/* Design tokens — vault / developer-tools aesthetic */
:root {
  --color-bg: oklch(0.15 0.02 265);
  --color-bg-elevated: oklch(0.19 0.03 265);
  --color-primary: oklch(0.25 0.08 265);
  --color-secondary: oklch(0.35 0.01 265);
  --color-accent: oklch(0.75 0.15 195);
  --color-accent-dim: oklch(0.55 0.12 195);
  --color-fg: oklch(0.85 0.01 265);
  --color-fg-muted: oklch(0.65 0.01 265);
  --color-fg-on-primary: oklch(0.98 0 0);
  --color-fg-on-accent: oklch(0.20 0.02 265);
  --color-border: oklch(0.28 0.03 265);
  --color-success: oklch(0.65 0.18 145);
  --color-warning: oklch(0.75 0.15 85);
  --color-danger: oklch(0.60 0.22 25);
  --color-fair: oklch(0.72 0.14 70);
  --color-good: oklch(0.70 0.14 160);

  --font-sans: "Space Grotesk", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;

  --shadow-xl: 0 20px 40px oklch(0.08 0.02 265 / 0.55), 0 0 0 1px oklch(0.98 0 0 / 0.04);
  --shadow-lift: 0 8px 20px oklch(0.08 0.02 265 / 0.4);

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;

  --ease-snap: cubic-bezier(0.22, 1, 0.36, 1);
  --dur-fast: 180ms;
  --dur-med: 280ms;
  --dur-strength: 400ms;

  --page-pad: var(--space-6);
  --title-size: 32px;
  --password-size: 28px;
}

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

html {
  color-scheme: dark;
}

body {
  margin: 0;
  min-height: 100dvh;
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.6;
  color: var(--color-fg);
  background:
    radial-gradient(ellipse 80% 50% at 50% -10%, oklch(0.28 0.08 265 / 0.45), transparent 55%),
    radial-gradient(ellipse 60% 40% at 100% 100%, oklch(0.30 0.08 195 / 0.12), transparent 50%),
    var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

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

.app {
  width: min(720px, 100%);
  margin: 0 auto;
  padding: var(--page-pad);
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.app__header {
  padding-block: var(--space-2) var(--space-1);
}

.brand {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
}

.brand__icon {
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  flex-shrink: 0;
  border-radius: var(--radius-md);
  background: linear-gradient(145deg, var(--color-primary), oklch(0.22 0.06 250));
  color: var(--color-accent);
  font-size: 26px;
  box-shadow: inset 0 0 0 1px oklch(0.98 0 0 / 0.06);
}

.brand__title {
  margin: 0;
  font-size: var(--title-size);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
  color: var(--color-fg-on-primary);
}

.brand__subtitle {
  margin: var(--space-1) 0 0;
  font-size: 13px;
  color: var(--color-fg-muted);
}

.app__main {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

/* Cards */
.card {
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-xl);
}

.card--generator {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.section-title {
  margin: 0;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 20px;
  font-weight: 600;
  letter-spacing: normal;
  color: var(--color-fg-on-primary);
}

.section-title .ph {
  color: var(--color-accent);
}

/* Password display */
.password-display {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.password-display__input {
  width: 100%;
  padding: var(--space-4) var(--space-5);
  font-family: var(--font-mono);
  font-size: var(--password-size);
  font-weight: 500;
  letter-spacing: 0.05em;
  line-height: 1.35;
  color: var(--color-fg-on-primary);
  background: oklch(0.12 0.02 265);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  outline: none;
  transition: border-color var(--dur-fast) ease, box-shadow var(--dur-fast) ease;
  word-break: break-all;
}

.password-display__input.is-fresh {
  animation: password-in var(--dur-med) var(--ease-snap);
}

.password-display__input:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px oklch(0.75 0.15 195 / 0.22);
}

@keyframes password-in {
  from {
    opacity: 0.45;
    transform: scale(0.985);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.password-display__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.password-display__actions .btn {
  flex: 1 1 140px;
}

/* Buttons */
.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 48px;
  padding: 0 var(--space-4);
  font-family: inherit;
  font-size: 15px;
  font-weight: 600;
  line-height: 1;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition:
    background var(--dur-fast) ease,
    border-color var(--dur-fast) ease,
    color var(--dur-fast) ease,
    transform var(--dur-fast) var(--ease-snap),
    box-shadow var(--dur-fast) ease,
    filter var(--dur-fast) ease,
    opacity var(--dur-fast) ease;
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
  filter: none;
  box-shadow: none;
}

.btn--primary {
  color: var(--color-fg-on-accent);
  background: linear-gradient(145deg, var(--color-accent), oklch(0.68 0.14 200));
  box-shadow: 0 4px 14px oklch(0.75 0.15 195 / 0.25);
}

.btn--primary:hover:not(:disabled) {
  filter: brightness(1.06);
  transform: translateY(-1px);
  box-shadow: var(--shadow-lift), 0 4px 14px oklch(0.75 0.15 195 / 0.3);
}

.btn--primary:active:not(:disabled) {
  transform: translateY(1px);
  filter: brightness(0.96);
}

.btn--secondary {
  color: var(--color-fg-on-primary);
  background: var(--color-primary);
  border-color: var(--color-border);
}

.btn--secondary:hover:not(:disabled) {
  background: oklch(0.30 0.08 265);
}

.btn--ghost {
  color: var(--color-fg);
  background: transparent;
  border-color: var(--color-border);
}

.btn--ghost:hover:not(:disabled) {
  background: oklch(0.98 0 0 / 0.05);
}

.btn--sm {
  min-height: 36px;
  padding: 0 var(--space-3);
  font-size: 13px;
}

.btn__icon-success {
  display: none;
  color: var(--color-accent);
}

.btn.is-success .ph-copy,
.btn.is-success .btn__label {
  display: none;
}

.btn.is-success .btn__icon-success {
  display: inline-flex;
  animation: check-bounce var(--dur-med) var(--ease-snap);
}

@keyframes check-bounce {
  0% { transform: scale(0.6); opacity: 0; }
  60% { transform: scale(1.15); }
  100% { transform: scale(1); opacity: 1; }
}

/* Strength */
.strength {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.strength__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
}

.strength__label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 13px;
  color: var(--color-fg-muted);
}

.strength__meta {
  margin: 0;
  font-size: 13px;
  color: var(--color-fg-muted);
}

.progress {
  height: 8px;
  border-radius: 999px;
  background: oklch(0.12 0.02 265);
  overflow: hidden;
}

.progress__bar {
  height: 100%;
  width: 0%;
  border-radius: inherit;
  background: var(--color-secondary);
  transition:
    width var(--dur-strength) var(--ease-snap),
    background-color var(--dur-strength) ease;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 10px;
  font-size: 13px;
  font-weight: 600;
  border-radius: 999px;
  background: var(--color-secondary);
  color: var(--color-fg-on-primary);
}

.badge--accent {
  background: oklch(0.75 0.15 195 / 0.18);
  color: var(--color-accent);
}

.badge--muted {
  background: oklch(0.98 0 0 / 0.06);
  color: var(--color-fg-muted);
}

.badge--weak { background: oklch(0.60 0.22 25 / 0.2); color: var(--color-danger); }
.badge--fair { background: oklch(0.75 0.15 85 / 0.2); color: var(--color-warning); }
.badge--good { background: oklch(0.70 0.14 160 / 0.2); color: var(--color-good); }
.badge--strong { background: oklch(0.65 0.18 145 / 0.22); color: var(--color-success); }
.badge--excellent { background: oklch(0.75 0.15 195 / 0.22); color: var(--color-accent); }

/* Controls */
.controls {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.control-group__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.control-label {
  margin: 0;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-fg);
}

.slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 8px;
  border-radius: 999px;
  background: oklch(0.12 0.02 265);
  outline: none;
  cursor: pointer;
}

.slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--color-accent);
  border: 2px solid var(--color-fg-on-accent);
  box-shadow: 0 2px 8px oklch(0.75 0.15 195 / 0.35);
  cursor: grab;
  transition: transform var(--dur-fast) var(--ease-snap);
}

.slider::-webkit-slider-thumb:hover {
  transform: scale(1.08);
}

.slider::-moz-range-thumb {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--color-accent);
  border: 2px solid var(--color-fg-on-accent);
  box-shadow: 0 2px 8px oklch(0.75 0.15 195 / 0.35);
  cursor: grab;
}

.switch-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
}

.switch {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: oklch(0.12 0.02 265 / 0.5);
  cursor: pointer;
  user-select: none;
  transition: border-color var(--dur-fast) ease, background var(--dur-fast) ease;
}

.switch--solo {
  padding: var(--space-3) var(--space-4);
}

.switch:has(input:checked) {
  border-color: oklch(0.75 0.15 195 / 0.45);
  background: oklch(0.75 0.15 195 / 0.06);
}

.switch input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.switch__track {
  position: relative;
  flex-shrink: 0;
  width: 40px;
  height: 22px;
  border-radius: 999px;
  background: var(--color-secondary);
  transition: background var(--dur-fast) ease;
}

.switch__track::after {
  content: "";
  position: absolute;
  top: 2px;
  left: 2px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--color-fg-on-primary);
  transition: transform var(--dur-fast) var(--ease-snap);
}

.switch input:checked + .switch__track {
  background: var(--color-accent);
}

.switch input:checked + .switch__track::after {
  transform: translateX(18px);
  background: var(--color-fg-on-accent);
}

.switch input:focus-visible + .switch__track {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.switch__content {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 14px;
  color: var(--color-fg);
}

.switch__content .ph {
  color: var(--color-accent-dim);
}

.form-message {
  margin: 0;
  font-size: 13px;
  line-height: 1.45;
}

.form-message--error {
  color: var(--color-danger);
}

.form-message--warning {
  color: var(--color-warning);
}

/* Lists */
.list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.list[hidden],
.empty-state[hidden] {
  display: none;
}

.list-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: oklch(0.12 0.02 265 / 0.55);
  min-height: 52px;
}

.list-item__body {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.list-item__primary {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.03em;
  color: var(--color-fg-on-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.list-item__primary--name {
  font-family: var(--font-sans);
  font-weight: 600;
  letter-spacing: normal;
}

.list-item__meta {
  margin: 0;
  font-size: 13px;
  color: var(--color-fg-muted);
}

.list-item__actions {
  display: flex;
  gap: var(--space-1);
  flex-shrink: 0;
}

.list-item__actions .btn {
  min-height: 40px;
  min-width: 40px;
  padding: 0 var(--space-2);
}

.empty-state {
  margin: 0;
  padding: var(--space-4);
  text-align: center;
  font-size: 14px;
  color: var(--color-fg-muted);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-md);
}

.scroll-area {
  max-height: 320px;
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-width: thin;
  scrollbar-color: var(--color-secondary) transparent;
}

/* Toasts */
.toast-region {
  position: fixed;
  z-index: 100;
  bottom: var(--space-6);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  width: min(420px, calc(100% - 32px));
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  background: var(--color-primary);
  border: 1px solid var(--color-border);
  color: var(--color-fg-on-primary);
  font-size: 14px;
  box-shadow: var(--shadow-xl);
  animation: toast-in var(--dur-med) var(--ease-snap);
}

.toast--success {
  border-color: oklch(0.75 0.15 195 / 0.4);
}

.toast--error {
  border-color: oklch(0.60 0.22 25 / 0.45);
}

.toast.is-leaving {
  animation: toast-out var(--dur-fast) ease forwards;
}

@keyframes toast-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes toast-out {
  to { opacity: 0; transform: translateY(6px); }
}

/* Dialog */
.dialog {
  width: min(420px, calc(100% - 32px));
  padding: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-bg-elevated);
  color: var(--color-fg);
  box-shadow: var(--shadow-xl);
}

.dialog::backdrop {
  background: oklch(0.08 0.02 265 / 0.7);
  backdrop-filter: blur(4px);
}

.dialog__form {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding: var(--space-6);
}

.dialog__title {
  margin: 0 0 var(--space-2);
  font-size: 20px;
  font-weight: 600;
  color: var(--color-fg-on-primary);
}

.dialog__input {
  width: 100%;
  min-height: 44px;
  padding: 0 var(--space-3);
  font-family: inherit;
  font-size: 15px;
  color: var(--color-fg-on-primary);
  background: oklch(0.12 0.02 265);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  outline: none;
}

.dialog__input:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px oklch(0.75 0.15 195 / 0.2);
}

.dialog__actions {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-2);
  margin-top: var(--space-2);
}

/* Mobile */
@media (max-width: 640px) {
  :root {
    --page-pad: var(--space-4);
    --title-size: 28px;
    --password-size: 24px;
  }

  .brand {
    gap: var(--space-3);
  }

  .brand__icon {
    width: 44px;
    height: 44px;
    font-size: 22px;
  }

  .card {
    padding: var(--space-4);
  }

  .switch-grid {
    grid-template-columns: 1fr;
  }

  .password-display__actions {
    flex-direction: column;
  }

  .password-display__actions .btn {
    flex: 1 1 auto;
    width: 100%;
  }

  .slider::-webkit-slider-thumb {
    width: 26px;
    height: 26px;
  }

  .slider::-moz-range-thumb {
    width: 26px;
    height: 26px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}