/* The activation page a telephone opens from the television's QR. The colours
   are the television's (docs/design.md §4): deep navy, electric blue. */
:root {
  --ground: #06111b;
  --surface: #0d1f2e;
  --surface-raised: #132b40;
  --border: #1b3448;
  --text: #f4f7fa;
  --text-quiet: #aab8c4;
  --text-faint: #718391;
  --primary: #2a90ff;
  --primary-bright: #55a8ff;
  --error: #ff6b6b;
  --ok: #3ccf91;
  color-scheme: dark;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  background: var(--ground);
  color: var(--text);
  font: 17px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  padding: max(20px, env(safe-area-inset-top)) max(20px, env(safe-area-inset-right)) max(20px, env(safe-area-inset-bottom)) max(20px, env(safe-area-inset-left));
}

.brand { display: flex; align-items: center; gap: 10px; }
.brand .mark {
  width: 0; height: 0;
  border-left: 18px solid var(--primary);
  border-top: 11px solid transparent;
  border-bottom: 11px solid transparent;
  border-radius: 3px;
}
.brand .word { font-weight: 700; letter-spacing: 0.16em; font-size: 18px; }

main { flex: 1; width: 100%; max-width: 460px; margin: 28px auto 0; }

section { display: flex; flex-direction: column; gap: 14px; }
section[hidden] { display: none; }

h1 { font-size: 26px; line-height: 1.2; margin: 0; font-weight: 650; }
p { margin: 0; color: var(--text-quiet); }
.quiet { color: var(--text-faint); font-size: 15px; }
.step { color: var(--primary-bright); font-size: 13px; font-weight: 650; letter-spacing: 0.08em; text-transform: uppercase; }

.device strong { color: var(--text); }
.code {
  color: var(--text);
  font-size: 32px;
  font-weight: 700;
  letter-spacing: 0.08em;
  font-variant-numeric: tabular-nums;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px;
  text-align: center;
}

form { display: flex; flex-direction: column; gap: 10px; }
label { font-size: 15px; color: var(--text-quiet); margin-top: 4px; }
label.check { display: flex; align-items: center; gap: 10px; margin: 2px 0 6px; }
label.check input { width: 22px; height: 22px; accent-color: var(--primary); }

input:not([type="checkbox"]) {
  width: 100%;
  min-height: 52px;
  padding: 12px 14px;
  font: inherit;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  outline: none;
}
input:not([type="checkbox"]):focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(42, 144, 255, 0.25); }
#code-input { text-transform: uppercase; letter-spacing: 0.1em; font-size: 22px; text-align: center; }

button {
  min-height: 52px;
  padding: 12px 16px;
  font: inherit;
  font-weight: 650;
  border-radius: 12px;
  border: 1px solid transparent;
  cursor: pointer;
}
button.primary { background: var(--primary); color: #04101c; }
button.primary:active { background: var(--primary-bright); }
button.plain { background: transparent; color: var(--text-quiet); border-color: var(--border); }
button:disabled { opacity: 0.5; cursor: default; }
button:focus-visible { outline: 3px solid var(--primary-bright); outline-offset: 2px; }

button.option {
  display: flex; flex-direction: column; align-items: flex-start; gap: 4px;
  text-align: left;
  background: var(--surface);
  color: var(--text);
  border-color: var(--border);
  padding: 16px;
}
button.option span { color: var(--text-quiet); font-weight: 400; font-size: 15px; }
button.option:active { background: var(--surface-raised); }

.error { color: var(--error); }
.error[hidden] { display: none; }

.done {
  width: 56px; height: 56px; border-radius: 50%;
  background: rgba(60, 207, 145, 0.14);
  border: 2px solid var(--ok);
  position: relative;
}
.done::after {
  content: ""; position: absolute; left: 19px; top: 11px;
  width: 13px; height: 24px;
  border: solid var(--ok); border-width: 0 3px 3px 0;
  transform: rotate(45deg);
}

footer { max-width: 460px; width: 100%; margin: 28px auto 0; }
footer p { color: var(--text-faint); font-size: 13px; }