:root,
.light {
  --color-bg: #f4f7fb;
  --color-bg-secondary: #ffffff;
  --color-border: #b0c4db;
  --color-text: #0a1628;
  --color-text-muted: #4a5f7a;
  --color-primary: #2563eb;
  --color-primary-hover: #1d4ed8;
  --color-hover: #e8eef6;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
}

.dark {
  --color-bg: #0b1120;
  --color-bg-secondary: #111b2e;
  --color-border: #1e2d47;
  --color-text: #e8edf4;
  --color-text-muted: #7a92b8;
  --color-primary: #60a5fa;
  --color-primary-hover: #3b82f6;
  --color-hover: #162238;
}

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

body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    sans-serif;
  background-color: var(--color-bg);
  color: var(--color-text);
  transition: background-color 0.2s, color 0.2s;
}

.container {
  width: 100%;
  max-width: 42rem;
  padding: 1rem;
}

.password-box {
  background-color: var(--color-bg-secondary);
  width: 100%;
  max-width: 42rem;
  margin: 0 auto;
  padding: 1.25rem;
  border-radius: 0.5rem;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border);
}

.header {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.lock-icon {
  color: var(--color-primary);
}

.header h1 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text);
}

.header p {
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

.password-display {
  margin-top: 1.25rem;
  display: flex;
  gap: 0.5rem;
}

.password-display input {
  flex: 1;
  padding: 0.5rem 0.75rem;
  border-radius: 0.375rem;
  border: 1px solid var(--color-border);
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: monospace;
  font-size: 0.875rem;
  outline: none;
  transition: border-color 0.15s;
}

.password-display input:focus {
  border-color: var(--color-primary);
}

.password-display button {
  padding: 0.5rem;
  border-radius: 0.375rem;
  border: none;
  background-color: transparent;
  cursor: pointer;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  width: 42px;
  height: 42px;
}

.password-display button:hover {
  background-color: var(--color-hover);
  color: var(--color-text);
}

.password-display button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.length-control {
  margin-top: 1.5rem;
}

.length-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.5rem;
}

.length-label label {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.length-label span {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text);
}

.length-control input[type="range"] {
  width: 100%;
  cursor: pointer;
  accent-color: var(--color-primary);
}

.settings {
  margin-top: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  font-size: 0.875rem;
  color: var(--color-text);
}

.checkbox-label input[type="checkbox"] {
  appearance: none;
  -webkit-appearance: none;
  width: 1.125rem;
  height: 1.125rem;
  border: 2px solid var(--color-border);
  border-radius: 0.25rem;
  background-color: var(--color-bg-secondary);
  cursor: pointer;
  position: relative;
}

.checkbox-label input[type="checkbox"]:checked {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
}

.checkbox-label input[type="checkbox"]:checked::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 2px;
  width: 5px;
  height: 9px;
  border: solid white;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

#generateButton {
  margin-top: 1.875rem;
  width: 100%;
  padding: 0.5rem 1rem;
  background-color: var(--color-primary);
  color: white;
  border: none;
  border-radius: 0.375rem;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  transition: background-color 0.2s;
}

#generateButton:hover {
  background-color: var(--color-primary-hover);
}

.password-display button svg,
#generateButton svg {
  width: 1.25rem;
  height: 1.25rem;
}

#generateButton svg {
  width: 1rem;
  height: 1rem;
}

.password-display button svg,
.checkbox-label input[type="checkbox"]:checked::after {
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.security-note {
  margin-top: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

@media (max-width: 480px) {
  .security-note {
    flex-direction: column;
    text-align: center;
  }
}

.security-note svg {
  color: var(--color-text-muted);
  width: 1rem;
  height: 1rem;
}

.security-note p {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  text-align: center;
}

hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin-top: 2rem;
}

.hidden {
  display: none;
}

.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;
}