:root {
  color-scheme: light dark;
  --bg: #f4f5f7;
  --bg-accent: #e9ebf0;
  --surface: #ffffff;
  --border: #d8dbe2;
  --text: #16181d;
  --muted: #5e636e;
  --accent: #1f5fd6;
  --accent-text: #ffffff;
  --danger: #b4231c;
  --ok: #0f7a45;
  --radius: 14px;
  --shadow: 0 1px 2px rgb(16 24 40 / 6%), 0 8px 24px rgb(16 24 40 / 8%);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #11131a;
    --bg-accent: #171a23;
    --surface: #1b1f29;
    --border: #2d3340;
    --text: #eef0f5;
    --muted: #a0a7b6;
    --accent: #6c9bff;
    --accent-text: #0d1016;
    --danger: #ff8a80;
    --ok: #68d39b;
    --shadow: 0 1px 2px rgb(0 0 0 / 40%), 0 10px 30px rgb(0 0 0 / 35%);
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  padding: 24px 16px 40px;
  display: flex;
  justify-content: center;
  background: linear-gradient(180deg, var(--bg-accent), var(--bg) 320px);
  color: var(--text);
  font: 16px/1.5 system-ui, "Segoe UI", Rubik, Arial, sans-serif;
}

.shell { width: 100%; max-width: 560px; }

.head { text-align: center; margin-bottom: 24px; }
.logo { font-size: 40px; line-height: 1; }
.head h1 { margin: 8px 0 4px; font-size: 1.6rem; letter-spacing: -0.01em; }
.sub { margin: 0; color: var(--muted); font-size: 0.95rem; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
}

.card h2 { margin: 0 0 14px; font-size: 1.15rem; }

label {
  display: block;
  margin-bottom: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--muted);
}

input {
  width: 100%;
  padding: 13px 14px;
  font-size: 1.05rem;
  font-family: inherit;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
}

#query {
  direction: ltr;
  text-align: left;
  letter-spacing: 0.08em;
  font-variant-numeric: tabular-nums;
}

input:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.field { display: flex; gap: 10px; align-items: stretch; }
.field input { flex: 1; min-width: 0; }

button {
  font: inherit;
  cursor: pointer;
  border-radius: 10px;
  border: 1px solid transparent;
  min-height: 44px; /* comfortable touch target */
}

button.primary {
  padding: 13px 20px;
  font-weight: 600;
  background: var(--accent);
  color: var(--accent-text);
  white-space: nowrap;
}

button.primary:hover:not(:disabled) { filter: brightness(1.08); }
button[disabled] { opacity: 0.6; cursor: progress; }

#login-form button.primary { width: 100%; margin-top: 14px; }

.message { margin: 12px 0 0; min-height: 1.4em; font-size: 0.92rem; color: var(--muted); }
.message.error { color: var(--danger); font-weight: 600; }
.message.ok { color: var(--ok); font-weight: 600; }

.results { display: grid; gap: 12px; margin-top: 4px; min-width: 0; }
.results:not(:empty) { margin-top: 18px; }

.result {
  display: grid;
  gap: 14px;
  min-width: 0;
  padding: 16px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 12px;
}

.result .label {
  display: block;
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.result .serial {
  display: block;
  direction: ltr;
  text-align: right;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 1rem;
  word-break: break-all;
}

.code-row { display: flex; gap: 10px; align-items: center; margin-top: 4px; }

.code {
  flex: 1;
  min-width: 0;
  direction: ltr;
  text-align: center;
  padding: 10px 12px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: clamp(1.3rem, 6.5vw, 2rem);
  white-space: nowrap;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-indent: 0.22em;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
}

button.copy {
  padding: 10px 14px;
  font-weight: 600;
  color: var(--text);
  background: var(--surface);
  border-color: var(--border);
  white-space: nowrap;
}

button.copy:hover { border-color: var(--accent); color: var(--accent); }
button.copy.done { color: var(--ok); border-color: var(--ok); }

.foot {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-top: 18px;
  padding: 0 4px;
  font-size: 0.85rem;
  color: var(--muted);
}

button.link {
  padding: 4px 10px;
  background: none;
  color: var(--muted);
  text-decoration: underline;
}

button.link:hover { color: var(--accent); }

@media (max-width: 480px) {
  .field { flex-direction: column; }
  button.primary { width: 100%; }
  /* Give the code the full card width instead of letting it wrap mid-password. */
  .code-row { flex-direction: column; align-items: stretch; }
  button.copy { width: 100%; }
}