:root {
  --bg: #0b1220;
  --card: #121c2f;
  --card2: #0f1728;
  --text: #eef3ff;
  --muted: #a9b4cc;
  --accent: #4da3ff;
  --border: rgba(255,255,255,0.10);

  --btn: #203053;
  --btnText: #eef3ff;

  --safeTop: env(safe-area-inset-top);
  --safeBottom: env(safe-area-inset-bottom);
}

:root.light {
  --bg: #f5f7fb;
  --card: #ffffff;
  --card2: #ffffff;
  --text: #111827;
  --muted: #4b5563;
  --accent: #2563eb;
  --border: rgba(0,0,0,0.10);

  --btn: #e5e7eb;
  --btnText: #111827;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: -apple-system, system-ui, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  padding: calc(12px + var(--safeTop)) 14px 12px;
  background: linear-gradient(180deg, rgba(0,0,0,0.35), rgba(0,0,0,0.0));
  backdrop-filter: blur(12px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.title__main { font-weight: 800; font-size: 18px; }
.title__sub { color: var(--muted); font-size: 12px; margin-top: 2px; }

.topbar__actions { display: flex; gap: 10px; align-items: center; }

.btn {
  border: 1px solid var(--border);
  background: var(--btn);
  color: var(--btnText);
  padding: 10px 12px;
  border-radius: 12px;
  font-weight: 700;
  font-size: 14px;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}
.btn:active { transform: scale(0.98); }
.btn--ghost { background: transparent; }
.btn--wide { width: 100%; padding: 12px 14px; }

.tabs {
  position: sticky;
  top: calc(56px + var(--safeTop));
  z-index: 40;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 10px 12px;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: rgba(0,0,0,0.15);
  backdrop-filter: blur(12px);
}

.tab {
  flex: 0 0 auto;
  border: 1px solid var(--border);
  background: var(--card2);
  color: var(--text);
  padding: 10px 12px;
  border-radius: 999px;
  font-weight: 800;
  font-size: 13px;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}
.tab--active {
  border-color: rgba(77,163,255,0.6);
  box-shadow: 0 0 0 3px rgba(77,163,255,0.15);
}

.content {
  padding: 14px 12px calc(80px + var(--safeBottom));
  display: grid;
  gap: 12px;
  max-width: 880px;
  margin: 0 auto;
}

.panel {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
}
.panel--compact { padding-bottom: 12px; }

.panel__header {
  padding: 14px 14px 10px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px;
  border-bottom: 1px solid var(--border);
}
.panel__title { margin: 0; font-size: 16px; font-weight: 900; }
.panel__meta { color: var(--muted); font-size: 12px; margin-top: 4px; }

.list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.item {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 14px;
  border-bottom: 1px solid var(--border);
  -webkit-tap-highlight-color: transparent;
  cursor: pointer;
}
.item:last-child { border-bottom: none; }

.checkbox {
  width: 26px;
  height: 26px;
  border-radius: 8px;
  border: 2px solid rgba(255,255,255,0.25);
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  margin-top: 1px;
}
:root.light .checkbox { border-color: rgba(0,0,0,0.25); }

.item--done .checkbox {
  border-color: rgba(77,163,255,0.85);
  background: rgba(77,163,255,0.18);
}

.checkmark { font-size: 16px; opacity: 0; }
.item--done .checkmark { opacity: 1; }

.itemText { flex: 1 1 auto; }
.itemLine1 { font-weight: 900; font-size: 15px; line-height: 1.2; }
.itemLine2 { color: var(--muted); font-size: 13px; margin-top: 4px; }

.tools {
  padding: 12px 14px 0;
  display: grid;
  gap: 10px;
}

.hint {
  padding: 10px 14px 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.35;
}

.footer {
  position: fixed;
  bottom: 0;
  left: 0; right: 0;
  padding: 10px 12px calc(10px + var(--safeBottom));
  border-top: 1px solid var(--border);
  background: rgba(0,0,0,0.22);
  backdrop-filter: blur(12px);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.pill {
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.06);
  font-weight: 800;
  font-size: 12px;
}
.pill--offline {
  border-color: rgba(255,120,120,0.55);
  background: rgba(255,120,120,0.10);
}