:root {
  color-scheme: dark;
  --bg: #0b0d14;
  --card: rgba(26, 29, 42, 0.7);
  --card-border: rgba(255, 255, 255, 0.08);
  --text: #eef0f6;
  --muted: #9095a8;
  --accent: #7c8fff;
  --accent-2: #b06dff;
  --accent-hover: #6b7fff;
  --on-accent: #fff;
  --weak: #ff5d5d;
  --fair: #ffa940;
  --good: #ffd645;
  --strong: #3ddc84;
  --radius: 18px;
  --field: rgba(0, 0, 0, 0.25);
  --glow: rgba(124, 143, 255, 0.18);
  --glow: color-mix(in srgb, var(--accent) 18%, transparent);
  --seg-active: rgba(124, 143, 255, 0.22);
  --seg-active: color-mix(in srgb, var(--accent) 22%, transparent);
}

html[data-theme="light"] {
  color-scheme: light;
  --bg: #eef1f8;
  --card: rgba(255, 255, 255, 0.78);
  --card-border: rgba(20, 25, 50, 0.10);
  --text: #1a1d2b;
  --muted: #5b6175;
  --field: rgba(20, 25, 50, 0.05);
  --glow: rgba(124, 143, 255, 0.28);
  --glow: color-mix(in srgb, var(--accent) 30%, transparent);
  --seg-active: rgba(90, 75, 214, 0.16);
  --seg-active: color-mix(in srgb, var(--accent) 22%, transparent);
}

html[data-theme="light"] h1 {
  background: linear-gradient(120deg, #1a1d2b, #5a4bd6);
  -webkit-background-clip: text;
  background-clip: text;
}

/* Light-mode contrast fixes for elements designed against the dark bg */
html[data-theme="light"] .subtitle code { color: #5a4bd6; }
html[data-theme="light"] .seg-btn.is-active { color: #3a2db5; }

* { box-sizing: border-box; margin: 0; padding: 0; }

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

body {
  font-family: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background:
    radial-gradient(1200px 600px at 15% -10%, rgba(124, 143, 255, 0.18), transparent 60%),
    radial-gradient(1000px 500px at 110% 10%, rgba(176, 109, 255, 0.16), transparent 55%),
    var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

/* Animated aurora blobs drifting in the background */
.aurora {
  position: fixed;
  inset: -25%;
  z-index: 0;
  pointer-events: none;
  filter: blur(70px) saturate(150%);
  opacity: 0.55;
}

.aurora::before,
.aurora::after {
  content: "";
  position: absolute;
  border-radius: 50%;
}

.aurora::before {
  width: 55vw;
  height: 55vw;
  top: -8%;
  left: -6%;
  background: radial-gradient(circle, var(--accent), transparent 70%);
  animation: drift-a 19s ease-in-out infinite alternate;
}

.aurora::after {
  width: 50vw;
  height: 50vw;
  bottom: -10%;
  right: -6%;
  background: radial-gradient(circle, var(--accent-2), transparent 70%);
  animation: drift-b 23s ease-in-out infinite alternate;
}

html[data-theme="light"] .aurora { opacity: 0.4; }

@keyframes drift-a {
  from { transform: translate(0, 0) scale(1); }
  to   { transform: translate(18vw, 14vh) scale(1.25); }
}
@keyframes drift-b {
  from { transform: translate(0, 0) scale(1); }
  to   { transform: translate(-16vw, -12vh) scale(1.2); }
}

/* Soft glow that follows the cursor (position set from JS via --mx/--my) */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: radial-gradient(480px circle at var(--mx, 50%) var(--my, 0%), var(--glow), transparent 65%);
}

/* Faint film-grain texture over everything */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 50;
  pointer-events: none;
  opacity: 0.05;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.card {
  position: relative;
  z-index: 2;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  width: 100%;
  max-width: 480px;
  padding: 34px;
  backdrop-filter: blur(20px) saturate(140%);
  -webkit-backdrop-filter: blur(20px) saturate(140%);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.55), inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

/* Rotating conic-gradient glow around the card border */
@property --angle {
  syntax: "<angle>";
  initial-value: 0deg;
  inherits: false;
}

.card::before {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  padding: 1.5px;
  background: conic-gradient(from var(--angle), transparent 20%, var(--accent), var(--accent-2), transparent 80%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask-composite: exclude;
  animation: spin-border 6s linear infinite;
  pointer-events: none;
}

@keyframes spin-border { to { --angle: 360deg; } }

/* Theme toggle */
.theme-toggle {
  position: absolute;
  top: 18px;
  right: 18px;
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--card-border);
  color: var(--muted);
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.theme-toggle:hover { color: var(--text); border-color: var(--accent); }
.theme-toggle .icon-moon { display: none; }
.theme-toggle .icon-sun { display: block; }
html[data-theme="light"] .theme-toggle .icon-sun { display: none; }
html[data-theme="light"] .theme-toggle .icon-moon { display: block; }

.header { text-align: center; margin-bottom: 22px; }

.logo {
  font-size: 1.8rem;
  width: 56px;
  height: 56px;
  margin: 0 auto 12px;
  display: grid;
  place-items: center;
  border-radius: 16px;
  background: linear-gradient(135deg, rgba(124,143,255,0.25), rgba(176,109,255,0.25));
  border: 1px solid var(--card-border);
}

h1 {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(120deg, #fff, #c9cdff);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.subtitle { color: var(--muted); font-size: 0.82rem; margin-top: 6px; }

.subtitle code {
  background: var(--field);
  padding: 1px 6px;
  border-radius: 5px;
  color: #c9cdff;
  font-size: 0.8rem;
}

/* Output */
.output {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--field);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 14px;
}

.password {
  flex: 1;
  font-family: "SF Mono", "Fira Code", ui-monospace, Menlo, Consolas, monospace;
  font-size: 1.15rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  word-break: break-all;
  color: var(--text);
  min-height: 1.4em;
  cursor: pointer;
}

.output-actions { display: flex; gap: 6px; flex-shrink: 0; }

.icon-btn {
  display: grid;
  place-items: center;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--card-border);
  color: var(--muted);
  border-radius: 9px;
  width: 36px;
  height: 36px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.icon-btn:hover { color: var(--text); border-color: var(--accent); background: color-mix(in srgb, var(--accent) 14%, transparent); }
.icon-btn:active { transform: scale(0.92); }

/* Copy confirmation: swap copy icon for a checkmark */
.icon-btn .icon-check { display: none; color: var(--strong); }
.icon-btn.copied { color: var(--strong); border-color: var(--strong); }
.icon-btn.copied .icon-copy { display: none; }
.icon-btn.copied .icon-check { display: block; }

/* Controls */
.controls { margin-bottom: 22px; margin-top: 4px; }

.control-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
  gap: 12px;
}

.control-row label { font-size: 0.9rem; font-weight: 500; }

.pill {
  font-family: ui-monospace, monospace;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--on-accent);
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  padding: 2px 12px;
  border-radius: 7px;
  min-width: 38px;
  text-align: center;
}

.slider {
  width: 100%;
  -webkit-appearance: none;
  appearance: none;
  height: 7px;
  border-radius: 4px;
  background: var(--field);
  outline: none;
  margin-bottom: 18px;
}

.slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  cursor: pointer;
  border: 4px solid var(--bg);
  box-shadow: 0 2px 8px rgba(124, 143, 255, 0.5);
  box-shadow: 0 2px 8px color-mix(in srgb, var(--accent) 50%, transparent);
}

.slider::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  border: 4px solid var(--bg);
}

/* Segmented separator control */
.seg {
  position: relative;
  display: flex;
  gap: 4px;
  background: var(--field);
  border: 1px solid var(--card-border);
  border-radius: 9px;
  padding: 3px;
}

/* Sliding pill behind the active separator */
.seg-glider {
  position: absolute;
  top: 0;
  left: 0;
  width: 0;
  height: 0;
  border-radius: 6px;
  background: var(--seg-active);
  transition: transform 0.28s cubic-bezier(0.34, 1.56, 0.64, 1), width 0.28s ease, height 0.28s ease;
  pointer-events: none;
  z-index: 0;
}

.seg-btn {
  position: relative;
  z-index: 1;
  background: transparent;
  border: none;
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 5px 9px;
  border-radius: 6px;
  cursor: pointer;
  transition: color 0.15s ease;
  min-width: 26px;
}

.seg-btn:hover { color: var(--text); }
.seg-btn.is-active { color: #fff; }

/* Toggle switches */
.options { border: none; display: flex; flex-direction: column; gap: 13px; margin-top: 6px; }

.check {
  display: flex;
  align-items: center;
  gap: 11px;
  font-size: 0.9rem;
  cursor: pointer;
  user-select: none;
  padding: 6px 0;
}

.check + .check { margin-top: 2px; }

.check input {
  -webkit-appearance: none;
  appearance: none;
  position: relative;
  flex-shrink: 0;
  width: 44px;
  height: 26px;
  border-radius: 999px;
  background: var(--field);
  border: 1px solid var(--card-border);
  cursor: pointer;
  transition: background 0.2s ease;
}

.check input::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 3px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #fff;
  transform: translateY(-50%);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.35);
  transition: transform 0.22s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.check input:checked {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-color: transparent;
}

.check input:checked::before { transform: translate(18px, -50%); }

/* Accent colour swatches */
.swatches {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.swatch {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: none;
  padding: 0;
  cursor: pointer;
  background: linear-gradient(135deg, var(--s1, var(--accent)), var(--s2, var(--accent-2)));
  transition: transform 0.12s ease;
}

.swatch:hover { transform: scale(1.12); }
.swatch.is-active { outline: 2px solid var(--text); outline-offset: 2px; }
.swatch:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* Custom colour picker swatch */
.swatch-custom {
  position: relative;
  overflow: hidden;
  display: inline-block;
  background: conic-gradient(from 0deg, #ff5d5d, #ffd645, #3ddc84, #38bdf8, #b06dff, #ff5d5d);
}

.swatch-custom input {
  position: absolute;
  inset: -4px;
  width: calc(100% + 8px);
  height: calc(100% + 8px);
  border: none;
  padding: 0;
  opacity: 0;
  cursor: pointer;
}

.check code {
  color: var(--muted);
  font-size: 0.8rem;
  background: var(--field);
  padding: 1px 6px;
  border-radius: 5px;
}

/* Generate button */
.generate-btn {
  position: relative;
  overflow: hidden;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: var(--on-accent);
  border: none;
  border-radius: 12px;
  padding: 15px;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.06s ease, box-shadow 0.2s ease, filter 0.2s ease;
  box-shadow: 0 8px 24px rgba(124, 143, 255, 0.35);
  box-shadow: 0 8px 24px color-mix(in srgb, var(--accent) 35%, transparent);
}

/* Moving sheen */
.generate-btn::after {
  content: "";
  position: absolute;
  top: 0;
  left: -150%;
  width: 55%;
  height: 100%;
  background: linear-gradient(120deg, transparent, rgba(255, 255, 255, 0.35), transparent);
  transform: skewX(-20deg);
  animation: shimmer 4s ease-in-out infinite;
  pointer-events: none;
}

@keyframes shimmer {
  0% { left: -150%; }
  55%, 100% { left: 150%; }
}

.generate-btn:hover { filter: brightness(1.08); box-shadow: 0 10px 30px color-mix(in srgb, var(--accent) 50%, transparent); }
.generate-btn:active { transform: scale(0.985); }

/* Icon spin on click (added/removed from JS) */
@keyframes icon-spin { to { transform: rotate(360deg); } }
.spin-icon { animation: icon-spin 0.5s ease; }
.generate-btn svg, .icon-btn svg { transform-box: fill-box; transform-origin: center; }

.footer {
  margin-top: 20px;
  text-align: center;
  font-size: 0.72rem;
  color: var(--muted);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
}

.dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--strong);
  box-shadow: 0 0 8px var(--strong);
}

/* Toast */
.toast {
  position: fixed;
  z-index: 100;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%) translateY(120px);
  background: linear-gradient(135deg, var(--strong), #2bc46f);
  color: #06231a;
  padding: 11px 24px;
  border-radius: 10px;
  font-size: 0.85rem;
  font-weight: 700;
  opacity: 0;
  transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
  pointer-events: none;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

.toast.show { transform: translateX(-50%) translateY(0); opacity: 1; }

/* Update available banner */
.update {
  position: fixed;
  z-index: 100;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--card);
  border: 1px solid var(--card-border);
  backdrop-filter: blur(20px) saturate(140%);
  -webkit-backdrop-filter: blur(20px) saturate(140%);
  color: var(--text);
  padding: 10px 10px 10px 18px;
  border-radius: 12px;
  font-size: 0.85rem;
  font-weight: 600;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

.update[hidden] { display: none; }

.update button {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: var(--on-accent);
  border: none;
  border-radius: 8px;
  padding: 7px 14px;
  font-size: 0.82rem;
  font-weight: 700;
  cursor: pointer;
}

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

/* Keyboard hint */
.hint {
  text-align: center;
  font-size: 0.72rem;
  color: var(--muted);
  margin-top: 14px;
}

.hint kbd {
  font-family: ui-monospace, monospace;
  background: var(--field);
  border: 1px solid var(--card-border);
  border-radius: 5px;
  padding: 1px 6px;
  font-size: 0.72rem;
  color: var(--text);
}

.noscript-note { color: var(--weak); margin-top: 0; }

/* Visible focus for keyboard users */
.icon-btn:focus-visible,
.seg-btn:focus-visible,
.generate-btn:focus-visible,
.theme-toggle:focus-visible,
.check input:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.slider:focus-visible::-webkit-slider-thumb {
  box-shadow: 0 0 0 5px rgba(124, 143, 255, 0.4);
}
.slider:focus-visible::-moz-range-thumb {
  box-shadow: 0 0 0 5px rgba(124, 143, 255, 0.4);
}

/* Respect reduced-motion preference */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}

@media (max-width: 420px) {
  .card { padding: 24px; }
  .seg-btn { padding: 5px 7px; min-width: 22px; }
}