/* Moving: register. Calm, mobile-first, light and dark. */
:root {
  color-scheme: light dark;
  --font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;

  --bg: #f6f5f2;
  --surface: #ffffff;
  --surface-2: #f1efea;
  --border: #e2ded6;
  --border-strong: #c9c3b8;
  --text: #1d1c1a;
  --text-2: #57534c;
  --text-3: #6f6a62;
  --accent: #2f5d50;
  --accent-hover: #24493f;
  --accent-text: #ffffff;
  --accent-soft: #e3eee9;
  --focus: #2f6fd6;
  --danger: #a3352b;
  --danger-soft: #f8e7e4;
  --success: #2b6e48;
  --success-soft: #e2f1e8;
  --warn: #8a5a00;
  --s0: #b8b2a7;
  --s1: #c2412d;
  --s2: #c07a12;
  --s3: #3c8a5c;
  --s4: #2f6d4f;

  --radius: 14px;
  --radius-sm: 10px;
  --shadow: 0 1px 2px rgb(29 28 26 / 0.04), 0 8px 24px -12px rgb(29 28 26 / 0.12);
  --space: clamp(16px, 4vw, 28px);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141513;
    --surface: #1c1d1b;
    --surface-2: #232521;
    --border: #2e302c;
    --border-strong: #454841;
    --text: #ecebe6;
    --text-2: #b7b4ab;
    --text-3: #9c998f;
    --accent: #8fc7b2;
    --accent-hover: #a7d6c4;
    --accent-text: #0f1f1a;
    --accent-soft: #1f2f29;
    --focus: #7fb0ff;
    --danger: #f08b7f;
    --danger-soft: #3a211e;
    --success: #8fd1a8;
    --success-soft: #1d3326;
    --warn: #e4b55c;
    --s0: #55574f;
    --s1: #e0705f;
    --s2: #e0a64a;
    --s3: #79c597;
    --s4: #8fd1a8;
    --shadow: 0 1px 2px rgb(0 0 0 / 0.3), 0 8px 24px -12px rgb(0 0 0 / 0.5);
  }
}

*, *::before, *::after { box-sizing: border-box; }

[hidden] { display: none !important; }

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

body {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-underline-offset: 0.18em; }
a:hover { color: var(--accent-hover); }

:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; border-radius: 4px; }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

.skip-link {
  position: absolute; left: 12px; top: -60px; z-index: 10;
  background: var(--surface); color: var(--text); padding: 10px 14px; border-radius: var(--radius-sm);
  box-shadow: var(--shadow);
}
.skip-link:focus { top: 12px; }

/* Header and footer */
.site-header { padding: 18px var(--space); }
.site-header-inner, .site-footer > div, .page { width: 100%; max-width: 1080px; margin-inline: auto; }
.site-header-inner.narrow, .site-footer > .narrow, .page.narrow { max-width: 520px; }
.site-header-inner { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 650; letter-spacing: -0.01em; font-size: 1.05rem; }
.brand-mark { width: 28px; height: 28px; }
.brand-mark-bg { fill: var(--accent); }
.brand-mark-fg { fill: none; stroke: var(--accent-text); stroke-width: 2.6; stroke-linecap: round; stroke-linejoin: round; }
.who { color: var(--text-2); font-size: 0.9rem; }

.page { flex: 1; padding: 8px var(--space) 40px; outline: none; }
.site-footer { padding: 24px var(--space) 32px; color: var(--text-3); font-size: 0.875rem; }

/* Cards */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: clamp(20px, 5vw, 36px);
  box-shadow: var(--shadow);
}
.card-center { text-align: center; }
.card-center .button { margin-top: 8px; }

h1, h2 { line-height: 1.2; letter-spacing: -0.02em; margin: 0 0 8px; }
h1 { font-size: clamp(1.6rem, 1.3rem + 1.4vw, 2rem); font-weight: 680; }
h2 { font-size: 1.15rem; font-weight: 650; }
p { margin: 0 0 12px; }
.lede { color: var(--text-2); font-size: 1.05rem; }
.eyebrow { color: var(--accent); font-weight: 600; font-size: 0.85rem; letter-spacing: 0.04em; text-transform: uppercase; margin-bottom: 6px; }
.muted { color: var(--text-3); }
.mono { font-family: var(--mono); font-size: 0.9em; }

.invite-note {
  background: var(--surface-2); border-radius: var(--radius-sm); padding: 12px 14px; color: var(--text-2);
  border-left: 3px solid var(--accent);
}

/* Forms */
.form { display: grid; gap: 20px; margin-top: 24px; }
.field { display: grid; gap: 6px; }
.field label { font-weight: 600; }
.optional { color: var(--text-3); font-weight: 400; }
.hint { color: var(--text-3); font-size: 0.875rem; margin: 0; }
.error { color: var(--danger); font-size: 0.9rem; font-weight: 550; margin: 0; }

input[type="text"], input[type="email"], input[type="password"], input[type="number"] {
  width: 100%;
  min-height: 48px;
  padding: 11px 14px;
  font: inherit;
  font-size: 1rem; /* 16px avoids iOS zoom on focus */
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  transition: border-color 120ms ease, box-shadow 120ms ease;
}
input:hover { border-color: var(--text-3); }
input:focus-visible { outline: none; border-color: var(--focus); box-shadow: 0 0 0 3px color-mix(in srgb, var(--focus) 35%, transparent); }
.has-error input { border-color: var(--danger); }
input[readonly] { background: var(--surface-2); }

/* Password strength */
.strength { display: grid; gap: 6px; }
.strength-bar { display: grid; grid-template-columns: repeat(4, 1fr); gap: 6px; }
.strength-bar span { height: 6px; border-radius: 3px; background: var(--border); transition: background-color 160ms ease; }
.strength-label { margin: 0; font-size: 0.875rem; color: var(--text-2); min-height: 1.4em; }
.strength[data-score="0"] .strength-bar span:nth-child(-n+1) { background: var(--s1); }
.strength[data-score="1"] .strength-bar span:nth-child(-n+1) { background: var(--s1); }
.strength[data-score="2"] .strength-bar span:nth-child(-n+2) { background: var(--s2); }
.strength[data-score="3"] .strength-bar span:nth-child(-n+3) { background: var(--s3); }
.strength[data-score="4"] .strength-bar span { background: var(--s4); }
.match-hint[data-state="ok"] { color: var(--success); }
.match-hint[data-state="bad"] { color: var(--text-2); }

/* Buttons */
.button {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 48px; padding: 10px 20px;
  font: inherit; font-weight: 600; text-decoration: none;
  color: var(--text); background: var(--surface);
  border: 1px solid var(--border-strong); border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background-color 120ms ease, border-color 120ms ease, transform 80ms ease;
}
.button:hover { background: var(--surface-2); color: var(--text); }
.button:active { transform: translateY(1px); }
.button:disabled { opacity: 0.65; cursor: progress; }
.button-primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
.button-primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); color: var(--accent-text); }
.button-danger { color: var(--danger); }
.button-danger:hover { background: var(--danger-soft); color: var(--danger); border-color: var(--danger); }
.button-small { min-height: 44px; padding: 8px 14px; font-size: 0.9rem; }
.button-block { width: 100%; }

/* Alerts */
.alert {
  border-radius: var(--radius-sm); padding: 14px 16px; margin: 16px 0; border: 1px solid transparent; outline: none;
}
.alert-title { font-size: 1rem; margin-bottom: 4px; }
.alert ul { margin: 6px 0 0; padding-left: 20px; }
.alert-error { background: var(--danger-soft); border-color: color-mix(in srgb, var(--danger) 35%, transparent); color: var(--text); }
.alert-error a { color: var(--danger); }
.alert-success { background: var(--success-soft); border-color: color-mix(in srgb, var(--success) 35%, transparent); }
.alert p:last-child { margin-bottom: 0; }

.success-icon {
  width: 56px; height: 56px; margin: 0 auto 16px; border-radius: 50%;
  display: grid; place-items: center; background: var(--success-soft);
}
.success-icon svg { width: 28px; height: 28px; fill: none; stroke: var(--success); stroke-width: 2.5; stroke-linecap: round; stroke-linejoin: round; }

/* Admin */
.admin-head { margin: 8px 0 8px; }
.admin-grid { display: grid; gap: 20px; margin-top: 16px; }
.card .form { margin-top: 12px; }
.empty { color: var(--text-3); margin: 8px 0 0; }

.list { list-style: none; margin: 12px 0 0; padding: 0; }
.list-item {
  display: flex; flex-wrap: wrap; align-items: flex-start; justify-content: space-between; gap: 12px;
  padding: 14px 0; border-top: 1px solid var(--border);
}
.list-item:first-child { border-top: 0; padding-top: 4px; }
.list-main { flex: 1 1 260px; min-width: 0; display: grid; gap: 6px; }
.list-title { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; overflow-wrap: anywhere; }
.list-meta { display: flex; flex-wrap: wrap; gap: 4px 14px; color: var(--text-3); font-size: 0.875rem; overflow-wrap: anywhere; }
.list-action { flex: 0 0 auto; margin: 0; }

.copy-row { display: flex; gap: 8px; align-items: stretch; }
.copy-row input { min-height: 44px; font-size: 0.85rem; flex: 1; min-width: 0; }
.new-link .copy-row { margin-top: 8px; }

.badge {
  display: inline-flex; align-items: center; padding: 2px 9px; border-radius: 999px;
  font-size: 0.78rem; font-weight: 650; letter-spacing: 0.01em; border: 1px solid transparent;
}
.badge-open { background: var(--success-soft); color: var(--success); }
.badge-pending { background: var(--accent-soft); color: var(--accent); }
.badge-used { background: var(--surface-2); color: var(--text-2); border-color: var(--border); }
.badge-expired { background: var(--surface-2); color: var(--warn); border-color: var(--border); }
.badge-revoked { background: var(--danger-soft); color: var(--danger); }

@media (min-width: 900px) {
  .admin-grid { grid-template-columns: minmax(300px, 380px) 1fr; align-items: start; }
  .card-wide { grid-column: 1 / -1; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; }
}

@media (forced-colors: active) {
  .strength-bar span { border: 1px solid CanvasText; }
  .badge { border-color: CanvasText; }
}