/* Small helpers on top of tokens.css + components.css for the static HTML build */

:root {
  --app-shell-max: 32rem;
}
@media (min-width: 768px) {
  :root { --app-shell-max: 42rem; }
}
@media (min-width: 1024px) {
  :root { --app-shell-max: 48rem; }
}

.app-shell {
  max-width: var(--app-shell-max);
  margin-inline: auto;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  background: var(--color-bg);
}
.app-header {
  position: sticky; top: 0; z-index: var(--z-nav);
  background: color-mix(in srgb, var(--color-bg) 92%, transparent);
  backdrop-filter: saturate(140%) blur(8px);
  border-bottom: var(--border-default);
  padding: max(0.75rem, env(safe-area-inset-top)) var(--space-4) var(--space-3);
}
.app-header__eyebrow {
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  color: var(--color-text-muted);
  text-decoration: none;
  display: inline-block;
}
.app-header__eyebrow:empty {
  display: none;
}
.app-header__title { font-family: var(--font-display); font-size: var(--text-2xl); font-weight: var(--weight-semibold); line-height: var(--leading-tight); margin-top: 2px; }
.app-header__subtitle { color: var(--color-text-muted); font-size: var(--text-xs); }
.app-header__row { display: grid; grid-template-columns: minmax(0,1fr) auto; align-items: center; gap: var(--space-3); }
.app-header__right { display: inline-flex; }
.icon-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: var(--tap-min); height: var(--tap-min);
  border-radius: var(--radius-pill);
  color: var(--color-text-muted);
  background: transparent; border: 0; cursor: pointer;
  text-decoration: none;
}
.icon-btn:hover { background: var(--color-surface-alt); color: var(--color-text); }

.app-main { flex: 1; padding: var(--space-4); padding-bottom: calc(72px + env(safe-area-inset-bottom, 0px)); }
.app-main--auth { padding-bottom: calc(var(--space-4) + env(safe-area-inset-bottom, 0px)); }
@media (min-width: 768px) {
  .app-main { padding-inline: var(--space-5); }
}

.bottom-nav {
  position: sticky; bottom: 0; z-index: var(--z-sticky);
  background: color-mix(in srgb, var(--color-bg) 96%, transparent);
  backdrop-filter: saturate(140%) blur(8px);
  border-top: var(--border-default);
  padding-bottom: env(safe-area-inset-bottom, 0px);
}
.bottom-nav__list {
  list-style: none; margin: 0; padding: 0;
  display: grid; grid-auto-flow: column; grid-auto-columns: 1fr;
  max-width: var(--app-shell-max); margin-inline: auto;
}
.bottom-nav__item a {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 2px; min-height: 56px; padding: 6px 4px;
  font-size: 11px; font-weight: var(--weight-medium);
  color: var(--color-text-muted); text-decoration: none;
}
.bottom-nav__item a[aria-current="page"] { color: var(--color-primary); }
.bottom-nav__item svg { width: 20px; height: 20px; }
.bottom-nav__list--compact { grid-auto-columns: 1fr; }

/* Section header (uppercase tiny caps) */
.section-title {
  font-size: 11px; letter-spacing: var(--tracking-caps); text-transform: uppercase;
  font-weight: var(--weight-semibold); color: var(--color-text-muted);
  margin: 0 0 var(--space-2);
}

/* Rows / list items */
.row {
  display: flex; align-items: center; gap: var(--space-3);
  padding: var(--space-3) var(--space-3);
  border-radius: var(--radius-lg);
  border: var(--border-default);
  background: var(--color-surface);
  color: var(--color-text);
  text-decoration: none;
  min-height: 60px;
}
.row + .row { margin-top: var(--space-2); }
.row:hover { background: var(--color-surface-alt); }
.row__body { min-width: 0; flex: 1; }
.row__title { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; font-size: 15px; font-weight: var(--weight-medium); }
.row__meta  { margin-top: 2px; font-size: 12px; color: var(--color-text-muted); }
.row__chev  { color: var(--color-text-subtle); }

/* Avatar circle */
.avatar {
  display: grid; place-items: center;
  width: 60px; height: 60px; border-radius: 999px;
  background: var(--color-surface-alt); color: var(--color-text);
  font-weight: var(--weight-semibold);
}

/* Utility */
.stack-4 > * + * { margin-top: var(--space-4); }
.stack-3 > * + * { margin-top: var(--space-3); }
.stack-2 > * + * { margin-top: var(--space-2); }
.cluster { display: flex; flex-wrap: wrap; gap: var(--space-2); align-items: center; }
.grow { flex: 1; }
.right { margin-left: auto; }
.muted { color: var(--color-text-muted); }
.hairline { height: 1px; background: var(--color-border); border: 0; margin: var(--space-4) 0; }
.card--soft { background: color-mix(in srgb, var(--color-surface) 70%, transparent); border-style: dashed; }

/* Highlight banner (e.g. "Next up") */
.spotlight {
  display: flex; align-items: center; gap: var(--space-3);
  padding: var(--space-4);
  border: 1px solid color-mix(in srgb, var(--color-primary) 30%, transparent);
  background: var(--color-primary-soft);
  border-radius: var(--radius-xl);
  color: var(--color-text);
  text-decoration: none;
}
.spotlight__icon {
  display: grid; place-items: center;
  width: 44px; height: 44px; border-radius: var(--radius-md);
  background: var(--color-primary); color: var(--color-primary-fg);
}
.spotlight__eyebrow { font-size: 11px; letter-spacing: var(--tracking-caps); text-transform: uppercase; font-weight: var(--weight-semibold); color: var(--color-primary); }
.spotlight__title { font-weight: var(--weight-semibold); font-size: 15px; }

/* Exercise blocks */
.exercise { padding: var(--space-4); border: var(--border-default); border-radius: var(--radius-lg); background: var(--color-surface); }
.exercise-head { display: flex; gap: var(--space-3); align-items: flex-start; }
.exercise-head__icon { display: grid; place-items: center; width: 36px; height: 36px; border-radius: var(--radius-md); background: var(--color-surface-alt); color: var(--color-text); flex: 0 0 36px; }
.exercise-head__eyebrow { font-size: 11px; letter-spacing: var(--tracking-caps); text-transform: uppercase; color: var(--color-text-muted); font-weight: var(--weight-medium); }
.exercise-head__prompt  { font-size: 15px; line-height: var(--leading-snug); margin-top: 2px; }

.worksheet-item { border: 1px solid var(--color-border); background: color-mix(in srgb, var(--color-bg) 60%, transparent); border-radius: var(--radius-md); padding: var(--space-3); }
.worksheet-item + .worksheet-item { margin-top: var(--space-2); }
.worksheet-stem { display: flex; gap: 8px; align-items: flex-start; font-size: 15px; line-height: var(--leading-relaxed); }
.worksheet-stem__num { display: grid; place-items: center; width: 24px; height: 24px; border-radius: 999px; background: var(--color-surface-alt); font-size: 12px; font-weight: var(--weight-semibold); flex: 0 0 24px; margin-top: 2px; }
.blank {
  display: inline-block; min-width: 3rem; padding: 0 4px; margin: 0 4px;
  border-bottom: 2px dashed color-mix(in srgb, var(--color-primary) 45%, transparent);
  color: var(--color-primary); font-weight: var(--weight-medium);
}

/* Feedback chips inline in an exercise */
.feedback {
  margin-top: 6px; border-radius: var(--radius-sm);
  padding: 8px 12px; font-size: 12px;
  display: flex; flex-direction: column; gap: 2px;
}
.feedback--ok  { background: var(--color-success-soft); color: var(--color-success-fg); }
.feedback--bad { background: var(--color-revision-soft); color: var(--color-revision-fg); }
.feedback__row { display: inline-flex; align-items: center; gap: 6px; font-weight: var(--weight-semibold); }

/* Audio row */
.audio-row {
  display: flex; align-items: center; gap: var(--space-3);
  padding: 8px 12px; border: var(--border-default); border-radius: var(--radius-md);
  background: var(--color-surface);
  min-height: var(--control-h-md);
  width: 100%;
  text-align: left;
  cursor: pointer;
  font: inherit;
}
.audio-row__play { display: grid; place-items: center; width: 36px; height: 36px; border-radius: 999px; background: var(--color-primary); color: var(--color-primary-fg); flex: 0 0 36px; }

/* Segmented grade toggle */
.grade-toggle { display: inline-flex; border: var(--border-default); border-radius: 999px; overflow: clip; background: var(--color-surface); }
.grade-toggle button { border: 0; background: transparent; padding: 0 12px; min-height: 36px; font: inherit; font-size: 13px; font-weight: var(--weight-medium); color: var(--color-text-muted); cursor: pointer; display: inline-flex; align-items: center; gap: 6px; }
.grade-toggle button + button { border-left: 1px solid var(--color-border); }
.grade-toggle button[aria-pressed="true"].ok  { background: var(--color-success-soft); color: var(--color-success-fg); }
.grade-toggle button[aria-pressed="true"].bad { background: var(--color-revision-soft); color: var(--color-revision-fg); }

/* Dashboard cards (tutor dashboard learner cards, learner dashboard tutor cards) */
.learner-card,
.tutor-card {
  padding: var(--space-4);
  border: var(--border-default);
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xs);
}
.learner-card__head,
.tutor-card__head { display: grid; grid-template-columns: minmax(0,1fr) auto; gap: var(--space-3); align-items: start; }
.learner-card__identity,
.tutor-card__identity { min-width: 0; }
.learner-card__name,
.tutor-card__name {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: var(--weight-semibold);
  margin-top: 2px;
}
.learner-card__actions,
.tutor-card__actions { margin-top: var(--space-3); }
.learner-card__homework,
.tutor-card__homework { margin-top: var(--space-4); }
.learner-card .dashboard-stat-section,
.tutor-card .dashboard-stat-section { margin-top: var(--space-4); }
.learner-card__footer,
.tutor-card__footer {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-3);
  margin-top: var(--space-4);
  padding-top: var(--space-3);
  border-top: var(--border-default);
}
.learner-card__tip,
.tutor-card__tip { margin: 0; font-size: var(--text-xs); line-height: var(--leading-snug); flex: 1; }
.learner-card__templates,
.tutor-card__footer-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--color-primary);
  text-decoration: none;
  white-space: nowrap;
}
.learner-card__templates:hover,
.tutor-card__footer-link:hover { color: var(--color-primary-hover); }
.avatar--accent {
  background: var(--color-accent-soft);
  color: var(--color-accent);
  font-size: var(--text-lg);
}
.homework-chips { margin-bottom: var(--space-3); }
.homework-chips-meta {
  margin: calc(-1 * var(--space-2)) 0 var(--space-3);
  font-size: var(--text-sm);
}
.homework-panels { margin-top: var(--space-2); }
.homework-panels .status-panel:not(.is-hidden) + .status-panel { margin-top: 0; }
.btn--lg { border-radius: var(--radius-pill); }

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
.learner-card__meta,
.tutor-card__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem;
}
.learner-card__meta .user-local-time,
.tutor-card__meta .user-local-time {
  flex-direction: row;
  align-items: center;
  gap: 0.35rem;
  text-align: left;
}
.eyebrow { font-size: 11px; letter-spacing: var(--tracking-caps); text-transform: uppercase; font-weight: var(--weight-medium); color: var(--color-text-muted); }

/* Role picker (index) */
.role-page { max-width: 32rem; margin-inline: auto; padding: 2rem var(--space-5) var(--space-8); min-height: 100dvh; display: flex; flex-direction: column; }
.role-hero { font-family: var(--font-display); font-size: 2rem; font-weight: var(--weight-semibold); line-height: 1.15; letter-spacing: var(--tracking-tight); margin-top: 8px; }
.role-card {
  display: flex; align-items: center; gap: var(--space-4);
  padding: var(--space-4); border-radius: var(--radius-xl);
  border: var(--border-default); background: var(--color-surface);
  text-decoration: none; color: inherit;
  min-height: 88px;
}
.role-card--primary { background: var(--color-primary); color: var(--color-primary-fg); border-color: var(--color-primary); }
.role-card__icon { display: grid; place-items: center; width: 48px; height: 48px; border-radius: var(--radius-md); background: var(--color-surface-alt); color: var(--color-text); flex: 0 0 48px; }
.role-card--primary .role-card__icon { background: rgba(255,255,255,0.15); color: var(--color-primary-fg); }
.role-card__name { font-family: var(--font-display); font-size: var(--text-xl); font-weight: var(--weight-semibold); margin-top: 2px; }

/* Icons default */
.i { width: 20px; height: 20px; stroke-width: 2; }
.i-sm { width: 16px; height: 16px; }

/* Compact form field label matches app-wide eyebrow */
.form-label { font-size: 11px; letter-spacing: var(--tracking-caps); text-transform: uppercase; font-weight: var(--weight-semibold); color: var(--color-text-muted); display: block; margin-bottom: 6px; }

/* Note card (tutor comment) */
.note {
  padding: var(--space-4); border-radius: var(--radius-xl);
  border: 1px solid transparent;
}
.note--revision { background: var(--color-revision-soft); color: var(--color-revision-fg); }
.note--graded   { background: var(--color-success-soft);  color: var(--color-success-fg); }
.note__eyebrow  { font-size: 11px; letter-spacing: var(--tracking-caps); text-transform: uppercase; font-weight: var(--weight-semibold); opacity: 0.8; }
.note__body     { margin-top: 4px; font-size: 14px; line-height: var(--leading-snug); }

/* Auth pages (login, register, password reset) */
.auth-card {
  padding: var(--space-4);
  border: var(--border-default);
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xs);
}
.auth-card > * + * { margin-top: var(--space-4); }
.auth-footer {
  margin-top: var(--space-4);
  text-align: center;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}
.auth-footer p + p { margin-top: var(--space-2); }
.auth-footer a {
  color: var(--color-primary);
  font-weight: var(--weight-semibold);
  text-decoration: none;
}
.auth-footer a:hover { color: var(--color-primary-hover); }

/* Final guard: primary/danger button labels stay white on hover. */
a.btn.btn--primary:hover,
a.btn.btn--primary:active,
.btn.btn--primary:hover,
.btn.btn--primary:active,
a.btn.btn--danger:hover,
.btn.btn--danger:hover,
a.btn.btn-primary:hover,
.btn.btn-primary:hover {
  color: #ffffff !important;
  -webkit-text-fill-color: #ffffff !important;
}
.invite-code-input {
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-family: ui-monospace, monospace;
}

/* Tutor homework, learner lexicon, and settings pages */
.homework-card,
.settings-card,
.lexicon-card {
  padding: var(--space-4);
  border: var(--border-default);
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xs);
}
.homework-card > * + *,
.settings-card > * + *,
.lexicon-card > * + * { margin-top: var(--space-4); }
.row--static {
  cursor: default;
}
.row--static:hover { background: var(--color-surface); }
.template-row-actions { margin-top: var(--space-2); }
@media (max-width: 640px) {
  .homework-card--grading {
    padding-bottom: calc(4.5rem + env(safe-area-inset-bottom));
  }
}