:root {
  --bg: #eef1f8;
  --bg-2: #e2e7f4;
  --glow: rgba(59, 99, 230, 0.10);
  --card: #ffffff;
  --card-border: #e2e7f1;
  --text: #1b2333;
  --muted: #626b7e;
  --accent: #3b63e6;
  --accent-dark: #2c4fc9;
  --accent-soft: rgba(59, 99, 230, 0.12);
  --accent-ring: rgba(59, 99, 230, 0.28);
  --brand-grad: linear-gradient(135deg, #4f74f0 0%, #7b5cf0 100%);
  --danger: #c62f3b;
  --danger-soft: rgba(198, 47, 59, 0.10);
  --ok: #1e7a3d;
  --ok-soft: rgba(30, 122, 61, 0.10);
  --input-bg: #f8fafd;
  --border: #d9dee8;
  --field-shadow: inset 0 1px 2px rgba(20, 28, 46, 0.04);
  --radius: 14px;
  --radius-sm: 9px;
  --shadow: 0 1px 2px rgba(20, 28, 46, 0.06), 0 12px 34px -8px rgba(20, 28, 46, 0.16);
}

/* Dark palette. Applied two ways (keep the two blocks below in sync):
   1) automatically when the OS prefers dark AND the user hasn't chosen a theme;
   2) explicitly when theme.js sets data-theme="dark" (System/Light/Dark toggle). */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --bg: #0d111b;
    --bg-2: #131a2b;
    --glow: rgba(94, 129, 255, 0.14);
    --card: #161d2c;
    --card-border: rgba(255, 255, 255, 0.07);
    --text: #e8ecf6;
    --muted: #99a3ba;
    --accent: #6d8dff;
    --accent-dark: #5877f0;
    --accent-soft: rgba(109, 141, 255, 0.16);
    --accent-ring: rgba(109, 141, 255, 0.40);
    --danger: #ff7a84;
    --danger-soft: rgba(255, 122, 132, 0.12);
    --ok: #6ee29a;
    --ok-soft: rgba(110, 226, 154, 0.12);
    --input-bg: #0f1622;
    --border: rgba(255, 255, 255, 0.11);
    --field-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.30);
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 18px 44px -10px rgba(0, 0, 0, 0.6);
  }
}
:root[data-theme="dark"] {
  --bg: #0d111b;
  --bg-2: #131a2b;
  --glow: rgba(94, 129, 255, 0.14);
  --card: #161d2c;
  --card-border: rgba(255, 255, 255, 0.07);
  --text: #e8ecf6;
  --muted: #99a3ba;
  --accent: #6d8dff;
  --accent-dark: #5877f0;
  --accent-soft: rgba(109, 141, 255, 0.16);
  --accent-ring: rgba(109, 141, 255, 0.40);
  --danger: #ff7a84;
  --danger-soft: rgba(255, 122, 132, 0.12);
  --ok: #6ee29a;
  --ok-soft: rgba(110, 226, 154, 0.12);
  --input-bg: #0f1622;
  --border: rgba(255, 255, 255, 0.11);
  --field-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.30);
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 18px 44px -10px rgba(0, 0, 0, 0.6);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem 1rem;
  background:
    radial-gradient(1100px 620px at 50% -12%, var(--glow), transparent 70%),
    linear-gradient(160deg, var(--bg) 0%, var(--bg-2) 100%);
  background-attachment: fixed;
}

.card {
  position: relative;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  width: 100%;
  max-width: 27rem;
  padding: 2.25rem 2.1rem;
  overflow: hidden;
  animation: cardIn 0.5s cubic-bezier(0.22, 1, 0.36, 1) both;
}

/* Gradient accent edge along the top of the card. */
.card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: var(--brand-grad);
}

@keyframes cardIn {
  from { opacity: 0; transform: translateY(10px) scale(0.99); }
  to   { opacity: 1; transform: none; }
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 1.6rem;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 9px;
  color: #fff;
  background: var(--brand-grad);
  box-shadow: 0 4px 12px -2px var(--accent-ring);
  flex: none;
}

.brand-name {
  font-weight: 700;
  font-size: 1.02rem;
  letter-spacing: 0.01em;
  color: var(--text);
}

h1 { font-size: 1.4rem; margin: 0 0 0.4rem; letter-spacing: -0.01em; }
h2 {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  margin: 2rem 0 0.6rem;
  border-top: 1px solid var(--border);
  padding-top: 1.3rem;
}

.hint { color: var(--muted); font-size: 0.88rem; font-weight: normal; line-height: 1.5; }
h1 + .hint { margin-top: 0; }

label { display: block; margin: 1rem 0 0; font-size: 0.9rem; font-weight: 600; }

input[type="email"], input[type="password"], input[type="text"] {
  width: 100%;
  margin-top: 0.4rem;
  padding: 0.68rem 0.8rem;
  font-size: 1rem;
  color: var(--text);
  /* Force the glyph colour: some browsers (and autofill) otherwise paint typed
     text with their own low-contrast colour instead of `color`. */
  -webkit-text-fill-color: var(--text);
  caret-color: var(--accent);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--input-bg);
  box-shadow: var(--field-shadow);
  transition: border-color 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}
input::placeholder { color: var(--muted); opacity: 0.7; -webkit-text-fill-color: var(--muted); }
input:hover { border-color: var(--muted); }
input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-ring);
  background: var(--card);
}
/* Keep autofilled fields on-theme: the browser's yellow/blue autofill background
   and its text colour would otherwise be near-invisible in either theme. */
input:-webkit-autofill,
input:-webkit-autofill:hover,
input:-webkit-autofill:focus {
  -webkit-text-fill-color: var(--text);
  caret-color: var(--text);
  -webkit-box-shadow: 0 0 0 100px var(--input-bg) inset;
  box-shadow: 0 0 0 100px var(--input-bg) inset;
  transition: background-color 600000s 0s, color 600000s 0s;
}

.code-input {
  letter-spacing: 0.5em;
  font-size: 1.45rem;
  text-align: center;
  font-variant-numeric: tabular-nums;
  padding-left: 0.5em;
}

button {
  margin-top: 1.4rem;
  width: 100%;
  padding: 0.72rem;
  font-size: 0.98rem;
  font-weight: 600;
  color: #fff;
  background: var(--accent);
  background-image: var(--brand-grad);
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  box-shadow: 0 6px 16px -6px var(--accent-ring);
  transition: transform 0.12s ease, box-shadow 0.15s ease, filter 0.15s ease;
}
button:hover { filter: brightness(1.05); box-shadow: 0 10px 22px -6px var(--accent-ring); transform: translateY(-1px); }
button:active { transform: translateY(0); box-shadow: 0 4px 12px -6px var(--accent-ring); }
button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

button.secondary {
  background: transparent;
  background-image: none;
  color: var(--muted);
  border: 1px solid var(--border);
  box-shadow: none;
  width: auto;
  margin: 0;
  padding: 0.45rem 0.95rem;
  font-size: 0.85rem;
}
button.secondary:hover { color: var(--text); border-color: var(--muted); filter: none; transform: none; box-shadow: none; }

button.danger {
  background: transparent;
  background-image: none;
  color: var(--danger);
  border: 1px solid var(--border);
  box-shadow: none;
  width: auto;
  margin: 0;
  padding: 0.35rem 0.85rem;
  font-size: 0.85rem;
}
button.danger:hover { border-color: var(--danger); background: var(--danger-soft); filter: none; transform: none; box-shadow: none; }

.link-button {
  background: none;
  background-image: none;
  border: none;
  color: var(--accent);
  box-shadow: none;
  width: auto;
  padding: 0;
  margin-top: 1rem;
  font-size: 0.9rem;
  font-weight: 500;
  text-decoration: underline;
  text-underline-offset: 2px;
  cursor: pointer;
}
.link-button:hover { background: none; color: var(--accent-dark); filter: none; transform: none; box-shadow: none; }

.inline-form { display: inline; }

.alert {
  position: relative;
  padding: 0.75rem 0.9rem 0.75rem 1.05rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  line-height: 1.45;
  margin-bottom: 1.25rem;
  border: 1px solid transparent;
}
.alert::before {
  content: "";
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  border-radius: var(--radius-sm) 0 0 var(--radius-sm);
}
.alert-error { background: var(--danger-soft); color: var(--danger); border-color: color-mix(in srgb, var(--danger) 30%, transparent); }
.alert-error::before { background: var(--danger); }
.alert-ok { background: var(--ok-soft); color: var(--ok); border-color: color-mix(in srgb, var(--ok) 30%, transparent); }
.alert-ok::before { background: var(--ok); }

.links { font-size: 0.9rem; margin-top: 1.4rem; color: var(--muted); }
a { color: var(--accent); text-decoration: none; text-underline-offset: 2px; }
a:hover { text-decoration: underline; }

.account-header { display: flex; justify-content: space-between; align-items: center; gap: 1rem; }
.account-header h1 { margin: 0; }
.account-header form { margin: 0; }

.items { list-style: none; padding: 0; margin: 0.5rem 0; }
.items li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  padding: 0.8rem 0.6rem;
  margin: 0 -0.6rem;
  border-radius: var(--radius-sm);
  border-bottom: 1px solid var(--border);
  transition: background 0.15s ease;
}
.items li:hover { background: var(--accent-soft); }
.items li:last-child { border-bottom: none; }
.items .hint { display: block; margin-top: 0.15rem; }
.items form { margin: 0; }
.items strong { font-weight: 600; }

.badge {
  display: inline-block;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  padding: 0.12rem 0.5rem;
  border-radius: 99px;
  vertical-align: middle;
}

/* --- passkeys --- */
.passkey-button {
  background: transparent;
  background-image: none;
  color: var(--accent);
  border: 1px solid var(--accent);
  box-shadow: none;
  margin-top: 1rem;
  font-weight: 600;
}
.passkey-button:hover {
  filter: none;
  transform: translateY(-1px);
  background: var(--accent-soft);
  box-shadow: 0 6px 16px -8px var(--accent-ring);
}
.passkey-button:active { transform: translateY(0); }
.passkey-button[disabled] { opacity: 0.6; cursor: default; transform: none; }

.divider {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin: 1.4rem 0 0;
  color: var(--muted);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.divider::before, .divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--border);
}

.row-actions { display: flex; align-items: center; gap: 0.5rem; flex-wrap: wrap; justify-content: flex-end; }
.rename-form { display: flex; align-items: center; gap: 0.4rem; }
.rename-form input[type="text"] {
  width: 8.5rem;
  margin-top: 0;
  padding: 0.35rem 0.5rem;
  font-size: 0.85rem;
}
.passkey-error { color: var(--danger); margin-top: 0.75rem; }

footer {
  margin-top: 1.5rem;
  color: var(--muted);
  font-size: 0.8rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}
footer .footer-text { opacity: 0.85; }

.theme-toggle {
  background: transparent;
  background-image: none;
  color: var(--muted);
  border: 1px solid var(--border);
  box-shadow: none;
  width: auto;
  margin: 0;
  padding: 0.24rem 0.7rem;
  font-size: 0.76rem;
  font-weight: 500;
  border-radius: 99px;
  cursor: pointer;
}
.theme-toggle:hover {
  color: var(--text);
  border-color: var(--muted);
  background: var(--accent-soft);
  filter: none;
  transform: none;
  box-shadow: none;
}

@media (prefers-reduced-motion: reduce) {
  .card { animation: none; }
  * { transition: none !important; }
}