:root {
  --bg-1: #eef2ff;
  --bg-2: #fdf4ff;
  --bg-3: #ecfeff;
  --card: #ffffff;
  --text: #1e2235;
  --muted: #667085;
  --border: #e4e7f0;
  --field: #f8f9fc;
  --field-focus: #ffffff;
  --primary: #5b5bf0;
  --primary-2: #8b5cf6;
  --primary-soft: #eef0ff;
  --primary-text: #ffffff;
  --success: #16a34a;
  --success-soft: #dcfce7;
  --danger: #dc2626;
  --danger-soft: #fef2f2;
  --warning: #b45309;
  --warning-soft: #fffbeb;
  --ring: rgba(91, 91, 240, .25);
  --shadow: 0 1px 2px rgba(30, 34, 53, .04), 0 12px 32px rgba(76, 81, 191, .10);
  --radius: 20px;
  --mono: ui-monospace, SFMono-Regular, "Cascadia Mono", Menlo, Consolas, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg-1: #141729;
    --bg-2: #1b1530;
    --bg-3: #0f1d24;
    --card: #1c1f33;
    --text: #eceefa;
    --muted: #a3a9c2;
    --border: #2f3452;
    --field: #161a2c;
    --field-focus: #1a1e33;
    --primary: #7c7cff;
    --primary-2: #a78bfa;
    --primary-soft: #262a4d;
    --primary-text: #ffffff;
    --success: #4ade80;
    --success-soft: #173326;
    --danger: #f87171;
    --danger-soft: #3a1d22;
    --warning: #fbbf24;
    --warning-soft: #33290f;
    --ring: rgba(124, 124, 255, .35);
    --shadow: 0 12px 32px rgba(0, 0, 0, .35);
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  min-height: 100vh;
  color: var(--text);
  font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  background:
    radial-gradient(1200px 600px at 10% -10%, var(--bg-1), transparent 60%),
    radial-gradient(900px 500px at 100% 0%, var(--bg-2), transparent 60%),
    radial-gradient(900px 600px at 50% 110%, var(--bg-3), transparent 60%),
    var(--bg-1);
  background-attachment: fixed;
}
.page { max-width: 620px; margin: 0 auto; padding: 28px 16px 48px; }

/* Header */
.site-header { display: flex; justify-content: center; margin-bottom: 20px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; }
.brand-mark {
  display: grid; place-items: center;
  width: 38px; height: 38px; border-radius: 12px;
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  box-shadow: 0 6px 16px var(--ring);
}
.brand-name { font-size: 1.35rem; font-weight: 750; letter-spacing: -.01em; }

/* Card */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 32px;
}
h1 { font-size: 1.6rem; line-height: 1.25; letter-spacing: -.02em; margin: 0 0 8px; }
.lead { color: var(--muted); margin: 0 0 24px; }
.center { text-align: center; }
.hint { color: var(--muted); font-size: .875rem; margin: 10px 0 0; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* Fields */
.field { margin: 0 0 20px; padding: 0; border: 0; min-width: 0; }
.field-head { display: flex; justify-content: space-between; align-items: baseline; }
label, legend { display: block; font-weight: 650; font-size: .95rem; margin-bottom: 8px; padding: 0; }
.counter { color: var(--muted); font-size: .8rem; font-variant-numeric: tabular-nums; }
textarea, input[type=text] {
  width: 100%;
  font: inherit;
  color: var(--text);
  background: var(--field);
  border: 1.5px solid var(--border);
  border-radius: 14px;
  padding: 14px 16px;
  transition: border-color .15s, box-shadow .15s, background .15s;
}
textarea { resize: vertical; min-height: 120px; font-family: var(--mono); font-size: .95rem; }
textarea::placeholder { color: var(--muted); opacity: .8; font-family: system-ui, sans-serif; }
textarea:focus, input[type=text]:focus {
  outline: none;
  background: var(--field-focus);
  border-color: var(--primary);
  box-shadow: 0 0 0 4px var(--ring);
}

/* Expiry chips */
.chips { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
.chip { margin: 0; font-weight: 500; position: relative; }
.chip input { position: absolute; opacity: 0; pointer-events: none; }
.chip span {
  display: block; text-align: center;
  padding: 9px 6px; border-radius: 12px;
  border: 1.5px solid var(--border);
  background: var(--field);
  font-size: .9rem;
  cursor: pointer;
  transition: all .15s;
}
.chip:hover span { border-color: var(--primary); }
.chip input:checked + span {
  border-color: var(--primary);
  background: var(--primary-soft);
  color: var(--primary);
  font-weight: 650;
}
.chip input:focus-visible + span { box-shadow: 0 0 0 4px var(--ring); }

/* Password generator */
.generator {
  margin: 0 0 20px;
  border: 1.5px dashed var(--border);
  border-radius: 14px;
  padding: 12px 16px;
  background: color-mix(in srgb, var(--primary-soft) 40%, transparent);
}
.generator summary {
  display: flex; align-items: center; gap: 8px;
  cursor: pointer; font-weight: 600; color: var(--primary);
  list-style: none;
}
.generator summary::-webkit-details-marker { display: none; }
.generator summary::after { content: "+"; margin-left: auto; font-size: 1.2rem; line-height: 1; }
.generator[open] summary::after { content: "−"; }
.passwords { list-style: none; padding: 0; margin: 10px 0 12px; display: grid; grid-template-columns: repeat(auto-fill, minmax(170px, 1fr)); gap: 8px; }
.password {
  width: 100%;
  font: 500 .9rem var(--mono);
  color: var(--text);
  background: var(--card);
  border: 1.5px solid var(--border);
  border-radius: 10px;
  padding: 8px 10px;
  cursor: pointer;
  transition: border-color .15s, transform .1s;
}
.password:hover { border-color: var(--primary); }
.password:active { transform: scale(.98); }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font: inherit; font-weight: 650;
  border-radius: 14px;
  padding: 12px 20px;
  border: 1.5px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: transform .1s, box-shadow .15s, background .15s, filter .15s;
  white-space: nowrap;
}
.btn:focus-visible, .password:focus-visible, summary:focus-visible { outline: none; box-shadow: 0 0 0 4px var(--ring); }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: .6; cursor: default; transform: none; }
.btn-primary {
  color: var(--primary-text);
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  box-shadow: 0 6px 18px var(--ring);
}
.btn-primary:hover:not(:disabled) { filter: brightness(1.06); box-shadow: 0 8px 22px var(--ring); }
.btn-primary.copied { background: var(--success); box-shadow: none; }
.btn-ghost { color: var(--text); background: var(--card); border-color: var(--border); }
.btn-ghost:hover { border-color: var(--primary); color: var(--primary); }
.btn-danger-ghost { color: var(--danger); background: transparent; border-color: transparent; }
.btn-danger-ghost:hover { background: var(--danger-soft); }
.btn-small { padding: 7px 12px; font-size: .875rem; border-radius: 10px; }
.btn-block { width: 100%; padding: 15px 20px; font-size: 1.05rem; }
.actions { display: flex; flex-wrap: wrap; gap: 10px; margin: 20px 0 0; }
.actions.center { justify-content: center; }

/* Result link */
.link-box {
  display: flex; gap: 8px; padding: 6px;
  background: var(--field);
  border: 1.5px solid var(--border);
  border-radius: 16px;
}
.link-box input {
  flex: 1; min-width: 0;
  border: 0; background: transparent; box-shadow: none;
  font-family: var(--mono); font-size: .88rem;
  padding: 10px 10px;
}
.link-box input:focus { box-shadow: none; background: transparent; }
.link-box:focus-within { border-color: var(--primary); box-shadow: 0 0 0 4px var(--ring); }

/* Hero icons */
.hero-icon {
  display: grid; place-items: center;
  width: 64px; height: 64px; margin: 0 auto 16px;
  border-radius: 50%;
  color: var(--primary);
  background: var(--primary-soft);
}
.hero-icon.success { color: var(--success); background: var(--success-soft); animation: pop .35s ease-out; }
.hero-icon.muted { color: var(--muted); background: var(--field); }
@keyframes pop { from { transform: scale(.6); opacity: 0; } to { transform: scale(1); opacity: 1; } }

/* Alerts */
.alert { display: flex; gap: 10px; align-items: flex-start; border-radius: 12px; padding: 12px 14px; margin: 16px 0 0; font-size: .925rem; background: var(--field); }
.alert svg { flex: none; margin-top: 2px; }
.alert-error { color: var(--danger); background: var(--danger-soft); }
.alert-warning { color: var(--warning); background: var(--warning-soft); }
.alert-success { color: var(--success); background: var(--success-soft); }
[hidden] { display: none !important; }

/* Spinner */
.spinner {
  width: 36px; height: 36px; margin: 8px auto 16px;
  border-radius: 50%;
  border: 3px solid var(--primary-soft);
  border-top-color: var(--primary);
  animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* How it works */
.how { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 24px; }
.how-item { display: flex; gap: 10px; align-items: flex-start; font-size: .85rem; color: var(--muted); }
.how-item strong { display: block; color: var(--text); font-size: .875rem; margin-bottom: 2px; }
.how-item p { margin: 0; }
.how-icon {
  flex: none; display: grid; place-items: center;
  width: 34px; height: 34px; border-radius: 10px;
  color: var(--primary); background: var(--card);
  border: 1px solid var(--border);
}

/* Email notification */
.notify {
  margin: 0 0 20px;
  border: 1.5px solid var(--border);
  border-radius: 14px;
  padding: 14px 16px;
  background: var(--field);
}
.toggle { display: flex; align-items: center; gap: 12px; margin: 0; cursor: pointer; font-weight: 400; }
.toggle input { position: absolute; opacity: 0; pointer-events: none; }
.toggle-track {
  flex: none; position: relative;
  width: 44px; height: 26px; border-radius: 13px;
  background: var(--border);
  transition: background .15s;
}
.toggle-thumb {
  position: absolute; top: 3px; left: 3px;
  width: 20px; height: 20px; border-radius: 50%;
  background: #fff; box-shadow: 0 1px 3px rgba(0, 0, 0, .2);
  transition: transform .15s;
}
.toggle input:checked + .toggle-track { background: linear-gradient(135deg, var(--primary), var(--primary-2)); }
.toggle input:checked + .toggle-track .toggle-thumb { transform: translateX(18px); }
.toggle input:focus-visible + .toggle-track { box-shadow: 0 0 0 4px var(--ring); }
.toggle-text strong { display: block; font-weight: 650; }
.toggle-text small { color: var(--muted); font-size: .85rem; }
.notify-fields { margin-top: 16px; padding-top: 16px; border-top: 1px solid var(--border); }
.notify-fields .field { margin-bottom: 14px; }
.notify-fields input[type=email], .notify-fields input[type=text] { background: var(--card); }
input[type=email] {
  width: 100%; font: inherit; color: var(--text);
  border: 1.5px solid var(--border); border-radius: 14px; padding: 12px 16px;
  transition: border-color .15s, box-shadow .15s;
}
input[type=email]:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 4px var(--ring); }
.optional { font-weight: 400; color: var(--muted); font-size: .85rem; margin-left: 4px; }
.alert-info { color: var(--primary); background: var(--primary-soft); }

.noscript { text-align: center; color: var(--danger); }

@media (max-width: 560px) {
  .page { padding-top: 20px; }
  .card { padding: 22px 18px; }
  h1 { font-size: 1.35rem; }
  .chip span { font-size: .82rem; padding: 9px 2px; }
  .link-box { flex-direction: column; }
  .link-box .btn { width: 100%; }
  .how { grid-template-columns: 1fr; }
  .actions .btn { flex: 1; }
}
@media (max-width: 360px) {
  .chips { grid-template-columns: repeat(2, 1fr); }
}
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}