* { box-sizing: border-box; margin: 0; padding: 0; }

[hidden] { display: none !important; }

:root {
  --bg: #f4f6fa;
  --card: #ffffff;
  --text: #16202e;
  --muted: #6b7686;
  --primary: #1f7a4d;
  --primary-text: #ffffff;
  --warn: #b7791f;
  --warn-bg: #fdf3df;
  --danger: #c0392b;
  --border: #e3e8ef;
  --shadow: 0 4px 16px rgba(22, 32, 46, 0.08);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #10151f;
    --card: #1a2230;
    --text: #eef2f7;
    --muted: #93a0b4;
    --primary: #2ea36b;
    --warn: #e2b23c;
    --warn-bg: #2c2515;
    --border: #2a3547;
    --shadow: 0 4px 16px rgba(0, 0, 0, 0.35);
  }
}

html, body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  min-height: 100%;
}

#app {
  max-width: 420px;
  margin: 0 auto;
  padding: 24px 20px calc(20px + env(safe-area-inset-bottom));
  display: flex;
  flex-direction: column;
  gap: 16px;
  min-height: 100dvh;
}

header { text-align: center; padding-top: 8px; }
header h1 { font-size: 1.7rem; letter-spacing: -0.02em; }
.tagline { color: var(--muted); font-size: 0.85rem; margin-top: 2px; }

h2 { text-align: center; font-size: 1.15rem; font-weight: 600; margin: 12px 0 4px; }

section { display: flex; flex-direction: column; gap: 12px; }

button {
  font: inherit;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  border-radius: 16px;
  cursor: pointer;
  transition: transform 0.06s ease, opacity 0.15s ease;
  -webkit-tap-highlight-color: transparent;
}
button:active { transform: scale(0.97); }
button:disabled { opacity: 0.5; cursor: default; }

.big {
  padding: 18px 20px;
  font-size: 1.1rem;
  font-weight: 600;
  box-shadow: var(--shadow);
}
.primary { background: var(--primary); border-color: var(--primary); color: var(--primary-text); }
.warn { background: var(--warn-bg); border-color: var(--warn); color: var(--warn); }
.ghost { background: transparent; box-shadow: none; color: var(--muted); }

.banner {
  padding: 12px;
  border-radius: 12px;
  font-size: 0.95rem;
  border-style: dashed;
  color: var(--muted);
}

.status-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 20px;
  box-shadow: var(--shadow);
  padding: 32px 20px;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: center;
}

.big-emoji { font-size: 3.4rem; line-height: 1; }
.status-text { font-size: 1.25rem; font-weight: 700; }
.subtext { color: var(--muted); font-size: 0.9rem; min-height: 1.2em; }

.timer {
  font-variant-numeric: tabular-nums;
  font-size: 3.6rem;
  font-weight: 800;
  letter-spacing: 0.02em;
}
.timer.urgent { color: var(--danger); }

input {
  font: inherit;
  padding: 16px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  width: 100%;
  font-size: 1.05rem;
}
input:focus { outline: 2px solid var(--primary); border-color: transparent; }

.error { color: var(--danger); text-align: center; font-size: 0.9rem; font-weight: 600; }

.hint { color: var(--muted); text-align: center; font-size: 0.88rem; margin-top: -6px; }

.install-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: var(--shadow);
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 0.95rem;
}
.install-card ol { padding-left: 22px; display: flex; flex-direction: column; gap: 6px; }
.install-card .hint { text-align: left; margin-top: 0; }

.pill {
  text-align: center;
  padding: 10px 16px;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 600;
  background: var(--card);
  border: 1px solid var(--border);
}
.pill.ok { color: var(--primary); border-color: var(--primary); }
.pill.no { color: var(--danger); border-color: var(--danger); }

#requests { display: flex; flex-direction: column; gap: 10px; }
.request {
  background: var(--card);
  border: 1px solid var(--warn);
  border-radius: 16px;
  padding: 14px 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  box-shadow: var(--shadow);
}
.request .who { flex: 1; font-weight: 600; font-size: 0.98rem; }
.request button {
  padding: 10px 14px;
  border-radius: 12px;
  font-weight: 700;
  font-size: 0.9rem;
}
.request .accept { background: var(--primary); border-color: var(--primary); color: #fff; }
.request .decline { color: var(--danger); }

footer {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding-top: 12px;
  font-size: 0.8rem;
}
footer a { color: var(--muted); text-decoration: none; }
.footer-row { display: flex; align-items: center; gap: 10px; }
.credit { color: var(--muted); }
.credit a { text-decoration: underline; }
.conn { color: var(--danger); font-size: 0.7rem; }
.conn.live { color: var(--primary); }