:root {
  /* Priority colors (required by spec) */
  --p0: #ef4444; /* red */
  --p1: #f97316; /* orange */
  --p2: #3b82f6; /* blue */
  --p3: #6b7280; /* gray */

  --bg: #0b1220;
  --surface: #0f172a;
  --surface2: #111c33;
  --text: #e5e7eb;
  --muted: #94a3b8;
  --border: #24324d;
  --danger: #ef4444;
  --ok: #22c55e;

  --radius: 14px;
  --tap: 44px;

  /* iOS safe areas */
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --safe-left: env(safe-area-inset-left, 0px);
  --safe-right: env(safe-area-inset-right, 0px);
}

/* Light mode swaps only the neutrals via CSS variables. */
html[data-theme='light'] {
  --bg: #f1f5f9;
  --surface: #ffffff;
  --surface2: #f8fafc;
  --text: #0f172a;
  --muted: #475569;
  --border: #cbd5e1;
}

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

.skip-link {
  position: absolute;
  left: 12px;
  top: 12px;
  padding: 10px 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  transform: translateY(-200%);
}
.skip-link:focus { transform: translateY(0); outline: 2px solid #93c5fd; }

.app {
  min-height: 100vh;
  padding-left: var(--safe-left);
  padding-right: var(--safe-right);
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 5;
  padding: calc(12px + var(--safe-top)) 14px 12px;
  background: linear-gradient(to bottom, rgba(11,18,32,0.98), rgba(11,18,32,0.80));
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(36,50,77,0.8);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.topbar__title {
  font-weight: 650;
  letter-spacing: 0.2px;
  font-size: 18px;
}

.main {
  padding: 14px;
  padding-bottom: calc(14px + var(--safe-bottom) + 74px); /* keep content above tabbar */
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px;
}

.row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.stack { display: grid; gap: 10px; }

.btn {
  min-height: var(--tap);
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--surface2);
  color: var(--text);
  font-weight: 600;
}
.btn:active { transform: translateY(1px); }
.btn:focus-visible { outline: 2px solid #93c5fd; outline-offset: 2px; }

.btn--primary { background: #1f2a44; border-color: #2f4368; }
.btn--danger { background: rgba(239,68,68,0.15); border-color: rgba(239,68,68,0.35); }
.btn--ghost { background: transparent; }

.input, .select, .textarea {
  width: 100%;
  min-height: var(--tap);
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: #0b162e;
  color: var(--text);
}
.textarea { min-height: 96px; resize: vertical; }
.input:focus-visible, .select:focus-visible, .textarea:focus-visible {
  outline: 2px solid #93c5fd;
  outline-offset: 2px;
}

.label { display: grid; gap: 6px; font-weight: 600; color: var(--muted); }

.list {
  display: grid;
  gap: 10px;
}

.todo {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 10px;
  align-items: start;
  padding: 12px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: #0b162e;
}

.todo__title { font-weight: 650; line-height: 1.2; }
.todo__meta { color: var(--muted); font-size: 12px; margin-top: 4px; display: flex; gap: 8px; flex-wrap: wrap; }
.todo__title--done { text-decoration: line-through; opacity: 0.7; }

.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 8px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  border: 1px solid rgba(148,163,184,0.25);
}
.badge--p0 { color: var(--p0); }
.badge--p1 { color: var(--p1); }
.badge--p2 { color: var(--p2); }
.badge--p3 { color: var(--p3); }

.iconBtn {
  min-width: var(--tap);
  min-height: var(--tap);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(17,28,51,0.6);
  color: var(--text);
}
.iconBtn:focus-visible { outline: 2px solid #93c5fd; outline-offset: 2px; }

.tabbar {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 10;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  padding: 8px 8px calc(8px + var(--safe-bottom));
  background: rgba(11,18,32,0.92);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-top: 1px solid rgba(36,50,77,0.9);
}

.tabbar__tab {
  min-height: var(--tap);
  border: 0;
  border-radius: 12px;
  background: transparent;
  color: var(--muted);
  font-weight: 700;
}
.tabbar__tab[aria-current="page"] {
  color: var(--text);
  background: rgba(148,163,184,0.12);
}
.tabbar__tab:focus-visible { outline: 2px solid #93c5fd; outline-offset: 2px; }

.modalHost {
  position: fixed;
  inset: 0;
  display: none;
  padding: calc(12px + var(--safe-top)) 12px calc(12px + var(--safe-bottom));
  background: rgba(0,0,0,0.5);
  z-index: 20;
}
.modalHost[aria-hidden="false"] { display: grid; align-items: end; }

.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 12px;
  max-height: min(82vh, 720px);
  overflow: auto;
}

.modal__header { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-bottom: 8px; }
.modal__title { font-weight: 750; font-size: 16px; }

.thumbGrid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.thumb {
  position: relative;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--border);
  background: #071024;
}
.thumb img { width: 100%; height: 100%; aspect-ratio: 1 / 1; object-fit: cover; display: block; }
.thumb button {
  position: absolute;
  top: 6px;
  right: 6px;
  min-width: 36px;
  min-height: 36px;
  border-radius: 999px;
  border: 1px solid rgba(239,68,68,0.35);
  background: rgba(239,68,68,0.15);
  color: var(--text);
  font-weight: 800;
}

.small { font-size: 12px; color: var(--muted); }
.hr { height: 1px; background: rgba(36,50,77,0.8); margin: 10px 0; }