/* V3 home — Classes-first, Build-second layout.
   Sits on top of studio.css for shared variables + buttons. */

/* Browsers respect the [hidden] attribute via `display: none` by default,
   but any element-level `display: flex` / `display: grid` rule we write
   silently overrides that. We hit this bug twice during build (modal
   intercepting clicks; both tabs visible at once). Single global guard
   so it never happens again on this page. */
[hidden] { display: none !important; }

.teacher-name { font-size: 13px; color: var(--text-dim); }

.home-main { padding: 20px 28px 48px 28px; max-width: 1180px; margin: 0 auto; }

/* ── Greeting hero ──────────────────────────────────────────────────── */
.greet-strip {
  display: flex; align-items: center; justify-content: space-between;
  gap: 20px; flex-wrap: wrap;
  padding: 24px 28px;
  border: 1px solid rgba(251,122,90,0.28);
  border-radius: 18px;
  background:
    radial-gradient(1100px 200px at 0% 0%, rgba(255,196,150,0.12), transparent),
    linear-gradient(135deg, rgba(251,122,90,0.16), rgba(255,150,120,0.06));
  box-shadow: 0 14px 40px rgba(0,0,0,0.22);
  margin-bottom: 28px;
}
.greet-text { min-width: 0; }
.greet-text h1 { margin: 0 0 6px 0; font-size: 24px; font-weight: 700; letter-spacing: -0.01em; }
.greet-needs { margin: 0 0 12px 0; font-size: 14px; display: inline-flex; align-items: center; gap: 8px; }
.greet-needs.calm { color: var(--text-dim); }
.greet-needs.needs { color: rgba(255,196,150,1); font-weight: 500; }
.greet-needs.load-error { color: var(--danger); }
.greet-needs.load-error .link-btn { color: inherit; font-size: inherit; padding: 0; }
.greet-needs .needs-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 3px rgba(251,122,90,0.2); flex: none; }
.greet-chips { display: flex; gap: 8px; flex-wrap: wrap; }
.greet-chip { font-size: 12px; padding: 5px 12px; border-radius: 999px; background: rgba(9,7,9,0.32); border: 1px solid rgba(255,168,140,0.18); color: var(--text); }
.greet-chip strong { color: #fff; font-weight: 700; }
.greet-chip.muted { color: var(--text-dim); }
.greet-actions { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.greet-actions .primary-btn, .greet-actions .ghost-btn { padding: 9px 16px; font-size: 13px; text-decoration: none; }

/* ── Section headers ───────────────────────────────────────────────── */
.home-section { margin: 28px 0; }
.home-section-head { margin-bottom: 12px; }
.home-section-head h2 { margin: 0 0 2px 0; font-size: 16px; font-weight: 600; letter-spacing: -0.01em; }
.home-section-head .section-sub { margin: 0; color: var(--text-dim); font-size: 12px; }

.build-head {
  display: flex; align-items: flex-end; justify-content: space-between; gap: 12px; flex-wrap: wrap;
}
.build-actions { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.build-actions .primary-btn { padding: 7px 13px; font-size: 12px; text-decoration: none; }

/* ── Tab pills ─────────────────────────────────────────────────────── */
.tab-pills { display: flex; gap: 2px; background: var(--surface-2); padding: 3px; border-radius: 8px; }
.tab-pill {
  background: transparent; border: none; color: var(--text-dim);
  padding: 6px 12px; font: inherit; font-size: 12px; cursor: pointer;
  border-radius: 6px; display: inline-flex; align-items: center; gap: 6px;
  transition: background 0.15s, color 0.15s;
}
.tab-pill:hover { color: var(--text); }
.tab-pill.active { background: var(--surface); color: var(--text); box-shadow: 0 1px 2px rgba(0,0,0,0.2); }
.tab-count {
  font-size: 10px; color: var(--text-dim); background: rgba(255,255,255,0.05);
  padding: 1px 6px; border-radius: 10px; min-width: 14px; text-align: center;
}
.tab-pill.active .tab-count { color: var(--accent); background: rgba(251, 122, 90,0.12); }

/* ── Classes grid (primary, larger cards) ──────────────────────────── */
.class-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 14px;
  align-items: start;
}
.class-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px 18px;
  display: flex; flex-direction: column; gap: 10px;
  text-decoration: none; color: var(--text);
  transition: border-color 0.15s, transform 0.1s;
  cursor: pointer;
}
.class-card:hover { border-color: var(--accent); transform: translateY(-1px); }
.class-card .class-card-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 8px; }
.class-card .class-card-title { font-size: 15px; font-weight: 600; line-height: 1.3; }
.class-card .class-card-subject { color: var(--text-dim); font-size: 12px; }
.class-card .class-card-from { display: block; margin-top: 3px; color: var(--text-dim); font-size: 11px; opacity: 0.85; }
.class-card .class-card-meta {
  display: flex; gap: 14px; flex-wrap: wrap;
  font-size: 12px; color: var(--text-dim);
  border-top: 1px solid var(--border); padding-top: 10px;
}
.class-card .class-card-meta strong { color: var(--text); font-weight: 500; }
.class-card .open-arrow {
  color: var(--accent); font-size: 12px; align-self: flex-end;
  display: inline-flex; gap: 4px; align-items: center;
}

/* Urgency chip (per rubber-duck feedback) */
.urgency-chip {
  font-size: 11px; padding: 3px 8px; border-radius: 4px;
  background: rgba(255,184,107,0.1); color: var(--warn);
  border: 1px solid rgba(255,184,107,0.25);
  display: inline-flex; align-items: center; gap: 4px; align-self: flex-start;
}
.urgency-chip.calm { background: rgba(110,208,154,0.08); color: var(--success); border-color: rgba(110,208,154,0.25); }

/* ── Build grid (secondary, compact) ───────────────────────────────── */
.build-grid[hidden] { display: none !important; }
.build-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 10px;
}
.build-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 14px;
  display: flex; flex-direction: column; gap: 6px;
  color: var(--text);
  transition: border-color 0.15s;
  min-height: 96px;
}
.build-card:hover { border-color: var(--accent); }
.build-card .bc-title-line { display: flex; align-items: center; gap: 8px; }
.build-card .bc-title { font-size: 13px; font-weight: 600; flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.build-card .bc-meta { font-size: 11px; color: var(--text-dim); }
.build-card .bc-actions { display: flex; gap: 6px; margin-top: auto; padding-top: 8px; }
.build-card .bc-actions .primary-btn, .build-card .bc-actions .ghost-btn { padding: 5px 10px; font-size: 11px; text-decoration: none; }
.build-card .bc-actions .share-toggle { margin-left: auto; }
.build-card .bc-actions .share-toggle.on { color: var(--accent); border-color: var(--accent); }

.author-chip {
  font-size: 10px; padding: 1px 6px; border-radius: 3px;
  background: var(--surface-2); color: var(--text-dim);
  display: inline-flex; align-items: center; gap: 4px;
  max-width: 46%; overflow-wrap: anywhere; text-align: right; line-height: 1.25;
}
.author-chip.self { background: rgba(251, 122, 90,0.1); color: var(--accent); }
.browse-intro {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: rgba(255,255,255,0.025);
  color: var(--text-dim);
  font-size: 12px;
}
.browse-intro strong { color: var(--text); font-size: 13px; }
.bc-access { min-height: 20px; }
.course-access-chip {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  padding: 2px 7px;
  border-radius: 999px;
  font-size: 10px;
  font-weight: 600;
  border: 1px solid var(--border);
}
.course-access-chip.private { color: var(--text-dim); background: rgba(255,255,255,0.035); }
.course-access-chip.shared { color: var(--success); background: rgba(110,208,154,0.08); border-color: rgba(110,208,154,0.25); }

.card-pill {
  font-size: 10px; padding: 2px 6px; border-radius: 4px;
  border: 1px solid var(--border); color: var(--text-dim);
  text-transform: uppercase; letter-spacing: 0.04em; font-weight: 500;
}
.card-pill.state.empty { color: var(--text-dim); }
.card-pill.state.brief_collected,
.card-pill.state.outline_drafted,
.card-pill.state.outline_confirmed { color: var(--accent); border-color: rgba(251, 122, 90,0.3); }
.card-pill.state.content_in_progress { color: var(--warn); border-color: rgba(255,184,107,0.3); }
.card-pill.state.content_drafted { color: var(--success); border-color: rgba(110,208,154,0.3); }
.card-pill.state.version_published { color: var(--success); border-color: rgba(110,208,154,0.3); background: rgba(110,208,154,0.08); }

/* ── Empty states ──────────────────────────────────────────────────── */
.loading { color: var(--text-dim); padding: 20px; text-align: center; font-size: 13px; }
.empty-card {
  grid-column: 1 / -1;
  background: var(--surface); border: 1px dashed var(--border); border-radius: 10px;
  padding: 28px 24px; text-align: center;
  display: flex; flex-direction: column; gap: 10px; align-items: center;
}
.empty-card .empty-title { font-size: 14px; font-weight: 600; color: var(--text); }
.empty-card .empty-sub { font-size: 13px; color: var(--text-dim); max-width: 480px; }
.empty-card .empty-actions { display: flex; gap: 8px; margin-top: 6px; flex-wrap: wrap; justify-content: center; }
.empty-card .primary-btn, .empty-card .ghost-btn { padding: 8px 14px; font-size: 13px; text-decoration: none; }
.load-error-card {
  border-style: solid;
  border-color: rgba(255,118,118,0.35);
  background: linear-gradient(145deg, rgba(255,118,118,0.08), var(--surface));
}
.load-error-mark {
  width: 30px; height: 30px; border-radius: 50%;
  display: grid; place-items: center;
  color: var(--danger); background: rgba(255,118,118,0.12);
  border: 1px solid rgba(255,118,118,0.3);
  font-weight: 700;
}
.inline-load-error {
  margin-top: 8px;
  color: var(--danger);
  font-size: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.inline-load-error .link-btn { color: inherit; padding: 0; font-size: inherit; }

/* ── Modal (unchanged behaviour, now correctly hidden) ─────────────── */
.modal[hidden] { display: none !important; }
.modal {
  position: fixed; top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.6);
  display: flex; align-items: center; justify-content: center;
  z-index: 50;
}
.modal-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  width: min(520px, 90vw);
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: 0 8px 32px rgba(0,0,0,0.5);
}
.modal-head { display: flex; align-items: center; justify-content: space-between; padding: 14px 18px; border-bottom: 1px solid var(--border); flex-shrink: 0; }
.modal-head h3 { margin: 0; font-size: 16px; font-weight: 600; }
.modal-body { padding: 18px; display: flex; flex-direction: column; gap: 12px; overflow-y: auto; flex: 1; min-height: 0; }
.full-input, .field-stack input, .field-stack select, .field-stack textarea {
  background: var(--surface-2); border: 1px solid var(--border);
  border-radius: 6px; padding: 8px 10px; color: var(--text); font: inherit;
  width: 100%; box-sizing: border-box;
}
.helper-text { color: var(--text-dim); font-size: 12px; margin: 0; }
.field-stack { display: flex; flex-direction: column; gap: 6px; font-size: 13px; color: var(--text-dim); }
.inline-actions { display: flex; gap: 8px; align-items: center; }
.error-text { color: var(--danger); font-size: 12px; margin: 0; }

/* Toast (shared) */
.toast {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%);
  background: var(--surface-2); border: 1px solid var(--border);
  padding: 10px 16px; border-radius: 8px; font-size: 13px; color: var(--text);
  z-index: 100; box-shadow: 0 4px 16px rgba(0,0,0,0.4);
}
.toast:empty { opacity: 0; pointer-events: none; }

/* ── Edit-course quick dropdown in the greeting strip ─────────────────── */
.edit-course-dropdown {
  position: relative;
  display: inline-block;
}
.edit-course-menu {
  position: absolute;
  top: calc(100% + 4px);
  right: 0;
  z-index: 50;
  min-width: 280px;
  max-width: 380px;
  max-height: 400px;
  overflow-y: auto;
  background: var(--surface, #1a1d23);
  border: 1px solid var(--border, rgba(255,255,255,0.12));
  border-radius: 8px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.4);
  padding: 4px;
}
.edit-course-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 8px 10px;
  border-radius: 6px;
  text-decoration: none;
  color: var(--text, #fff);
  font-size: 13px;
}
.edit-course-item:hover {
  background: rgba(255,255,255,0.06);
}
.edit-course-title {
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.edit-course-state {
  font-size: 11px;
  color: var(--text-dim, #9aa);
  white-space: nowrap;
}

/* Quick-class modal additions */
.qc-mode-pills { margin-bottom: 12px; }
.qc-stepper { margin-top: 14px; padding: 10px 12px; background: var(--surface-2); border-radius: 8px; }
.qc-stepper ol { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 6px; }
.qc-stepper li { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--text-dim, #9aa); }
.qc-stepper li .qc-step-dot { width: 10px; height: 10px; border-radius: 50%; background: var(--surface); border: 1px solid var(--border, #444); flex-shrink: 0; }
.qc-stepper li.running { color: var(--text); }
.qc-stepper li.running .qc-step-dot { background: var(--accent, #fb7a5a); border-color: var(--accent, #fb7a5a); animation: qcPulse 1.4s ease-in-out infinite; }
.qc-stepper li.done { color: var(--text); }
.qc-stepper li.done .qc-step-dot { background: #4caf50; border-color: #4caf50; }
.qc-stepper li.failed { color: #f88; }
.qc-stepper li.failed .qc-step-dot { background: #f55; border-color: #f55; }
.qc-step-sub { color: var(--text-dim, #9aa); font-size: 12px; }
@keyframes qcPulse { 0%,100% { opacity: 1; } 50% { opacity: 0.4; } }

.qc-bg-banner {
  position: fixed; right: 16px; bottom: 16px;
  background: var(--surface-2); border: 1px solid var(--border, #444);
  border-radius: 8px; padding: 10px 14px;
  display: flex; align-items: center; gap: 12px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
  font-size: 13px; z-index: 200;
}

/* Quick-class "from scratch" uploader */
.qc-drop-zone {
  border: 1.5px dashed var(--border, #444);
  border-radius: 8px;
  padding: 14px;
  margin-bottom: 10px;
  transition: border-color 0.15s, background 0.15s;
}
.qc-drop-zone.dragover {
  border-color: var(--accent, #fb7a5a);
  background: var(--surface-2);
}
.qc-drop-zone > p { margin: 0 0 6px; font-size: 13px; color: var(--text-dim, #9aa); }
.qc-source-row {
  display: flex; align-items: center; gap: 8px;
  padding: 5px 6px; font-size: 13px;
  border-top: 1px solid var(--border, #3a3a3a);
}
.qc-source-row:first-child { border-top: none; }
.qc-source-icon { flex-shrink: 0; width: 16px; text-align: center; }
.qc-source-name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.qc-source-err { color: #f88; font-size: 12px; }
.qc-source-ready .qc-source-icon { color: #4caf50; }
.qc-source-failed .qc-source-icon { color: #f55; }
.qc-source-uploading .qc-source-icon { color: var(--accent, #fb7a5a); }
.qc-source-remove { padding: 2px 6px; font-size: 12px; line-height: 1; }
.qc-upload-warnings { color: #d9a441; margin: -4px 0 10px; }

.qc-source-state { color: var(--text-dim, #9aa); font-size: 12px; flex-shrink: 0; }
.qc-source-retry { font-size: 12px; padding: 0 4px; flex-shrink: 0; }
.qc-source-status { margin: -4px 0 10px; color: var(--text-dim, #9aa); }
.qc-source-failed .qc-source-status,
.qc-source-status.is-error { color: #f88; }

.qc-spinner {
  display: inline-block; width: 12px; height: 12px;
  border: 2px solid var(--border, #555);
  border-top-color: var(--accent, #fb7a5a);
  border-radius: 50%;
  animation: qc-spin 0.7s linear infinite;
  vertical-align: middle;
}
@keyframes qc-spin { to { transform: rotate(360deg); } }

.qc-suggest-hint {
  display: flex; align-items: center; gap: 10px;
  margin: 2px 0 12px; padding: 7px 10px;
  background: var(--surface-2, rgba(251, 122, 90,0.08));
  border: 1px solid var(--border, #3a3a3a);
  border-radius: 8px; font-size: 13px;
}
.qc-suggest-text { flex: 1; color: var(--text-dim, #9aa); }

/* ── Mobile home ────────────────────────────────────────────────────── */
@media (max-width: 760px) {
  .teacher-home .v3-header {
    align-items: flex-start;
  }
  .teacher-home .v3-header-left {
    width: 100%;
    justify-content: space-between;
  }
  .teacher-home .v3-header-right {
    width: 100%;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 6px;
  }
  .teacher-home .v3-header-right .teacher-name {
    display: none;
  }
  .teacher-home .v3-header-right .ghost-btn {
    min-width: 0;
    padding: 7px 8px;
    text-align: center;
    white-space: normal;
  }
  .teacher-home .home-main {
    width: 100%;
    padding: 16px 14px 40px;
  }
  .teacher-home .greet-strip {
    align-items: flex-start;
    padding: 20px;
    margin-bottom: 24px;
  }
  .teacher-home .greet-text,
  .teacher-home .greet-actions {
    width: 100%;
  }
  .teacher-home .greet-actions > .primary-btn,
  .teacher-home .greet-actions > .ghost-btn,
  .teacher-home .greet-actions > .edit-course-dropdown {
    flex: 1 1 140px;
  }
  .teacher-home .greet-actions .edit-course-dropdown > .ghost-btn {
    width: 100%;
  }
  .teacher-home .class-grid,
  .teacher-home .build-grid {
    grid-template-columns: minmax(0, 1fr);
  }
  .teacher-home .build-head {
    align-items: stretch;
    flex-direction: column;
  }
  .teacher-home .build-actions {
    align-items: stretch;
    width: 100%;
  }
  .teacher-home .build-actions .tab-pills { flex: 1 1 auto; }
  .teacher-home .build-actions .tab-pill { flex: 1; justify-content: center; }
  .teacher-home .build-actions .primary-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }
  .teacher-home .build-card .bc-title {
    white-space: normal;
  }
  .teacher-home .build-card .bc-actions {
    flex-wrap: wrap;
  }
  .teacher-home .build-card .bc-actions .share-toggle {
    margin-left: 0;
  }
  .teacher-home .edit-course-menu {
    left: 0;
    right: auto;
    width: min(88vw, 380px);
  }
  .teacher-home .qc-bg-banner {
    left: 12px;
    right: 12px;
    bottom: max(12px, env(safe-area-inset-bottom));
    justify-content: space-between;
  }
}

@media (max-width: 480px) {
  .teacher-home .v3-header-right {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .teacher-home .greet-text h1 { font-size: 22px; }
  .teacher-home .greet-actions > .primary-btn,
  .teacher-home .greet-actions > .ghost-btn,
  .teacher-home .greet-actions > .edit-course-dropdown {
    flex-basis: 100%;
  }
  .teacher-home .build-actions {
    flex-direction: column;
  }
  .teacher-home .class-card,
  .teacher-home .build-card {
    padding-left: 14px;
    padding-right: 14px;
  }
  .teacher-home .modal-head { padding: 12px 14px; }
  .teacher-home .inline-actions {
    align-items: stretch;
    flex-direction: column;
  }
  .teacher-home .inline-actions > button { width: 100%; }
}