:root {
  --bg: #0b0d12;
  --bg-2: #141823;
  --fg: #e9eef7;
  --muted: #8b94a7;
  --accent: #ff3860;
  --accent-2: #36e4ff;
  --ok: #2ee59d;
  --warn: #ffb43a;
  --danger: #ff3860;
  --radius: 14px;
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bot: env(safe-area-inset-bottom, 0px);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; height: 100%; background: var(--bg); color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  overscroll-behavior: none; -webkit-tap-highlight-color: transparent;
}
body { overflow: hidden; }
#app { position: fixed; inset: 0; }

.screen { position: absolute; inset: 0; display: none; flex-direction: column; }
.screen.active { display: flex; }

.bar {
  display: flex; align-items: center; gap: 12px;
  padding: calc(14px + var(--safe-top)) 16px 14px 16px;
  background: var(--bg-2); border-bottom: 1px solid #1f2433;
}
.bar h1 { font-size: 18px; margin: 0; flex: 1; font-weight: 600; }
.bar.transparent { background: transparent; border: 0; }

.pad { padding: 18px 16px calc(24px + var(--safe-bot)) 16px; overflow-y: auto; flex: 1; }
.row { display: flex; align-items: center; justify-content: space-between; }
h2 { font-size: 14px; text-transform: uppercase; letter-spacing: 1px; color: var(--muted); margin: 18px 0 10px; }
.muted { color: var(--muted); font-size: 14px; }
.hidden { display: none !important; }

button {
  font: inherit; color: var(--fg); background: var(--bg-2); border: 1px solid #232a3b;
  padding: 12px 16px; border-radius: var(--radius); cursor: pointer; transition: transform .05s ease;
}
button:active { transform: scale(0.98); }
button.primary { background: var(--accent); border-color: var(--accent); color: white; font-weight: 600; }
button.primary.big { padding: 18px 28px; font-size: 18px; }
button.ghost { background: transparent; }
button.small { padding: 6px 10px; font-size: 13px; border-radius: 10px; }
button.block { display: block; width: 100%; margin-top: 12px; }

input[type=text] {
  width: 100%; font: inherit; color: var(--fg); background: var(--bg-2);
  border: 1px solid #232a3b; padding: 14px 16px; border-radius: var(--radius); margin: 14px 0;
}
input[type=text]:focus { outline: none; border-color: var(--accent-2); }

.splash { display: flex; flex-direction: column; align-items: center; justify-content: center; height: 100%; gap: 14px; }
.logo { font-size: 38px; font-weight: 800; letter-spacing: 2px;
  background: linear-gradient(120deg, var(--accent), var(--accent-2)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.logo-stack { display: flex; flex-direction: column; align-items: center; gap: 0; line-height: 1.05; }
.logo-stack .line-1 { letter-spacing: 6px; }
.logo-stack .line-2 { letter-spacing: 6px;
  background: linear-gradient(120deg, var(--accent-2), var(--accent)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.tag { color: var(--muted); }
.spinner { width: 32px; height: 32px; border-radius: 50%; border: 3px solid #2a3148; border-top-color: var(--accent-2); animation: spin 1s linear infinite; margin-top: 18px; }
@keyframes spin { to { transform: rotate(360deg); } }

.save-list { list-style: none; padding: 0; margin: 8px 0 0; display: flex; flex-direction: column; gap: 10px; }
.save-card { background: var(--bg-2); border: 1px solid #232a3b; border-radius: var(--radius); padding: 12px 14px; display: flex; flex-direction: column; gap: 6px; }
.save-card .top { display: flex; justify-content: space-between; align-items: center; }
.save-card .name { font-weight: 600; }
.save-card .meta { color: var(--muted); font-size: 12px; }
.save-card .acts { display: flex; gap: 8px; margin-top: 6px; flex-wrap: wrap; }
.save-card .acts button { flex: 1; min-width: 90px; padding: 8px 10px; font-size: 13px; }
.empty { background: var(--bg-2); padding: 18px; border-radius: var(--radius); border: 1px dashed #2a3148; text-align: center; }

.cards { display: grid; grid-template-columns: 1fr; gap: 12px; }
.card { background: var(--bg-2); border: 1px solid #232a3b; border-radius: var(--radius); padding: 18px; text-align: left; display: flex; flex-direction: column; gap: 4px; }
.card .card-icon { font-size: 32px; }
.card .card-title { font-size: 17px; font-weight: 600; }
.card .card-sub { color: var(--muted); font-size: 13px; }
.card.active { border-color: var(--accent); box-shadow: 0 0 0 2px rgba(255,56,96,0.2); }

.diff { display: flex; gap: 8px; }
.diff-btn { flex: 1; padding: 10px; }
.diff-btn.active { background: var(--accent-2); border-color: var(--accent-2); color: #001318; font-weight: 600; }

.ar-host { position: absolute; inset: 0; background: #000; }
.ar-host canvas { display: block; width: 100%; height: 100%; }
.ar-overlay { position: absolute; inset: 0; pointer-events: none; display: flex; flex-direction: column; }
.ar-overlay > * { pointer-events: auto; }
.ar-overlay .bar { background: linear-gradient(180deg, rgba(0,0,0,0.55), rgba(0,0,0,0)); border: 0; }
.hint { margin: 16px; padding: 12px 14px; background: rgba(0,0,0,0.55); border-radius: 12px; font-size: 14px; pointer-events: none; }
.ar-actions { margin-top: auto; padding: 16px calc(16px) calc(28px + var(--safe-bot)); display: flex; gap: 10px; justify-content: center; }
.stats { position: absolute; right: 16px; top: calc(70px + var(--safe-top)); background: rgba(0,0,0,0.55); padding: 8px 10px; border-radius: 10px; font-size: 13px; display: flex; flex-direction: column; gap: 4px; pointer-events: none; }

.hud { display: flex; gap: 12px; flex-wrap: wrap; font-size: 13px; }
.hud b { color: var(--accent-2); margin-left: 4px; }

.modal { position: absolute; inset: 0; background: rgba(0,0,0,0.65); display: flex; align-items: center; justify-content: center; z-index: 10; }
.modal-card { background: var(--bg-2); padding: 22px; border-radius: 16px; width: min(380px, 92vw); border: 1px solid #232a3b; }
.modal-card h2 { color: var(--fg); margin-top: 0; text-transform: none; letter-spacing: 0; font-size: 22px; }

.toast { position: fixed; left: 50%; bottom: calc(28px + var(--safe-bot)); transform: translateX(-50%);
  background: #1c2233; color: var(--fg); padding: 10px 14px; border-radius: 10px; font-size: 14px;
  border: 1px solid #2a3148; z-index: 100; max-width: 86vw; text-align: center; }

/* --- Tablets / large screens: bigger HUD, buttons, multi-column cards --- */
@media (min-width: 600px) and (min-height: 600px) {
  .bar { padding: calc(20px + var(--safe-top)) 24px 18px 24px; }
  .bar h1 { font-size: 22px; }
  .pad { padding: 24px 28px calc(32px + var(--safe-bot)) 28px; }
  h2 { font-size: 16px; }

  button { padding: 14px 18px; font-size: 17px; border-radius: 16px; }
  button.primary.big { padding: 24px 44px; font-size: 24px; }
  button.small { padding: 8px 14px; font-size: 15px; }

  input[type=text] { padding: 16px 18px; font-size: 18px; }

  .cards { grid-template-columns: 1fr 1fr; gap: 16px; }
  .card { padding: 22px; }
  .card .card-icon { font-size: 44px; }
  .card .card-title { font-size: 20px; }
  .card .card-sub { font-size: 15px; }

  .diff-btn { padding: 14px; font-size: 17px; }

  .hud { gap: 22px; font-size: 18px; }
  .hud b { font-size: 22px; margin-left: 6px; }

  .hint { font-size: 17px; padding: 16px 20px; margin: 22px; max-width: 60ch; }
  .stats { font-size: 17px; padding: 12px 16px; gap: 6px; top: calc(90px + var(--safe-top)); }

  #fireBtn { padding: 28px 64px; font-size: 28px; min-width: 240px; }
  .ar-actions { padding: 22px 24px calc(36px + var(--safe-bot)); gap: 16px; }

  .save-card { padding: 16px 20px; }
  .save-card .name { font-size: 18px; }
  .save-card .meta { font-size: 14px; }
  .save-card .acts button { padding: 12px 14px; font-size: 15px; }

  .modal-card { width: min(520px, 88vw); padding: 28px; }
  .modal-card h2 { font-size: 26px; }
  .toast { font-size: 16px; padding: 14px 18px; }

  .logo { font-size: 56px; }
  .tag { font-size: 18px; }
}

/* Even larger tablets (iPad Pro, big Androids in landscape). */
@media (min-width: 900px) {
  .hud { font-size: 20px; }
  .hud b { font-size: 26px; }
  #fireBtn { padding: 32px 88px; font-size: 32px; min-width: 320px; }
  .cards { grid-template-columns: repeat(3, 1fr); }
}