:root {
  --bg: #0d1117;
  --panel: #161b22;
  --border: #30363d;
  --fg: #e6edf3;
  --dim: #8b949e;
  --accent: #4ade80;
  --danger: #f87171;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  height: 100dvh; /* mobile: exclude the browser chrome / keyboard area */
  background: var(--bg);
  color: var(--fg);
  font-family: system-ui, sans-serif;
}

.hidden { display: none !important; }

.view { height: 100%; }
.center {
  display: flex; align-items: center; justify-content: center;
  padding: 1rem; overflow-y: auto;
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
  width: min(24rem, 100%);
  display: flex;
  flex-direction: column;
  gap: .75rem;
}
.card.wide { width: min(34rem, 100%); }

h1 { margin: 0; font-size: 1.4rem; }
.sub { margin: 0 0 .5rem; color: var(--dim); font-size: .9rem; }
.fine { color: var(--dim); font-size: .75rem; margin: 0; }
.mono, code { font-family: ui-monospace, monospace; }

input, textarea, select {
  width: 100%;
  background: var(--bg);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: .6rem .7rem;
  font-size: .95rem;
}
textarea { font-family: ui-monospace, monospace; font-size: .8rem; resize: vertical; }
label { display: flex; flex-direction: column; gap: .3rem; font-size: .85rem; color: var(--dim); }

button {
  background: var(--accent);
  color: #04150a;
  border: 0;
  border-radius: 8px;
  padding: .6rem 1rem;
  font-size: .95rem;
  font-weight: 600;
  cursor: pointer;
}
button:hover { filter: brightness(1.1); }
button.danger { background: transparent; color: var(--danger); border: 1px solid var(--danger); }
button.linkish {
  background: transparent; color: var(--dim); font-weight: 400;
  text-decoration: underline; padding: .2rem;
}
.tabs { display: flex; gap: .5rem; }
.tab {
  flex: 1; background: var(--bg); color: var(--dim);
  border: 1px solid var(--border); font-weight: 400;
}
.tab.active { color: var(--fg); border-color: var(--accent); }

.row { display: flex; gap: .5rem; align-items: center; }
.row.spread { justify-content: space-between; }
.grow { flex: 1; }

.error { color: var(--danger); font-size: .85rem; margin: 0; white-space: pre-wrap; }
.fp {
  display: block; background: var(--bg); border: 1px solid var(--border);
  border-radius: 8px; padding: .7rem; word-break: break-all; font-size: .85rem;
}

#session-list { display: flex; flex-direction: column; gap: .5rem; }
.session-row {
  display: flex; align-items: center; gap: .7rem;
  background: var(--bg); border: 1px solid var(--border);
  border-radius: 8px; padding: .6rem .8rem;
}
.session-row .name { font-family: ui-monospace, monospace; font-weight: 600; }
.session-row .meta { color: var(--dim); font-size: .8rem; flex: 1; }
.session-row .badge {
  font-size: .7rem; color: var(--accent);
  border: 1px solid var(--accent); border-radius: 99px; padding: .1rem .5rem;
}
.session-row button { padding: .35rem .7rem; font-size: .8rem; }
.empty { color: var(--dim); font-style: italic; padding: .5rem 0; }

#view-term { display: flex; flex-direction: column; }
#view-term.hidden { display: none !important; }
#term-bar {
  display: flex; align-items: center; gap: .6rem;
  background: var(--panel); border-bottom: 1px solid var(--border);
  padding: .4rem .8rem;
}
#term-bar button { padding: .3rem .7rem; font-size: .8rem; }
#terminal { flex: 1; min-height: 0; padding: 4px; background: #0d1117; }

#toast {
  position: fixed; bottom: 1rem; left: 50%; transform: translateX(-50%);
  background: var(--panel); border: 1px solid var(--border);
  border-radius: 8px; padding: .6rem 1rem; font-size: .9rem;
  max-width: calc(100vw - 2rem);
}

/* ── mobile ───────────────────────────────────────────────────────────── */

@media (pointer: coarse) {
  /* ≥16px inputs stop iOS Safari zooming the page on focus */
  input, textarea, select, button { font-size: 1rem; }
  .session-row button { padding: .55rem .9rem; font-size: .9rem; }
  #term-bar button { padding: .5rem .8rem; font-size: .9rem; }
}

@media (max-width: 480px) {
  .center { align-items: flex-start; padding: .75rem; }
  .card, .card.wide { padding: 1rem; width: 100%; }
  h1 { font-size: 1.2rem; }
  .session-row { flex-wrap: wrap; row-gap: .4rem; }
  .session-row .meta { flex-basis: 100%; order: 5; }
  #term-bar { padding: .3rem .5rem; gap: .4rem; }
  #term-title { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  #terminal { padding: 2px; }
  #view-term { padding-bottom: env(safe-area-inset-bottom, 0); }
}