/* =====================================================================
   CHBS — Design tokens
   A graphite/ink console, not a Matrix cliché: warm amber "signal"
   accent for actions, cool teal for data, hairline borders throughout.
   ===================================================================== */

:root {
  --bg: #0A0D13;
  --bg-2: #0D111A;
  --surface: #121722;
  --surface-2: #171E2C;
  --surface-3: #1D2536;
  --border: #232C40;
  --border-strong: #313D57;

  --text: #E9ECF3;
  --text-muted: #9198AC;
  --text-faint: #626B82;

  --accent: #FFB84D;
  --accent-strong: #FFCE7A;
  --accent-ink: #241804;
  --accent-2: #5EEAD4;

  --rating-weak: #FF6B6B;
  --rating-fair: #FFB84D;
  --rating-strong: #5EEAD4;
  --rating-very-strong: #7CB8FF;
  --rating-excellent: #8DF29C;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, "JetBrains Mono", "SF Mono", "Cascadia Code", "Roboto Mono", Menlo, Consolas, monospace;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow-glow: 0 0 0 1px rgba(255, 184, 77, 0.18), 0 8px 30px -8px rgba(255, 184, 77, 0.25);
  --container: 760px;
}

[data-theme="light"] {
  --bg: #F3F2ED;
  --bg-2: #ECEAE2;
  --surface: #FFFFFF;
  --surface-2: #F7F6F1;
  --surface-3: #EFEDE5;
  --border: #DEDBCF;
  --border-strong: #C9C5B4;

  --text: #1A1D24;
  --text-muted: #5B6070;
  --text-faint: #8A8F9E;

  --accent-ink: #241804;
}

* { box-sizing: border-box; }
html { color-scheme: dark; }
[data-theme="light"] html, [data-theme="light"] { color-scheme: light; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

.skip-link {
  position: absolute; left: -999px; top: 0;
  background: var(--accent); color: var(--accent-ink); padding: 10px 16px;
  z-index: 100; border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

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

a { color: var(--accent-2); }

/* Faint grid texture behind everything */
.bg-grid {
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 56px 56px;
  opacity: 0.18;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 0%, black 20%, transparent 75%);
}

/* =====================================================================
   Header
   ===================================================================== */

.site-header {
  display: flex; align-items: center; justify-content: space-between;
  max-width: 1040px; margin: 0 auto; padding: 24px 24px 0;
}
.brand { display: flex; align-items: baseline; gap: 10px; }
.brand-mark {
  font-family: var(--font-mono); font-weight: 700; font-size: 1.15rem;
  letter-spacing: 0.06em; color: var(--accent);
}
.brand-sub { font-size: 0.8rem; color: var(--text-faint); letter-spacing: 0.02em; }
.site-nav { display: flex; align-items: center; gap: 22px; font-size: 0.88rem; }
.site-nav a { color: var(--text-muted); text-decoration: none; }
.site-nav a:hover { color: var(--text); }

.icon-btn {
  background: var(--surface); border: 1px solid var(--border); color: var(--text);
  width: 34px; height: 34px; border-radius: 50%; cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 1rem; transition: border-color 0.15s, transform 0.15s;
}
.icon-btn:hover { border-color: var(--accent); transform: translateY(-1px); }

/* =====================================================================
   Hero
   ===================================================================== */

.hero { max-width: var(--container); margin: 56px auto 40px; padding: 0 24px; text-align: center; }
.eyebrow {
  font-family: var(--font-mono); font-size: 0.75rem; color: var(--accent-2);
  letter-spacing: 0.08em; text-transform: uppercase; margin: 0 0 18px;
}
.hero h1 {
  font-size: clamp(1.7rem, 4vw, 2.5rem); font-weight: 650; line-height: 1.22;
  margin: 0 0 18px; letter-spacing: -0.01em;
}
.hero-sub { color: var(--text-muted); font-size: 1.02rem; max-width: 560px; margin: 0 auto; }
.hero-sub em { color: var(--text); font-style: normal; border-bottom: 1px dashed var(--border-strong); }

/* =====================================================================
   Generator card
   ===================================================================== */

.generator-card {
  max-width: var(--container); margin: 0 auto 48px; padding: 32px;
  background: linear-gradient(180deg, var(--surface), var(--surface) 60%, var(--surface-2));
  border: 1px solid var(--border); border-radius: var(--radius-lg);
  box-shadow: 0 30px 60px -30px rgba(0,0,0,0.6);
}

/* Structure preview: the signature element */
.structure-preview {
  display: flex; flex-wrap: wrap; gap: 6px; justify-content: center;
  margin-bottom: 18px; min-height: 26px;
}
.chip {
  font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.03em;
  padding: 3px 8px; border-radius: 5px; border: 1px solid var(--border-strong);
  color: var(--text-faint); background: var(--surface-2);
  animation: chip-in 0.35s ease both; animation-delay: var(--delay, 0ms);
}
.chip-W { color: var(--text-muted); border-color: var(--border-strong); }
.chip-N { color: var(--accent-2); border-color: rgba(94, 234, 212, 0.35); }
.chip-S { color: var(--text-faint); }
.chip-Y { color: var(--accent); border-color: rgba(255, 184, 77, 0.4); }

@keyframes chip-in {
  from { opacity: 0; transform: translateY(4px) scale(0.9); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.password-display {
  display: flex; align-items: center; gap: 12px;
  background: var(--bg-2); border: 1px solid var(--border-strong);
  border-radius: var(--radius-md); padding: 22px 20px; margin-bottom: 22px;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.02);
}
.password-text {
  flex: 1; font-family: var(--font-mono); font-size: clamp(1rem, 2.6vw, 1.4rem);
  font-weight: 600; letter-spacing: 0.01em; color: var(--text);
  word-break: break-all; background: none;
}
.password-text.pop { animation: pop 0.3s ease; }
@keyframes pop { 0% { opacity: 0.3; transform: scale(0.98); } 100% { opacity: 1; transform: scale(1); } }

.password-actions { display: flex; gap: 8px; flex-shrink: 0; }
.btn-icon {
  background: var(--surface-3); border: 1px solid var(--border-strong); color: var(--text);
  width: 40px; height: 40px; border-radius: var(--radius-sm); cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center;
  transition: border-color 0.15s, color 0.15s, transform 0.1s;
}
.btn-icon:hover:not(:disabled) { border-color: var(--accent); color: var(--accent); }
.btn-icon:active:not(:disabled) { transform: scale(0.94); }
.btn-icon:disabled { opacity: 0.4; cursor: not-allowed; }

.stats-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px;
  background: var(--border); border: 1px solid var(--border); border-radius: var(--radius-md);
  overflow: hidden; margin-bottom: 14px;
}
.stat { background: var(--surface); padding: 14px 12px; display: flex; flex-direction: column; gap: 4px; }
.stat-label { font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-faint); }
.stat-value { font-family: var(--font-mono); font-size: 1rem; font-weight: 600; }
.stat-rating .stat-value { color: var(--accent); }
.stat-rating[data-rating="weak"] .stat-value { color: var(--rating-weak); }
.stat-rating[data-rating="fair"] .stat-value { color: var(--rating-fair); }
.stat-rating[data-rating="strong"] .stat-value { color: var(--rating-strong); }
.stat-rating[data-rating="very-strong"] .stat-value { color: var(--rating-very-strong); }
.stat-rating[data-rating="excellent"] .stat-value { color: var(--rating-excellent); }

.strength-meter { margin-bottom: 20px; }
.strength-meter-track {
  height: 6px; background: var(--surface-3); border-radius: 4px; overflow: hidden;
  border: 1px solid var(--border);
}
.strength-meter-fill {
  height: 100%; width: 0%; border-radius: 4px; transition: width 0.5s cubic-bezier(.2,.8,.2,1), background 0.3s;
  background: var(--rating-fair);
}
.strength-meter-fill[data-rating="weak"] { background: var(--rating-weak); }
.strength-meter-fill[data-rating="fair"] { background: var(--rating-fair); }
.strength-meter-fill[data-rating="strong"] { background: var(--rating-strong); }
.strength-meter-fill[data-rating="very-strong"] { background: var(--rating-very-strong); }
.strength-meter-fill[data-rating="excellent"] { background: var(--rating-excellent); }

.suitable-block { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-bottom: 12px; }
.suitable-heading { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-faint); }
.suitable-for { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 6px; }
.suitable-for li {
  font-size: 0.76rem; color: var(--text-muted); background: var(--surface-2);
  border: 1px solid var(--border); padding: 3px 9px; border-radius: 999px;
}

.text-toggle {
  background: none; border: none; color: var(--accent-2); font-size: 0.8rem;
  cursor: pointer; padding: 4px 0; margin-bottom: 6px; text-decoration: underline dotted;
}
.entropy-breakdown { list-style: none; margin: 0 0 18px; padding: 10px 12px; background: var(--bg-2); border: 1px solid var(--border); border-radius: var(--radius-sm); font-size: 0.78rem; }
.entropy-breakdown li { display: flex; flex-wrap: wrap; gap: 4px 10px; padding: 5px 0; border-bottom: 1px dashed var(--border); }
.entropy-breakdown li:last-child { border-bottom: none; }
.eb-label { color: var(--text); flex: 1; min-width: 160px; }
.eb-bits { font-family: var(--font-mono); color: var(--accent-2); }
.eb-detail { width: 100%; color: var(--text-faint); font-family: var(--font-mono); font-size: 0.72rem; }

.primary-actions { display: flex; flex-direction: column; align-items: center; gap: 16px; margin-top: 6px; }
.btn-generate {
  position: relative; font-family: var(--font-sans); font-weight: 650; font-size: 1.05rem;
  color: var(--accent-ink); background: linear-gradient(180deg, var(--accent-strong), var(--accent));
  border: none; padding: 16px 40px; border-radius: 999px; cursor: pointer;
  box-shadow: var(--shadow-glow); transition: transform 0.12s, box-shadow 0.2s;
  width: 100%; max-width: 360px;
}
.btn-generate:hover { transform: translateY(-1px); box-shadow: 0 0 0 1px rgba(255,184,77,0.3), 0 14px 34px -10px rgba(255,184,77,0.4); }
.btn-generate:active { transform: translateY(0) scale(0.99); }
.kbd-hint {
  position: absolute; right: 14px; top: 50%; transform: translateY(-50%);
  font-family: var(--font-mono); font-size: 0.7rem; background: rgba(0,0,0,0.18);
  padding: 2px 6px; border-radius: 4px; opacity: 0.7;
}

.mode-select { display: flex; flex-direction: column; align-items: center; gap: 8px; margin-top: 4px; }
.mode-select-label { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--text-faint); }
.mode-select-label small { text-transform: none; letter-spacing: 0; color: var(--text-faint); opacity: 0.85; }
.quick-modes { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; }
.chip-btn {
  background: var(--surface-2); border: 1px solid var(--border-strong); color: var(--text-muted);
  padding: 7px 14px; border-radius: 999px; font-size: 0.8rem; cursor: pointer;
  transition: border-color 0.15s, color 0.15s, background 0.15s;
}
.chip-btn:hover { border-color: var(--accent-2); color: var(--text); }
.chip-btn.is-active { border-color: var(--accent); color: var(--accent-ink); background: var(--accent); font-weight: 600; }

.multi-results { margin-top: 22px; border-top: 1px solid var(--border); padding-top: 16px; }
.multi-heading { font-size: 0.78rem; color: var(--text-faint); text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 10px; }
.multi-row {
  display: flex; align-items: center; gap: 10px; padding: 8px 10px;
  border: 1px solid var(--border); border-radius: var(--radius-sm); margin-bottom: 6px;
  background: var(--bg-2);
}
.multi-row code { flex: 1; font-family: var(--font-mono); font-size: 0.88rem; word-break: break-all; }
.multi-entropy { font-size: 0.7rem; color: var(--text-faint); white-space: nowrap; }
.multi-entropy[data-rating="weak"] { color: var(--rating-weak); }
.multi-entropy[data-rating="fair"] { color: var(--rating-fair); }
.multi-entropy[data-rating="strong"] { color: var(--rating-strong); }
.multi-entropy[data-rating="very-strong"] { color: var(--rating-very-strong); }
.multi-entropy[data-rating="excellent"] { color: var(--rating-excellent); }

.btn-tiny {
  background: var(--surface-3); border: 1px solid var(--border-strong); color: var(--text);
  font-size: 0.72rem; padding: 5px 10px; border-radius: 5px; cursor: pointer;
}
.btn-tiny:hover { border-color: var(--accent); }
.btn-tiny-ghost { background: none; color: var(--text-faint); }

/* =====================================================================
   Advanced settings
   ===================================================================== */

.advanced-settings { max-width: var(--container); margin: 0 auto 48px; padding: 0 24px; }
.accordion-toggle {
  width: 100%; display: flex; align-items: center; justify-content: space-between;
  background: var(--surface); border: 1px solid var(--border); color: var(--text);
  padding: 16px 20px; border-radius: var(--radius-md); font-size: 1rem; font-weight: 600;
  cursor: pointer;
}
.accordion-toggle .chevron { transition: transform 0.2s; color: var(--text-faint); }
.accordion-toggle.is-open .chevron { transform: rotate(180deg); }

.accordion-panel { padding: 20px 2px 0; display: grid; gap: 16px; }

.settings-group {
  border: 1px solid var(--border); border-radius: var(--radius-md); padding: 16px 18px 18px;
  background: var(--surface); position: relative;
}
.settings-group legend {
  font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.07em; color: var(--text-faint);
  padding: 0 6px;
}
.settings-group.is-locked { opacity: 0.45; }
.settings-warning { font-size: 0.78rem; color: var(--accent); margin: 8px 0 0; }

.switch-row {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 10px 0; cursor: pointer;
}
.switch-row small { display: block; color: var(--text-faint); font-size: 0.74rem; margin-top: 2px; font-weight: 400; }
.switch-row input[type="checkbox"] { position: absolute; opacity: 0; width: 0; height: 0; }
.switch {
  width: 40px; height: 22px; border-radius: 999px; background: var(--surface-3);
  border: 1px solid var(--border-strong); position: relative; flex-shrink: 0; transition: background 0.2s;
}
.switch::after {
  content: ''; position: absolute; top: 2px; left: 2px; width: 16px; height: 16px;
  border-radius: 50%; background: var(--text-faint); transition: transform 0.2s, background 0.2s;
}
.switch-row input:checked + .switch { background: rgba(255, 184, 77, 0.18); border-color: var(--accent); }
.switch-row input:checked + .switch::after { transform: translateX(18px); background: var(--accent); }

.field-row { display: block; padding: 10px 0; }
.field-row > span { display: block; font-size: 0.85rem; color: var(--text-muted); margin-bottom: 6px; }
.field-row input[type="range"] { width: 100%; accent-color: var(--accent); }
.field-row input[type="number"], .field-row select, #quantityInput {
  width: 100%; background: var(--bg-2); border: 1px solid var(--border-strong); color: var(--text);
  padding: 9px 10px; border-radius: var(--radius-sm); font-family: var(--font-sans); font-size: 0.88rem;
}

.radio-row { display: flex; align-items: center; gap: 10px; padding: 8px 0; font-size: 0.88rem; color: var(--text-muted); cursor: pointer; }
.radio-row input { accent-color: var(--accent); width: 16px; height: 16px; }

.field-note { font-size: 0.78rem; color: var(--text-faint); margin: 8px 0 0; }

textarea#customWordlistTextarea {
  width: 100%; background: var(--bg-2); border: 1px solid var(--border-strong); color: var(--text);
  border-radius: var(--radius-sm); padding: 10px; font-family: var(--font-mono); font-size: 0.82rem; resize: vertical;
  margin-top: 10px;
}
.row-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 12px; align-items: center; }
.btn-secondary {
  background: var(--surface-3); border: 1px solid var(--border-strong); color: var(--text);
  padding: 9px 16px; border-radius: var(--radius-sm); font-size: 0.85rem; cursor: pointer;
}
.btn-secondary:hover { border-color: var(--accent); }
.btn-ghost { background: none; color: var(--text-muted); }
.file-btn {
  background: var(--surface-3); border: 1px solid var(--border-strong); color: var(--text);
  padding: 9px 16px; border-radius: var(--radius-sm); font-size: 0.85rem; cursor: pointer;
}
.file-btn:hover { border-color: var(--accent); }

.pill {
  font-size: 0.62rem; text-transform: uppercase; letter-spacing: 0.05em;
  background: rgba(94, 234, 212, 0.12); color: var(--accent-2); border: 1px solid rgba(94, 234, 212, 0.3);
  padding: 2px 7px; border-radius: 999px; margin-left: 6px; vertical-align: middle;
}

.settings-footer { justify-content: flex-end; }

/* =====================================================================
   History
   ===================================================================== */

.history-section { max-width: var(--container); margin: 0 auto 48px; padding: 0 24px; }
.section-heading-row { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; flex-wrap: wrap; gap: 10px; }
.section-heading-row h2 { font-size: 1.1rem; margin: 0; }
.history-list { display: grid; gap: 6px; }
.history-row {
  display: flex; align-items: center; gap: 10px; padding: 10px 12px;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-sm);
  flex-wrap: wrap;
}
.history-row code { flex: 1; font-family: var(--font-mono); font-size: 0.85rem; min-width: 160px; word-break: break-all; }
.history-meta { font-size: 0.7rem; color: var(--text-faint); white-space: nowrap; }
.history-meta[data-rating="weak"] { color: var(--rating-weak); }
.history-meta[data-rating="fair"] { color: var(--rating-fair); }
.history-meta[data-rating="strong"] { color: var(--rating-strong); }
.history-meta[data-rating="very-strong"] { color: var(--rating-very-strong); }
.history-meta[data-rating="excellent"] { color: var(--rating-excellent); }
.history-date { font-size: 0.7rem; color: var(--text-faint); white-space: nowrap; }

/* =====================================================================
   About + footer
   ===================================================================== */

.about-section { max-width: var(--container); margin: 0 auto 60px; padding: 0 24px; color: var(--text-muted); }
.about-section h2 { color: var(--text); font-size: 1.2rem; margin-bottom: 10px; }
.about-section h3 { color: var(--text); font-size: 0.95rem; margin: 24px 0 8px; }
.about-section code { font-family: var(--font-mono); background: var(--surface-2); padding: 1px 6px; border-radius: 4px; font-size: 0.85em; }
.about-section p { font-size: 0.92rem; }

.site-footer {
  text-align: center; padding: 30px 24px 50px; color: var(--text-faint); font-size: 0.8rem;
  border-top: 1px solid var(--border); max-width: 1040px; margin: 0 auto;
}
.site-footer p { margin: 6px 0; }
.footer-credit { font-size: 0.76rem; }
.footer-credit a { color: var(--text-muted); text-decoration: none; border-bottom: 1px dotted var(--border-strong); }
.footer-credit a:hover { color: var(--accent); border-color: var(--accent); }

/* =====================================================================
   QR modal
   ===================================================================== */

.qr-modal { border: 1px solid var(--border-strong); border-radius: var(--radius-lg); background: var(--surface); color: var(--text); padding: 0; }
.qr-modal::backdrop { background: rgba(6, 8, 12, 0.72); backdrop-filter: blur(2px); }
.qr-modal-inner { padding: 28px 28px 24px; text-align: center; position: relative; width: 320px; max-width: 84vw; }
.qr-modal-inner h3 { margin: 0 0 16px; font-size: 1rem; }
.qr-modal canvas { border-radius: var(--radius-sm); border: 1px solid var(--border); width: 100%; height: auto; }
.qr-password-label { display: block; margin-top: 14px; font-family: var(--font-mono); font-size: 0.8rem; word-break: break-all; color: var(--text-muted); }
.qr-close { position: absolute; top: 14px; right: 14px; }

/* =====================================================================
   Toast
   ===================================================================== */

.toast {
  position: fixed; left: 50%; bottom: 26px; transform: translate(-50%, 16px);
  background: var(--surface-3); border: 1px solid var(--border-strong); color: var(--text);
  padding: 11px 20px; border-radius: 999px; font-size: 0.85rem;
  opacity: 0; pointer-events: none; transition: opacity 0.2s, transform 0.2s;
  z-index: 200; box-shadow: 0 10px 30px -8px rgba(0,0,0,0.5);
}
.toast.visible { opacity: 1; transform: translate(-50%, 0); }

/* =====================================================================
   Responsive
   ===================================================================== */

@media (max-width: 640px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .generator-card { padding: 22px 18px; }
  .site-header { flex-direction: row; }
  .site-nav { gap: 14px; }
  .hero { margin: 36px auto 30px; }
}