:root {
  --bg: #f4f1eb;
  --panel: #ffffff;
  --panel-soft: #fbfaf7;
  --panel-edge: #dad3c7;
  --text: #231f1a;
  --muted: #746a5f;
  --accent: #286e5d;
  --accent-dark: #1f584a;
  --accent-soft: #e3f1ec;
  --button-surface: linear-gradient(180deg, #fff 0%, #f1ece4 100%);
  --button-text: #5a4b3b;
  --field-bg: #fff;
  --output-bg: #fffdf8;
  --shadow: 0 18px 40px rgba(34, 25, 12, 0.08);
}

body[data-theme='dark'] {
  --bg: #171c20;
  --panel: #1f262b;
  --panel-soft: #262f35;
  --panel-edge: #3b4953;
  --text: #eef3f5;
  --muted: #aeb9c0;
  --accent: #72c6ae;
  --accent-dark: #4ca18b;
  --accent-soft: #243b35;
  --button-surface: linear-gradient(180deg, #2d3940 0%, #232d33 100%);
  --button-text: #e5edf0;
  --field-bg: #182025;
  --output-bg: #151c21;
  --shadow: 0 18px 40px rgba(34, 25, 12, 0.08);
}

a {
  text-decoration: none;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Georgia, 'Times New Roman', serif;
  background: radial-gradient(circle at top left, rgba(201, 168, 104, 0.16), transparent 28%),
    linear-gradient(180deg, #fbfaf7 0%, var(--bg) 100%);
  color: var(--text);
  transition: background-color 180ms ease, color 180ms ease;
}

button,
input,
select {
  font: inherit;
}

.page {
  padding: 32px 20px;
}

.card {
  max-width: 980px;
  margin: 0 auto;
  background: linear-gradient(
    180deg,
    color-mix(in srgb, var(--panel) 96%, white 4%),
    var(--panel-soft)
  );
  border: 1px solid var(--panel-edge);
  box-shadow: var(--shadow);
  border-radius: 20px;
  padding: 22px 26px 28px;
}

.hero {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 24px;
  border-bottom: 1px solid #dfd7ca;
  padding-bottom: 18px;
}

.hero__brand {
  display: flex;
  align-items: center;
  gap: 18px;
}

.hero__actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.hero__icon {
  font-size: 3rem;
  line-height: 1;
  filter: drop-shadow(0 5px 5px rgba(0, 0, 0, 0.15));
}

h1 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 500;
}

.hero__subtitle {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 1rem;
}

.language-picker select,
#length,
#password-output {
  border: 1px solid #bcb3a7;
  background: var(--field-bg);
  border-radius: 8px;
  min-height: 44px;
  color: var(--text);
}

.language-picker select,
#length {
  padding: 0 14px;
}

#length {
  width: min(100%, 220px);
}

.generator-form {
  padding-top: 22px;
}

.setting-grid {
  display: grid;
  grid-template-columns: minmax(220px, auto) minmax(0, 1fr);
  gap: 12px 24px;
  align-items: center;
}

.checkline {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.custom-input-group {
  display: grid;
  gap: 10px;
}

#customChars {
  width: 100%;
  min-height: 44px;
  padding: 0 14px;
  border: 1px solid #bcb3a7;
  background: var(--field-bg);
  border-radius: 8px;
  color: var(--text);
}

#customChars:disabled {
  background: color-mix(in srgb, var(--field-bg) 70%, var(--panel-soft) 30%);
  color: #8a7f73;
}

.theme-switch {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border: 1px solid var(--panel-edge);
  border-radius: 999px;
  background: var(--button-surface);
  color: var(--button-text);
}

.theme-switch__label {
  font-size: 0.95rem;
}

.theme-switch input {
  width: 42px;
  height: 24px;
  appearance: none;
  border-radius: 999px;
  border: 1px solid var(--panel-edge);
  background: color-mix(in srgb, var(--panel-edge) 55%, var(--panel) 45%);
  position: relative;
  cursor: pointer;
  transition: background-color 140ms ease;
}

.theme-switch input::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #fff;
  transition: transform 140ms ease;
}

.theme-switch input:checked {
  background: var(--accent);
}

.theme-switch input:checked::after {
  transform: translateX(18px);
}

.checkline input {
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
}

.inline-note {
  color: var(--muted);
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: flex-start;
  align-items: stretch;
  padding-top: 24px;
  margin-left: 244px;
}

button {
  cursor: pointer;
  border-radius: 10px;
  transition: transform 120ms ease, box-shadow 120ms ease, background-color 120ms ease;
}

button:hover {
  transform: translateY(-1px);
}

button:active {
  transform: translateY(0);
}

.primary,
.ghost,
.copy-button {
  min-height: 46px;
  padding: 0 18px;
  border: 1px solid #cfc6b9;
  box-shadow: 0 8px 16px rgba(58, 45, 27, 0.08);
}

.controls .primary,
.controls .ghost {
  min-width: 160px;
}

.primary {
  background: linear-gradient(180deg, var(--accent) 0%, var(--accent-dark) 100%);
  color: #fff;
  border-color: transparent;
}

.ghost,
.copy-button {
  background: var(--button-surface);
  color: var(--button-text);
}

.output {
  padding-top: 22px;
}

.output__row {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 16px 24px;
  align-items: center;
  margin-bottom: 16px;
}

.output__controls {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 12px;
  align-items: start;
}

#password-output {
  width: 100%;
  padding: 12px 14px;
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--accent);
  background: var(--output-bg);
  resize: none;
  line-height: 1.45;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  overflow-y: auto;
}

.memory-hint {
  margin: 0;
  color: #4d3927;
  font-size: 1.1rem;
}

.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;
}

@media (max-width: 760px) {
  .page {
    padding: 16px 12px;
  }

  .card {
    padding: 18px;
    border-radius: 16px;
  }

  .hero,
  .hero__brand {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero__actions {
    width: 100%;
    justify-content: space-between;
  }

  .setting-grid,
  .output__row,
  .output__controls {
    grid-template-columns: 1fr;
  }

  .setting-grid {
    gap: 8px 16px;
  }

  .checkline {
    align-items: flex-start;
  }

  .custom-input-group {
    gap: 8px;
  }

  .controls {
    margin-left: 0;
    justify-content: stretch;
    gap: 10px;
  }

  .controls button,
  .copy-button {
    width: 100%;
  }

  #password-output {
    min-height: 52px;
  }
}

@media (max-width: 480px) {
  .hero__icon {
    font-size: 2.5rem;
  }

  h1 {
    font-size: 1.8rem;
  }

  .hero__subtitle,
  .inline-note,
  .memory-hint {
    font-size: 0.95rem;
  }

  .primary,
  .ghost,
  .copy-button,
  .theme-switch,
  .language-picker select,
  #length,
  #customChars,
  #password-output {
    min-height: 42px;
  }

  .theme-switch {
    width: 100%;
    justify-content: space-between;
  }
}