/* ============================================================
   REBUILT — layout.css
   App shell + responsive behaviour.

   ≥ 1080px  Full sidebar (labels, user card, level bar)
   720–1079  Icon rail (labels move to tooltips)
   < 720     Top bar + bottom tab bar + "More" sheet; dialogs become
             bottom sheets; lists switch to single-column cards.
   ============================================================ */

#app {
  display: grid;
  grid-template-columns: var(--sidebar-w) minmax(0, 1fr);
  min-height: 100dvh;
}

/* ---------- Sidebar ---------- */

.sidebar {
  position: sticky;
  inset-block-start: 0;
  display: flex;
  flex-direction: column;
  gap: var(--s-4);
  height: 100dvh;
  padding: var(--s-5) var(--s-3) var(--s-4);
  background: var(--bg-deep);
  border-inline-end: 1px solid var(--border-soft);
  overflow-y: auto;
  overflow-x: hidden;
}

.sidebar__brand {
  display: flex;
  align-items: center;
  padding: var(--s-2) var(--s-3) var(--s-3);
  border: 0;
  background: none;
  text-align: start;
}
.sidebar__lockup { display: block; width: 168px; height: auto; max-width: 100%; }
.sidebar__mark { display: none; width: 40px; height: auto; margin-inline: auto; }

.sidebar__nav { display: flex; flex-direction: column; gap: 2px; flex: 1; }
.sidebar__group { display: flex; flex-direction: column; gap: 2px; }
.sidebar__group + .sidebar__group { margin-top: var(--s-3); padding-top: var(--s-3); border-top: 1px solid var(--border-soft); }
.sidebar__group-label {
  padding: 0 var(--s-3) var(--s-1);
  font-size: var(--fs-2xs);
  font-weight: var(--fw-bold);
  letter-spacing: 0.06em;
  color: var(--ink-faint);
}

.nav-item {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--s-3);
  width: 100%;
  min-height: 44px;
  padding: 0 var(--s-3);
  border: 0;
  border-radius: var(--r-md);
  background: transparent;
  color: var(--ink-soft);
  font-size: var(--fs-md);
  font-weight: var(--fw-bold);
  text-align: start;
  -webkit-tap-highlight-color: transparent;
  transition: background var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}
.nav-item .icon { font-size: 20px; }
.nav-item:hover { background: var(--surface); color: var(--ink); }
.nav-item.is-active { background: var(--primary-soft); color: var(--primary); }
.nav-item.is-active::before {
  content: "";
  position: absolute;
  inset-block: 10px;
  inset-inline-start: calc(var(--s-3) * -1);
  width: 4px;
  border-radius: 4px 0 0 4px;
  background: var(--grad-brand);
}
.nav-item__label { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.nav-item .badge { font-size: 10px; padding: 0 8px; }

.sidebar__user {
  display: flex;
  align-items: center;
  gap: var(--s-3);
  width: 100%;
  padding: var(--s-3);
  border: 1px solid var(--border-soft);
  border-radius: var(--r-lg);
  background: var(--surface);
  text-align: start;
  transition: border-color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}
.sidebar__user:hover { border-color: var(--border-strong); background: var(--surface-hover); }
.sidebar__user.is-active { border-color: rgba(255, 229, 4, 0.5); }
.sidebar__user-info { display: flex; flex-direction: column; gap: 6px; flex: 1; min-width: 0; }
.sidebar__username { font-weight: var(--fw-black); font-size: var(--fs-sm); line-height: 1.2; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.sidebar__level { display: flex; align-items: center; justify-content: space-between; gap: var(--s-2); font-size: var(--fs-xs); color: var(--ink-faint); }
.sidebar__streak { display: inline-flex; align-items: center; gap: 3px; color: var(--brand-orange); font-weight: var(--fw-bold); }

/* ---------- Main ---------- */

.main { min-width: 0; }
.page-content {
  width: 100%;
  max-width: var(--content-max);
  margin-inline: auto;
  padding: var(--s-8) var(--gutter) var(--s-16);
}

/* ---------- Mobile chrome ---------- */

.topbar, .bottom-nav { display: none; }

.topbar {
  position: sticky;
  inset-block-start: 0;
  z-index: 50;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-3);
  height: calc(var(--topbar-h) + var(--safe-top));
  padding: var(--safe-top) var(--s-4) 0;
  background: rgba(16, 15, 11, 0.86);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-soft);
}
.topbar__brand { display: flex; align-items: center; border: 0; background: none; padding: 0; }
.topbar__brand img { display: block; height: 30px; width: auto; }
.topbar__end { display: flex; align-items: center; gap: var(--s-3); }
.pill {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  height: 32px;
  padding: 0 12px;
  border-radius: var(--r-pill);
  background: var(--surface);
  border: 1px solid var(--border-soft);
  font-size: var(--fs-sm);
  font-weight: var(--fw-bold);
}
.pill--streak { color: var(--brand-orange); }
.pill--xp { color: var(--primary); }
.topbar__avatar { padding: 0; border: 0; background: none; border-radius: 50%; }

.bottom-nav {
  position: fixed;
  inset-inline: 0;
  inset-block-end: 0;
  z-index: 60;
  height: calc(var(--mobile-nav-h) + var(--safe-bottom));
  padding: 0 var(--s-2) var(--safe-bottom);
  background: rgba(16, 15, 11, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-top: 1px solid var(--border-soft);
}
.bottom-nav__inner { display: grid; grid-template-columns: repeat(5, 1fr); height: var(--mobile-nav-h); }
.tab-item {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  min-width: 0;
  border: 0;
  background: none;
  color: var(--ink-faint);
  font-size: 10.5px;
  font-weight: var(--fw-bold);
  -webkit-tap-highlight-color: transparent;
  transition: color var(--t-fast) var(--ease);
}
.tab-item .icon { font-size: 23px; }
.tab-item.is-active { color: var(--primary); }
.tab-item.is-active::before {
  content: "";
  position: absolute;
  inset-block-start: 0;
  width: 28px;
  height: 3px;
  border-radius: 0 0 4px 4px;
  background: var(--grad-brand);
}

.more-sheet-overlay { position: fixed; inset: 0; z-index: 70; background: var(--overlay); opacity: 0; transition: opacity var(--t-med) var(--ease); }
.more-sheet-overlay.is-visible { opacity: 1; }
.more-sheet {
  position: fixed;
  inset-inline: 0;
  inset-block-end: 0;
  z-index: 71;
  padding: var(--s-3) var(--s-4) calc(var(--mobile-nav-h) + var(--s-4) + var(--safe-bottom));
  background: var(--surface);
  border: 1px solid var(--border);
  border-bottom: 0;
  border-radius: var(--r-xl) var(--r-xl) 0 0;
  box-shadow: var(--shadow-3);
  transform: translateY(100%);
  transition: transform var(--t-med) var(--ease);
}
.more-sheet.is-visible { transform: none; }
.more-sheet__grab { width: 40px; height: 4px; margin: 0 auto var(--s-4); border-radius: 4px; background: var(--border-strong); }
.more-sheet__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--s-2); }
.more-tile {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--s-2);
  min-height: 88px;
  padding: var(--s-3) var(--s-2);
  border: 1px solid var(--border-soft);
  border-radius: var(--r-md);
  background: var(--surface-2);
  color: var(--ink-soft);
  font-size: var(--fs-xs);
  font-weight: var(--fw-bold);
  text-align: center;
}
.more-tile .icon { font-size: 24px; color: var(--ink); }
.more-tile.is-active { border-color: rgba(255, 229, 4, 0.5); color: var(--primary); }
.more-tile.is-active .icon { color: var(--primary); }
.more-tile .badge { position: absolute; inset-block-start: 6px; inset-inline-end: 6px; font-size: 9px; padding: 0 6px; }

/* ---------- Page header ---------- */

.page-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--s-4);
  margin-bottom: var(--s-6);
}
.page-header__text { min-width: 0; }
.page-header__title {
  display: flex;
  align-items: center;
  gap: var(--s-3);
  font-size: var(--fs-3xl);
  font-weight: var(--fw-black);
  line-height: var(--lh-tight);
}
.page-header__sub { margin-top: var(--s-1); color: var(--ink-soft); font-size: var(--fs-md); }
.page-header__actions { display: flex; flex-wrap: wrap; align-items: center; gap: var(--s-2); }

/* ---------- Grids ---------- */

.stack { display: flex; flex-direction: column; gap: var(--s-4); }
.stack--lg { gap: var(--s-6); }
.cluster { display: flex; flex-wrap: wrap; align-items: center; gap: var(--s-2); }

.grid { display: grid; gap: var(--s-4); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
/* Primary column + side column, e.g. Dashboard / Habits */
.split { display: grid; grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr); gap: var(--s-4); align-items: start; }
.split--even { grid-template-columns: repeat(2, minmax(0, 1fr)); }

/* ---------- Tablet: icon rail ---------- */

@media (min-width: 720px) and (max-width: 1079px) {
  :root { --sidebar-w: var(--rail-w); }
  .sidebar { padding-inline: var(--s-2); align-items: center; }
  .sidebar__brand { justify-content: center; padding-inline: 0; }
  .sidebar__lockup { display: none; }
  .sidebar__mark { display: block; }
  .sidebar__nav, .sidebar__group { align-items: center; width: 100%; }
  .sidebar__group-label { display: none; }
  .nav-item { justify-content: center; width: 52px; min-height: 52px; padding: 0; }
  .nav-item .icon { font-size: 22px; }
  .nav-item__label, .nav-item .badge { display: none; }
  .nav-item.is-active::before { inset-inline-start: calc(var(--s-2) * -1); }
  .nav-item[data-tip]:hover::after {
    content: attr(data-tip);
    position: absolute;
    inset-inline-end: calc(100% + 12px);
    inset-block-start: 50%;
    transform: translateY(-50%);
    padding: 4px 10px;
    border-radius: var(--r-sm);
    background: var(--surface-3);
    border: 1px solid var(--border);
    color: var(--ink);
    font-size: var(--fs-xs);
    white-space: nowrap;
    pointer-events: none;
    z-index: 5;
  }
  .sidebar { overflow: visible; }
  .sidebar__user { justify-content: center; padding: var(--s-2); width: auto; border-radius: 50%; background: none; border-color: transparent; }
  .sidebar__user-info { display: none; }
  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* ---------- Narrow laptop / tablet: collapse two-column splits ---------- */

@media (max-width: 1079px) {
  .split { grid-template-columns: minmax(0, 1fr); }
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* ---------- Mobile ---------- */

@media (max-width: 719px) {
  #app { display: block; }
  .sidebar { display: none; }
  .topbar, .bottom-nav { display: flex; }
  .bottom-nav { display: block; }
  .page-content { padding: var(--s-5) var(--gutter) calc(var(--mobile-nav-h) + var(--s-10) + var(--safe-bottom)); }
  .page-header { margin-bottom: var(--s-5); }
  .page-header__title { font-size: var(--fs-2xl); }
  .page-header__actions { width: 100%; }
  .page-header__actions .btn { flex: 1; }
  .grid--2, .grid--3, .grid--4, .split--even { grid-template-columns: minmax(0, 1fr); }
  .card { padding: var(--s-5) var(--s-4); border-radius: var(--r-lg); }
  .row { grid-template-columns: auto minmax(0, 1fr) auto; margin-inline: calc(var(--s-3) * -1); padding-inline: var(--s-3); }
  .row + .row::before { inset-inline: var(--s-3); }
  .row__icon { display: none; }
  .row__actions { display: none; }
  .row__xp { font-size: 11px; padding-inline: 8px; }
  .stat-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 380px) {
  .row__xp { display: none; }
}