:root {
  --bg: #0b0d0f;
  --fg: #e8eaed;
  --muted: #a1a6ad;
  --accent: #6ee7b7;
  --accent-2: #60a5fa;
}

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

.screen {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  padding: 24px;
}
.hidden { display: none; }

.center-col {
  width: 100%;
  max-width: 720px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
}

.app-title {
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--fg);
  margin: 0 0 8px;
}

.actions { display: flex; gap: 12px; flex-wrap: wrap; justify-content: center; }

.btn {
  appearance: none;
  border: 1px solid #2a2f36;
  background: #13161a;
  color: var(--fg);
  padding: 12px 18px;
  border-radius: 12px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.05s ease, background 0.2s ease, border-color 0.2s ease;
}
.btn:hover { background: #171b20; }
.btn:active { transform: translateY(1px); }
.btn.primary {
  border-color: #1f6b4f;
  background: linear-gradient(180deg, #1b4332, #0f2f24);
  color: #d1fae5;
}
.btn.ghost { background: transparent; border-color: #2a2f36; color: var(--muted); }

.input {
  width: 100%;
  background: #0f1216;
  border: 1px solid #2a2f36;
  border-radius: 12px;
  color: var(--fg);
  padding: 14px 16px;
  outline: none;
  font-size: 18px;
}
.input:focus { border-color: var(--accent-2); }

.label { color: var(--muted); font-weight: 600; }

/* Full-screen display */
.display-area {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 6vmin;
}
.display-text {
  width: 100%;
  text-align: center;
  font-weight: 800;
  line-height: 1;
  color: var(--fg);
  /* Base size; will be auto-fit by JS */
  font-size: 10vmin;
  white-space: nowrap;
  overflow-wrap: normal;
  word-break: normal;
}

.topbar {
  position: absolute;
  top: 12px;
  left: 12px;
}

/* Bigger countdown numbers */
#screen-countdown .display-text {
  font-size: 22vmin;
}

/* Larger home screen buttons */
#screen-home .btn {
  padding: 16px 24px;
  font-size: 18px;
}

/* Accessibility prefers-reduced-motion */
@media (prefers-reduced-motion: reduce) {
  .btn { transition: none; }
}