:root {
  color-scheme: dark;
  --page-bg: #151820;
  --surface: #202430;
  --surface-raised: #292e3b;
  --text: #f4f1e9;
  --muted: #b9bdc8;
  --accent: #c7a96b;
  --accent-contrast: #171717;
  --border: rgb(255 255 255 / 14%);
  --shadow: 0 16px 40px rgb(0 0 0 / 22%);
  --body-font: system-ui, -apple-system, "Segoe UI", sans-serif;
  --heading-font: Georgia, "Times New Roman", serif;
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background: var(--page-bg);
}

body {
  min-height: 100vh;
  margin: 0;
  background: var(--page-bg);
  color: var(--text);
  font: 16px/1.6 var(--body-font);
  transition: background-color 250ms ease, color 250ms ease;
}

button,
select,
input {
  font: inherit;
}

button,
select {
  min-height: 44px;
  border: 1px solid var(--border);
  border-radius: 10px;
}

button {
  padding: 9px 16px;
  background: var(--surface-raised);
  color: var(--text);
  cursor: pointer;
  font-weight: 700;
  transition: transform 120ms ease, filter 120ms ease;
}

button:hover {
  filter: brightness(1.12);
}

button:active {
  transform: translateY(1px);
}

button:focus-visible,
select:focus-visible,
input:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
}

select {
  width: 100%;
  padding: 8px 12px;
  background: var(--surface-raised);
  color: var(--text);
}

main {
  width: min(960px, calc(100% - 32px));
  margin: 0 auto;
  padding: 48px 0 60px;
}

header {
  position: relative;
  margin-bottom: 28px;
  padding: 28px 30px;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

h1,
h2 {
  font-family: var(--heading-font);
  line-height: 1.15;
}

h1 {
  margin: 0 0 10px;
  font-size: clamp(2.2rem, 7vw, 4rem);
  letter-spacing: -0.035em;
}

h2 {
  margin: 0 0 8px;
  font-size: clamp(1.4rem, 4vw, 2rem);
}

p {
  margin: 0 0 14px;
}

.intro,
.muted {
  color: var(--muted);
}

.intro {
  max-width: 65ch;
  margin-bottom: 0;
  font-size: 1.05rem;
}

.controls {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 18px;
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.control-label {
  display: block;
  margin-bottom: 7px;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 700;
}

.tool-card {
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.tool-heading {
  margin-bottom: 20px;
}

.tool-heading p {
  margin-bottom: 0;
  color: var(--muted);
}

.fields {
  display: grid;
  gap: 12px;
}

.result-card {
  padding: 15px 17px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface-raised);
}

.result-card.is-locked {
  border-color: var(--accent);
}

.field-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 5px;
}

.field-name {
  font-weight: 750;
}

.field-value {
  min-height: 1.6em;
  color: var(--text);
}

.lock-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--muted);
  cursor: pointer;
  font-size: 0.88rem;
  white-space: nowrap;
}

.lock-label input {
  accent-color: var(--accent);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

button.primary {
  border-color: var(--accent);
  background: var(--accent);
  color: var(--accent-contrast);
}

#status {
  min-height: 1.5em;
  margin-top: 11px;
  color: var(--muted);
  font-size: 0.92rem;
}

footer {
  margin-top: 24px;
  color: var(--muted);
  font-size: 0.9rem;
  text-align: center;
}

@media (max-width: 640px) {
  main {
    width: min(100% - 22px, 960px);
    padding: 22px 0 36px;
  }

  header {
    padding: 22px 19px;
  }

  .controls {
    grid-template-columns: 1fr;
    gap: 13px;
    padding: 15px;
  }

  .tool-card {
    padding: 17px;
  }

  .field-top {
    align-items: flex-start;
  }
}

@media print {
  :root {
    color-scheme: light;
    --page-bg: #fff;
    --surface: #fff;
    --surface-raised: #fff;
    --text: #000;
    --muted: #333;
    --border: #bbb;
    --shadow: none;
  }

  body,
  html {
    background: #fff !important;
    color: #000 !important;
  }

  main {
    width: 100%;
    padding: 0;
  }

  header {
    padding: 0 0 14px;
    border: 0;
    box-shadow: none;
  }

  .controls,
  .actions,
  .lock-label,
  #status,
  footer {
    display: none !important;
  }

  .tool-card,
  .result-card {
    padding: 0;
    border: 0;
    background: #fff;
    box-shadow: none;
  }

  .result-card {
    margin-bottom: 12px;
    break-inside: avoid;
  }

  .field-value,
  .tool-heading p,
  .intro {
    color: #000;
  }
}