:root {
  color-scheme: light;
  /* Brand tokens */
  --ft-black: #000000;
  --ft-white: #F6F6F6;
  --ft-green: #C4E04F;
  --ft-green-dark: #39B224;
  --ft-blue: #1869EA;
  --ft-red: #C8432D;
  --ft-yellow: #F6CE4E;
  --ft-purple: #8C70F0;
  --ft-gray: #888888;
  --ft-gray-dark: #4D4D4D;
  --ft-gray-light: #C3C3C3;
  --ft-off-white: #F2F2F9;
  --ft-font-headline: 'Inter', 'Helvetica Neue', Arial, sans-serif;
  --ft-font-mono: 'Roboto Mono', 'Courier New', monospace;

  /* Theme tokens (flipped under [data-theme="dark"]) */
  --bg-page: var(--ft-off-white);
  --bg-surface: var(--ft-white);
  --bg-input: var(--ft-off-white);
  --bg-input-focus: var(--ft-white);
  --text-primary: var(--ft-black);
  --text-secondary: var(--ft-gray-dark);
  --border: var(--ft-gray-light);
  --border-subtle: var(--ft-off-white);
  --focus-border: var(--ft-black);
  --btn-primary-bg: var(--ft-black);
  --btn-primary-fg: var(--ft-white);
  --btn-primary-hover: var(--ft-gray-dark);
  --code-bg: var(--ft-off-white);
}

[data-theme="dark"] {
  color-scheme: dark;
  --bg-page: #0d0d0d;
  --bg-surface: #1a1a1a;
  --bg-input: #1f1f1f;
  --bg-input-focus: #232323;
  --text-primary: var(--ft-white);
  --text-secondary: #B0B0B0;
  --border: #2c2c2c;
  --border-subtle: #1f1f1f;
  --focus-border: var(--ft-green);
  --btn-primary-bg: var(--ft-white);
  --btn-primary-fg: var(--ft-black);
  --btn-primary-hover: #DADADA;
  --code-bg: #232323;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { min-height: 100%; }
body {
  font-family: var(--ft-font-headline);
  background: var(--bg-page);
  color: var(--text-primary);
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
  transition: background-color 0.15s, color 0.15s;
}

/* ---------- Header ---------- */

.header {
  background: var(--ft-black);
  color: var(--ft-white);
  border-bottom: 4px solid var(--ft-green);
}
.header-inner {
  max-width: 800px;
  margin: 0 auto;
  padding: calc(1.25rem + env(safe-area-inset-top)) calc(1.5rem + env(safe-area-inset-right)) 1.25rem calc(1.5rem + env(safe-area-inset-left));
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
}
.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.brand-logo {
  height: 40px;
  width: auto;
  object-fit: contain;
}
.brand-text {
  font-weight: 900;
  font-size: 1.1rem;
  letter-spacing: -0.01em;
}
.brand-tag {
  font-family: var(--ft-font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ft-gray-light);
}
.theme-toggle {
  background: rgba(255, 255, 255, 0.08);
  border: none;
  color: var(--ft-white);
  width: 36px;
  height: 36px;
  border-radius: 999px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  padding: 0;
  transition: background 0.15s;
}
.theme-toggle:hover { background: rgba(255, 255, 255, 0.16); }
.theme-toggle:focus-visible {
  outline: none;
  box-shadow: 0 0 0 2px var(--ft-green);
}
.theme-toggle svg { width: 18px; height: 18px; }
.theme-toggle .icon-sun { display: none; }
[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }

/* ---------- Page ---------- */

.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 1.5rem calc(1.5rem + env(safe-area-inset-right)) calc(2rem + env(safe-area-inset-bottom)) calc(1.5rem + env(safe-area-inset-left));
}
.page-title {
  font-size: 2rem;
  font-weight: 900;
  letter-spacing: -0.02em;
  margin-bottom: 0.25rem;
}
.page-sub {
  font-family: var(--ft-font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

.card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.5rem 1.25rem;
  margin-bottom: 1rem;
}

/* ---------- Settings ---------- */

.settings .row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 0.75rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border-subtle);
}
.settings .row:last-of-type { border-bottom: none; }

.settings label,
.settings .row-label {
  min-width: 9rem;
  font-weight: 500;
  font-size: 0.9rem;
}

.settings label.checkbox {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 500;
}

.settings input[type="number"] { width: 5rem; }
.settings input[type="text"] { width: 8rem; }

.settings input[type="number"],
.settings input[type="text"],
.settings select {
  padding: 0.45rem 0.55rem;
  background: var(--bg-input);
  color: var(--text-primary);
  border: 1px solid var(--border);
  border-radius: 6px;
  font: inherit;
  font-size: 0.9rem;
  transition: border-color 0.1s, background 0.1s;
}

.settings input:focus,
.settings select:focus {
  outline: none;
  border-color: var(--focus-border);
  background: var(--bg-input-focus);
}

.settings input[type="checkbox"],
.settings input[type="radio"] {
  accent-color: var(--ft-green);
  width: 16px;
  height: 16px;
  cursor: pointer;
}

.settings .hint {
  flex-basis: 100%;
  color: var(--text-secondary);
  font-family: var(--ft-font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding-left: 9rem;
}

.settings .hint code {
  background: var(--code-bg);
  padding: 0.05rem 0.35rem;
  border-radius: 4px;
  text-transform: none;
  letter-spacing: 0;
  color: var(--text-primary);
}

.radio-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  align-items: center;
}
.radio-group label {
  min-width: auto;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 400;
}
.radio-group input[type="number"] { width: 4rem; }

.entropy {
  margin: 0.25rem -1.25rem 0;
  padding: 0.85rem 1.25rem;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  font-family: var(--ft-font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
}
.entropy strong {
  color: var(--ft-green-dark);
  font-size: 1.05rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}
[data-theme="dark"] .entropy strong { color: var(--ft-green); }

/* ---------- Actions ---------- */

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.7rem 1.1rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-surface);
  color: var(--text-primary);
  font-family: var(--ft-font-headline);
  font-weight: 500;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  cursor: pointer;
  min-height: 44px;
  transition: transform 0.05s, opacity 0.15s, background 0.15s, border-color 0.15s;
}
.btn:active:not(:disabled) { transform: scale(0.98); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn:hover:not(:disabled) { border-color: var(--text-primary); }

.btn-primary {
  background: var(--btn-primary-bg);
  color: var(--btn-primary-fg);
  border-color: var(--btn-primary-bg);
}
.btn-primary:hover:not(:disabled) { background: var(--btn-primary-hover); border-color: var(--btn-primary-hover); }

.btn-ghost {
  background: transparent;
  border-color: var(--border);
  color: var(--text-secondary);
}
.btn-ghost:hover:not(:disabled) { color: var(--text-primary); }

/* ---------- Output ---------- */

.output { padding: 0.5rem 1.25rem; }

#passwordList { list-style: none; }

#passwordList li {
  padding: 0.7rem 0;
  border-bottom: 1px solid var(--border-subtle);
}
#passwordList li:last-child { border-bottom: none; }

.password-row {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.password-row code {
  flex: 1;
  background: var(--code-bg);
  padding: 0.55rem 0.7rem;
  border-radius: 6px;
  font-family: var(--ft-font-mono);
  font-weight: 500;
  font-size: 0.95rem;
  word-break: break-all;
  color: var(--text-primary);
}

.row-tag {
  min-width: 5.5rem;
  font-family: var(--ft-font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
}

.copy-btn {
  flex-shrink: 0;
  padding: 0.45rem 0.85rem;
  font-size: 0.7rem;
  min-height: 38px;
}
.copy-btn.copied {
  background: var(--ft-green);
  color: var(--ft-black);
  border-color: var(--ft-green);
}

.empty {
  padding: 1.5rem 0;
  text-align: center;
  color: var(--text-secondary);
  font-family: var(--ft-font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  border-bottom: none !important;
}

/* ---------- Footer ---------- */

footer {
  margin-top: 1.5rem;
  color: var(--text-secondary);
  font-family: var(--ft-font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  text-align: center;
}
footer a { color: var(--ft-green-dark); text-decoration: none; }
[data-theme="dark"] footer a { color: var(--ft-green); }
footer a:hover { text-decoration: underline; }

/* ---------- Responsive ---------- */

@media (max-width: 540px) {
  .page-title { font-size: 1.5rem; }
  .brand-logo { height: 32px; }
  .brand-text { font-size: 0.95rem; }
  .brand-tag { font-size: 0.6rem; }
  .settings label,
  .settings .row-label,
  .settings .hint {
    min-width: auto;
    flex-basis: 100%;
    padding-left: 0;
  }
  .row-tag { min-width: 4.5rem; }
}