/* ══════════════════════════════════════════════
   APP SHELL
══════════════════════════════════════════════ */
#app {
  display: flex;
  flex-direction: column;
  height: 100vh;
  background: var(--bg,#030810);
  transition: background .3s;
}

/* ── CHROME FIXE ─────────────────────────────── */
#chrome {
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  background: var(--surf,#080d1a);
  border-bottom: 1px solid var(--brd,#0a2040);
  z-index: 10;
  padding-top: 10px;
}

/* ── TOP NAV — child round buttons + admin ── */
#child-tabs {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: 14px;
  padding: 0 16px 10px;
}

.ctab-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  cursor: pointer;
}

.ctab {
  width: 58px;
  height: 58px;
  border-radius: 50%;
  background: var(--card,#0d1422);
  border: 2px solid var(--brd,#0a2040);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all .2s;
  position: relative;
  flex-shrink: 0;
}

.ctab.active {
  border-color: var(--hi,#00cfff);
  background: var(--dim,#0a1828);
  box-shadow: 0 0 14px rgba(0,207,255,.25), 0 0 0 3px rgba(0,207,255,.1);
}

.ctab.active::after {
  content: '';
  position: absolute;
  inset: -5px;
  border-radius: 50%;
  border: 1.5px solid var(--hi,#00cfff);
  opacity: .4;
  animation: ring-pulse 2s ease-in-out infinite;
}

@keyframes ring-pulse {
  0%,100% { transform: scale(1);    opacity: .4; }
  50%      { transform: scale(1.08); opacity: .15; }
}

.ctab-em  { font-size: var(--fs-xxl); line-height: 1; display: block; }
.ctab-nm  { font-size: var(--fs-xs); font-weight: 700; color: var(--muted,#2a5070); letter-spacing: .3px; display: block; }
.ctab-chf { font-size: var(--fs-xs); font-weight: 800; display: block; }
.ctab.active .ctab-nm { color: var(--hi,#00cfff); }

/* Admin parent button — uses BO theme colors via inline styles */
#admin-round {
  width: 58px;
  height: 58px;
  border-radius: 50%;
  background: var(--card,#0d1422);
  border: 2px solid var(--brd,#0a2040);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all .2s;
  flex-shrink: 0;
}

#admin-round:active { box-shadow: 0 0 12px rgba(255,179,0,.3); }
.ar-em  { font-size: var(--fs-xl); line-height: 1; }

/* Stats bar */
#stats-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px 8px;
  max-width: 100%;
  margin: 0 auto;
  width: 100%;
}

.sb-chf {
  font-family: var(--font-title,'Share Tech Mono',monospace);
  font-size: var(--fs-xxl);
  font-weight: 700;
  color: var(--hi,#00cfff);
  line-height: 1;
  white-space: nowrap;
}

.sb-sep {
  width: 1px;
  height: 28px;
  background: var(--brd2,#14305a);
  flex-shrink: 0;
}

.sb-level {
  flex: 1;
  min-width: 0;
}

.sb-lvl-labels {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 8px;
}

.sb-lvl-name {
  font-family: var(--font-title,'Share Tech Mono',monospace);
  font-size: var(--fs-sm);
  font-weight: 700;
  letter-spacing: .5px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sb-lvl-next {
  font-family: var(--font-title,'Share Tech Mono',monospace);
  font-size: var(--fs-xs);
  font-weight: 400;
  letter-spacing: .5px;
  white-space: nowrap;
  text-align: right;
  overflow: hidden;
  text-overflow: ellipsis;
  min-width: 0;
}

.sb-prog-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 6px;
  margin-top: 4px;
}

.sb-prog-track {
  flex: 1;
  height: 6px;
  background: var(--dim,#0a1828);
  border-radius: 3px;
  overflow: hidden;
  border: 1px solid var(--brd,#0a2040);
}

.sb-prog-fill {
  height: 100%;
  background: var(--bar);
  border-radius: 3px;
  box-shadow: 0 0 6px rgba(0,207,255,.3);
  transition: width .8s cubic-bezier(.4,0,.2,1);
}

.sb-prog-pct {
  font-size: var(--fs-xs);
  color: var(--hi3,#4db8ff);
  white-space: nowrap;
  font-weight: 700;
}

.sb-streak {
  font-size: var(--fs-xxl);
  line-height: 1;
  flex-shrink: 0;
}

.sb-streak-lbl {
  font-size: var(--fs-xs);
  color: var(--muted,#2a5070);
  text-align: center;
  margin-top: 1px;
}

/* Section nav — hidden, replaced by bottom nav */
#section-nav { display: none; }

/* ── BOTTOM NAV — 3 round section buttons ── */
#bottom-nav {
  position: fixed;
  bottom: 18px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 20px;
  align-items: center;
  z-index: 50;
  background: var(--surf,#080d1a);
  border: 1px solid var(--brd,#0a2040);
  border-radius: 40px;
  padding: 8px 20px;
  box-shadow: 0 4px 24px rgba(0,0,0,.5);
  backdrop-filter: blur(8px);
}

.bnav-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  cursor: pointer;
}

.bnav-btn {
  width: 54px;
  height: 54px;
  border-radius: 50%;
  background: var(--card,#0d1422);
  border: 2px solid var(--brd,#0a2040);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all .2s;
  flex-shrink: 0;
}

.bnav-btn.active {
  background: var(--acc,#ff3d7f);
  border-color: var(--acc,#ff3d7f);
  box-shadow: 0 0 16px rgba(255,61,127,.35);
}

.bnav-btn.active .bnav-em { filter: none; }
.bnav-btn:not(.active) .bnav-em { filter: grayscale(.5); opacity: .5; }

.bnav-em  { font-size: var(--fs-xxl); line-height: 1; display: block; transition: all .2s; }
.bnav-lbl { font-size: var(--fs-xs); font-weight: 700; color: rgba(255,255,255,.5); display: block; letter-spacing: .3px; }
.bnav-lbl.active { color: rgba(255,255,255,.9); }

/* ── CONTENT AREA ────────────────────────────── */
#content-wrap {
  flex: 1;
  overflow: hidden;
  display: flex;
  position: relative;
}

#main {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  -webkit-overflow-scrolling: touch;
}

.tab-pane { display: none; padding: 12px 14px 120px; max-width: 100%; margin: 0 auto; width: 100%; }
.tab-pane.active { display: block; }

/* ══════════════════════════════════════════════
   LANDSCAPE MODE — Sidebar left + compact top bar
══════════════════════════════════════════════ */
@media (orientation: landscape) {
  #app { flex-direction: row; }

  #sidebar {
    display: flex;
    flex-direction: column;
    width: 70px;
    flex-shrink: 0;
    background: var(--surf,#080d1a);
    border-right: 1px solid var(--brd,#0a2040);
    z-index: 10;
    padding: 8px 0;
  }

  .side-child {
    padding: 10px 6px;
    text-align: center;
    cursor: pointer;
    border-left: 3px solid transparent;
    transition: all .2s;
  }

  .side-child.active {
    border-left-color: var(--hi,#00cfff);
    background: rgba(0,207,255,.06);
  }

  .side-child-em  { font-size: var(--fs-xxl); display: block; }
  .side-child-nm  { font-size: var(--fs-xs); color: var(--muted,#2a5070); margin-top: 2px; display: block; }
  .side-child-chf { font-size: var(--fs-xs); color: var(--gold,#00cfff); font-weight: 800; display: block; }
  .side-child.active .side-child-nm { color: var(--hi,#00cfff); }

  .side-sep { flex: 1; }

  .side-section {
    padding: 10px 6px;
    text-align: center;
    cursor: pointer;
    border-left: 3px solid transparent;
    transition: all .2s;
  }

  .side-section.active {
    border-left-color: var(--acc,#ff3d7f);
    background: rgba(255,61,127,.06);
  }

  .side-section-em  { font-size: var(--fs-xl); display: block; }
  .side-section-lbl { font-size: var(--fs-xs); color: var(--muted,#2a5070); margin-top: 2px; display: block; letter-spacing: .3px; }
  .side-section.active .side-section-lbl { color: var(--acc,#ff3d7f); }

  .side-admin {
    padding: 10px 6px;
    text-align: center;
    cursor: pointer;
    border-top: 1px solid var(--brd,#0a2040);
    margin-top: 4px;
  }

  .side-links {
    padding: 4px 6px 8px;
    display: flex;
    flex-direction: column;
    gap: 2px;
  }
  .side-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 8px 4px;
    text-decoration: none;
    border-radius: 6px;
    transition: background .15s;
  }
  .side-link:hover { background: rgba(0,207,255,.08); }
  .side-link svg { width: 20px; height: 20px; fill: var(--muted,#2a5070); transition: fill .2s; }
  .side-link:hover svg { fill: var(--hi,#00cfff); }
  .side-link span { font-size: var(--fs-xs); color: var(--muted,#2a5070); margin-top: 2px; display: block; letter-spacing: .3px; transition: color .2s; }
  .side-link:hover span { color: var(--hi,#00cfff); }

  /* Right column */
  #right-col {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    min-width: 0;
  }

  #chrome {
    padding: 6px 14px 6px;
    flex-direction: row;
    align-items: center;
    gap: 12px;
  }

  #child-tabs  { display: none; }
  #section-nav { display: none; }

  #stats-bar {
    flex: 1;
    padding: 0;
  }

  .sb-chf { font-size: var(--fs-xl); }
}

/* Portrait: hide sidebar */
@media (orientation: portrait) {
  #sidebar    { display: none; }
  #right-col  { display: contents; }
}