/* Shared look for English Hub pages. shadowing.html keeps its own styles and only uses the nav. */
:root {
  --bg: #F1F0EC;
  --surface: #FFFFFF;
  --surface-2: #E7E5DE;
  --text: #17211C;
  --muted: #5E6B63;
  --line: #D7D4CA;
  --accent: #B4722E;
  --accent-ink: #FFFFFF;
  --success: #2F7A66;
  --danger: #B3412E;
  --wave-track: #DEDBD1;
  --new: #2D6FB7;
  --learn: #B3412E;
  --review: #2F7A66;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #11181A;
    --surface: #19221F;
    --surface-2: #212B27;
    --text: #ECEAE2;
    --muted: #8FA099;
    --line: #2B3733;
    --accent: #E0A458;
    --accent-ink: #1A140A;
    --success: #5FB8A0;
    --danger: #E07A66;
    --wave-track: #263330;
    --new: #7FB2EA;
    --learn: #E98F7C;
    --review: #5FB8A0;
  }
}
:root[data-theme="dark"] {
  --bg: #11181A;
  --surface: #19221F;
  --surface-2: #212B27;
  --text: #ECEAE2;
  --muted: #8FA099;
  --line: #2B3733;
  --accent: #E0A458;
  --accent-ink: #1A140A;
  --success: #5FB8A0;
  --danger: #E07A66;
  --wave-track: #263330;
  --new: #7FB2EA;
  --learn: #E98F7C;
  --review: #5FB8A0;
}

/* ---- Top navigation (used by every page) ---- */
.app-nav {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
  padding-top: env(safe-area-inset-top, 0px);
}
.app-nav .nav-inner {
  max-width: 880px;
  margin: 0 auto;
  padding: 0 16px;
  display: flex;
  align-items: center;
  gap: 14px;
  height: 52px;
}
.app-nav .brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text);
  text-decoration: none;
  flex-shrink: 0;
}
.app-nav .brand img { width: 22px; height: 22px; border-radius: 6px; }
.app-nav .tabs {
  display: flex;
  gap: 2px;
  overflow-x: auto;
  scrollbar-width: none;
  flex: 1;
  min-width: 0;
}
.app-nav .tabs::-webkit-scrollbar { display: none; }
.app-nav .tabs a {
  padding: 7px 12px;
  border-radius: 8px;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.86rem;
  font-weight: 500;
  white-space: nowrap;
}
.app-nav .avatar {
  width: 32px; height: 32px; border-radius: 50%; flex-shrink: 0;
  display: grid; place-items: center;
  background: var(--surface-2); color: var(--text); text-decoration: none;
  font-weight: 700; font-size: 0.85rem; border: 1px solid var(--line);
}
.app-nav .avatar:hover, .app-nav .avatar[aria-current="page"] { border-color: var(--accent); color: var(--accent); }
.app-nav .tabs a:hover { color: var(--text); background: var(--surface-2); }
.app-nav .tabs a[aria-current="page"] { color: var(--accent); background: var(--surface); box-shadow: inset 0 0 0 1px var(--line); }
@media (max-width: 520px) {
  .app-nav .brand span { display: none; }
  .app-nav .tabs a.wide-only { display: none; }
  .app-nav .nav-inner { gap: 8px; }
  .app-nav .tabs a { padding: 6px 7px; font-size: 0.8rem; }
}
@media (max-width: 380px) {
  .app-nav .tabs a { padding: 6px 4px; }
}

/* ---- Page basics for the new pages ---- */
html { height: 100%; }
* { box-sizing: border-box; }
body.hub {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: 'Sora', system-ui, -apple-system, "Segoe UI", sans-serif;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
.hub .wrap { max-width: 880px; margin: 0 auto; padding: 24px 16px 64px; }
.hub a { color: var(--accent); }
.hub [hidden] { display: none !important; }
.page-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; margin-bottom: 20px; }
.page-head h1 { font-size: 1.5rem; font-weight: 700; margin: 0 0 4px; letter-spacing: -0.01em; }
.page-head p { margin: 0; color: var(--muted); font-size: 0.92rem; }
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 18px 20px;
  margin-bottom: 16px;
}
.card > h2, .section-title {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--muted);
  margin: 0 0 12px;
}
.mono { font-family: 'JetBrains Mono', ui-monospace, Menlo, monospace; font-variant-numeric: tabular-nums; }
.muted { color: var(--muted); }
.small { font-size: 0.8rem; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 9px 16px;
  border-radius: 9px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--text);
  font-family: inherit;
  font-size: 0.88rem;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
}
.btn:hover { border-color: var(--accent); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); font-weight: 600; }
.btn.primary:hover { filter: brightness(1.05); }
.btn.success { background: var(--success); border-color: var(--success); color: #fff; }
.btn.danger[data-armed="1"] { background: var(--danger); border-color: var(--danger); color: #fff; }
.btn.small { padding: 5px 10px; font-size: 0.78rem; border-radius: 7px; }
.hub button:focus-visible, .hub a:focus-visible, .hub input:focus-visible, .hub select:focus-visible, .hub textarea:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}
.theme-btn {
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--muted);
  border-radius: 8px;
  padding: 7px 11px;
  font-size: 0.78rem;
  font-family: inherit;
  cursor: pointer;
  flex-shrink: 0;
}
.theme-btn:hover { color: var(--text); border-color: var(--accent); }

.field { margin-bottom: 12px; }
.field label { display: block; font-size: 0.78rem; color: var(--muted); margin-bottom: 5px; }
.input, .hub textarea, .hub select {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 9px 11px;
  color: var(--text);
  font-family: inherit;
  font-size: 0.92rem;
}
.hub textarea { resize: vertical; min-height: 54px; line-height: 1.5; }
.row { display: flex; gap: 12px; flex-wrap: wrap; }
.row > * { flex: 1; min-width: 160px; }

.toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  transform: translateX(-50%);
  background: var(--text);
  color: var(--bg);
  padding: 10px 16px;
  border-radius: 10px;
  font-size: 0.85rem;
  z-index: 50;
  max-width: calc(100% - 32px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
}
.empty { color: var(--muted); font-size: 0.88rem; padding: 18px 0; text-align: center; }

/* ---- Login / join pages ---- */
.auth-wrap { max-width: 420px; margin: 0 auto; padding: max(48px, env(safe-area-inset-top)) 16px 48px; }
.auth-brand { display: flex; align-items: center; justify-content: center; gap: 10px; font-weight: 700; font-size: 1.15rem; margin-bottom: 22px; }
.auth-brand img { width: 36px; height: 36px; border-radius: 9px; }
.auth-card { padding: 24px; }
.auth-card h1 { font-size: 1.3rem; margin: 0 0 14px; }
.auth-card .input { font-size: 1rem; }
.auth-foot { margin: 16px 0 0; }
.btn.block { width: 100%; padding: 11px 16px; font-size: 0.95rem; }
.form-error { color: var(--danger); font-size: 0.85rem; margin: 0 0 12px; }
.btn-row { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }