/* ==========================================================================
   PasswordGeneratorPro — design tokens
   Concept: cool, clinical light canvas (distinct from site 1's warm paper
   and site 2's dark canvas). The generated password itself is the hero,
   set in a monospace display face because a password IS a monospace
   string -- functional, not decorative. Mono + Sans share one type
   superfamily (IBM Plex) for cohesion between the two functional roles.
   ========================================================================== */

:root {
  --bg: #eef1f1;
  --surface: #ffffff;
  --surface-2: #e4e8e8;
  --ink: #16211f;
  --ink-dim: #4c5a57;
  --ink-faint: #7c8985;
  --line: #d2d9d8;
  --line-strong: #b3bcba;

  --secure: #0e7a6b;
  --secure-bg: #dcf0ec;
  --weak: #b23b32;
  --weak-bg: #f6dfdc;
  --mid: #a3781a;
  --mid-bg: #f3e7ce;

  --display: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;
  --sans: "IBM Plex Sans", -apple-system, "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;

  --max: 780px;
  --max-wide: 1080px;
  --radius: 6px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--ink); }
a:hover { color: var(--secure); }

.wrap { max-width: var(--max-wide); margin: 0 auto; padding: 0 24px; }
.wrap-narrow { max-width: var(--max); margin: 0 auto; padding: 0 24px; }

h1, h2, h3 { font-family: var(--sans); font-weight: 600; line-height: 1.2; margin: 0 0 0.5em; color: var(--ink); }
h1 { font-size: clamp(1.7rem, 3.6vw, 2.4rem); letter-spacing: -0.01em; }
h2 { font-size: clamp(1.3rem, 2.4vw, 1.6rem); }
h3 { font-size: 1.02rem; }
p { max-width: 68ch; color: var(--ink-dim); }
p.lede { font-size: 1.05rem; max-width: 58ch; }

/* -------------------------------------------------- header -------------------------------------------------- */

.site-header { border-bottom: 1px solid var(--line); padding: 18px 0; background: var(--surface); }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.wordmark { font-family: var(--sans); font-size: 1.1rem; font-weight: 600; color: var(--ink); text-decoration: none; }
.wordmark .lock { color: var(--secure); }
.site-nav { display: flex; gap: 22px; font-size: 0.9rem; }
.site-nav a { color: var(--ink-dim); text-decoration: none; }
.site-nav a:hover { color: var(--secure); }

/* -------------------------------------------------- entry -------------------------------------------------- */

.entry { padding: 36px 0 6px; }
.entry-label { font-family: var(--mono); font-size: 0.78rem; color: var(--ink-faint); margin: 0 0 6px; }

/* -------------------------------------------------- password display -------------------------------------------------- */

.pw-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 26px;
  margin: 20px 0;
}

.pw-display {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 18px;
  margin-bottom: 16px;
}
.pw-output {
  font-family: var(--display);
  font-size: clamp(1.15rem, 3.6vw, 1.7rem);
  font-weight: 500;
  letter-spacing: 0.01em;
  word-break: break-all;
  flex: 1;
}
.pw-actions { display: flex; gap: 8px; flex-shrink: 0; }

.icon-btn {
  width: 40px; height: 40px;
  border-radius: var(--radius);
  border: 1px solid var(--line-strong);
  background: var(--surface);
  color: var(--ink-dim);
  cursor: pointer;
  font-size: 1rem;
  display: flex; align-items: center; justify-content: center;
}
.icon-btn:hover { border-color: var(--secure); color: var(--secure); }

.strength-row { display: flex; align-items: center; gap: 12px; margin-bottom: 4px; }
.strength-bar { flex: 1; height: 8px; border-radius: 4px; background: var(--surface-2); overflow: hidden; }
.strength-fill { height: 100%; border-radius: 4px; transition: width 0.15s ease; }
.strength-label { font-family: var(--mono); font-size: 0.82rem; white-space: nowrap; }
.strength-bits { font-family: var(--mono); font-size: 0.76rem; color: var(--ink-faint); margin-top: 4px; }

/* -------------------------------------------------- controls -------------------------------------------------- */

.mode-tabs { display: flex; gap: 6px; margin-bottom: 18px; flex-wrap: wrap; }
.tab {
  font-family: var(--sans);
  font-size: 0.86rem;
  padding: 7px 14px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  background: var(--surface);
  color: var(--ink-dim);
  cursor: pointer;
}
.tab[aria-pressed="true"] { background: var(--ink); color: var(--surface); border-color: var(--ink); }

.control-row { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 14px; }
.control-row label { font-size: 0.9rem; color: var(--ink); }
.control-row .value { font-family: var(--mono); font-size: 0.85rem; color: var(--ink-dim); }

input[type="range"] { width: 100%; accent-color: var(--secure); }

.toggle-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; margin-bottom: 14px; }
@media (max-width: 520px) { .toggle-grid { grid-template-columns: 1fr; } }
.toggle {
  display: flex; align-items: center; gap: 9px;
  font-size: 0.88rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 10px 12px;
  cursor: pointer;
  background: var(--surface);
}
.toggle input { accent-color: var(--secure); width: 16px; height: 16px; }

.advanced-details { margin-top: 10px; border-top: 1px dashed var(--line-strong); padding-top: 12px; }
.advanced-details summary { cursor: pointer; font-size: 0.88rem; font-weight: 600; color: var(--secure); list-style: none; }
.advanced-details summary::-webkit-details-marker { display: none; }
.advanced-details summary::before { content: "+ "; }
.advanced-details[open] summary::before { content: "\2212 "; }
.advanced-body { margin-top: 12px; }

input[type="text"], input[type="number"], input[type="password"] {
  font-family: var(--sans);
  font-size: 0.92rem;
  padding: 8px 10px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--ink);
  width: 100%;
}
input:focus { outline: 2px solid var(--secure); outline-offset: 1px; }

.btn {
  font-family: var(--sans);
  font-size: 0.94rem;
  font-weight: 600;
  padding: 11px 20px;
  border-radius: var(--radius);
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--surface);
  cursor: pointer;
}
.btn:hover { opacity: 0.9; }
.btn-ghost { background: transparent; color: var(--ink); border: 1px solid var(--line-strong); }
.btn-ghost:hover { border-color: var(--secure); color: var(--secure); }
.btn-sm { padding: 7px 13px; font-size: 0.82rem; }

/* -------------------------------------------------- bulk & checker -------------------------------------------------- */

.bulk-section, .checker-section { margin: 36px 0; }
.bulk-list {
  font-family: var(--mono);
  font-size: 0.88rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  max-height: 260px;
  overflow-y: auto;
}
.bulk-row { display: flex; align-items: center; justify-content: space-between; padding: 8px 12px; border-bottom: 1px solid var(--line); }
.bulk-row:last-child { border-bottom: none; }
.bulk-row button { background: none; border: none; color: var(--ink-faint); cursor: pointer; font-size: 0.8rem; }
.bulk-row button:hover { color: var(--secure); }

.checker-input-row { display: flex; gap: 10px; margin-bottom: 12px; }

/* -------------------------------------------------- article / faq -------------------------------------------------- */

.section { padding: 42px 0; border-top: 1px solid var(--line); }
.section.tight { padding: 28px 0; }
.faq-item { margin-bottom: 20px; max-width: 68ch; }
.faq-item h3 { margin-bottom: 6px; font-size: 1rem; }
.faq-item p { margin: 0; }

.browse-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 10px; }
.browse-grid a {
  display: block; padding: 12px 14px; border: 1px solid var(--line);
  border-radius: var(--radius); text-decoration: none; color: var(--ink); font-size: 0.88rem;
  background: var(--surface);
}
.browse-grid a:hover { border-color: var(--secure); }

footer { border-top: 1px solid var(--line); padding: 30px 0 44px; font-size: 0.82rem; color: var(--ink-faint); background: var(--surface); }
footer .wrap { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; }
footer a { color: var(--ink-faint); }
footer a:hover { color: var(--secure); }

.trust-strip {
  font-size: 0.82rem;
  color: var(--ink-dim);
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  margin-top: 12px;
}
.trust-strip span { display: flex; align-items: center; gap: 6px; }
.trust-strip .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--secure); }

.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; }

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