherit;
  font-size: .92rem;
  color: var(--text)
}

.sug-actions {
  display: flex;
  gap: .5rem;
  margin-top: .65rem
}

.empty-sug {
  color: var(--sub);
  font-size: .9rem
}

.quiz-row {
  display: grid;
  gap: .65rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: .75rem .85rem;
  background: #f8fafc;
}

.quiz-row .field {
  display: grid;
  gap: .35rem;
}

.quiz-row .field span {
  font-size: .85rem;
  color: var(--sub);
}

.live-room-chip {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  font-size: .85rem;
}

.live-room-link {
  color: var(--accent);
  font-weight: 600;
  text-decoration: none;
}

.live-room-link:hover {
  text-decoration: underline;
}

.agent-ready {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .45rem;
  margin-left: auto
}

.agent-ready-label {
  font-size: .8rem;
  font-weight: 600;
  color: var(--sub)
}

.agent-status-inline {
  width: 100%;
  margin: .35rem 0 0;
  color: var(--sub);
  font-size: .82rem
}

.connect-panel {
  margin-bottom: 1rem
}

.user-row .ghost-sm {
  margin-top: 0
}

.user-row .ghost {
  margin-left: 0
}

.odc-auth-avatar {
  border-color: rgba(15, 118, 110, 0.35) !important;
  background: #ecfdf5 !important
}