/* Toolpane — practical utility look (~2020 / Delim / Bootstrap-ish) */
:root {
  --bg: #f5f5f5;
  --bg-elevated: #ffffff;
  --bg-card: #ffffff;
  --border: #ccc;
  --border-soft: #ddd;
  --text: #222;
  --text-muted: #555;
  --text-dim: #777;
  --accent: #06c;
  --accent-hover: #0052a3;
  --accent-soft: #e8f0fa;
  --success: #2a7a3a;
  --success-soft: #e8f5ea;
  --radius: 10px;
  --radius-sm: 6px;
  --shadow: none;
  --font: Helvetica, Arial, "Helvetica Neue", sans-serif;
  --mono: Consolas, "Courier New", Monaco, monospace;
  --max: 900px;
  --header-h: 48px;
}

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

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

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.45;
  color: var(--text);
  background: var(--bg);
}

a {
  color: var(--accent);
  text-decoration: underline;
}
a:hover {
  color: var(--accent-hover);
}

img {
  max-width: 100%;
  height: auto;
}

code {
  font-family: var(--mono);
  font-size: 0.9em;
  background: #eee;
  padding: 0.1em 0.3em;
  border: 1px solid #ddd;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-h);
  border-bottom: 1px solid var(--border);
  background: #fff;
}

.site-header__inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 12px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 700;
  font-size: 16px;
  color: var(--text);
  text-decoration: none;
}
.logo:hover {
  color: var(--text);
  text-decoration: none;
}
.logo__mark {
  width: 22px;
  height: 22px;
  border-radius: 6px;
  background: var(--accent);
  display: grid;
  place-items: center;
  font-size: 11px;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}

.nav {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav a {
  color: var(--accent);
  font-size: 14px;
  font-weight: 400;
  padding: 4px 8px;
  text-decoration: none;
}
.nav a:hover {
  text-decoration: underline;
}
.nav a[aria-current="page"] {
  color: var(--text);
  font-weight: 600;
  text-decoration: none;
}

/* Layout */
.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 12px;
}

main {
  padding-bottom: 32px;
}

/* Hero (marketing) */
.hero {
  padding: 28px 0 16px;
  text-align: left;
}
.hero__badge {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--text-muted);
  background: #eee;
  border: 1px solid var(--border-soft);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  margin-bottom: 10px;
}
.hero h1 {
  margin: 0 0 10px;
  font-size: 26px;
  font-weight: 700;
  line-height: 1.25;
  color: var(--text);
}
.hero__lead {
  margin: 0 0 16px;
  max-width: 36rem;
  color: var(--text-muted);
  font-size: 15px;
}
.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

/* Buttons — flat, utilitarian */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  padding: 7px 14px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
}
.btn--primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent-hover);
}
.btn--primary:hover {
  background: var(--accent-hover);
  color: #fff;
  text-decoration: none;
}
.btn--ghost {
  background: #fff;
  color: var(--text);
  border-color: var(--border);
}
.btn--ghost:hover {
  background: #eee;
  color: var(--text);
  text-decoration: none;
}
.btn--sm {
  font-size: 12px;
  padding: 3px 8px;
  font-weight: 500;
}
.btn--copy {
  background: #fff;
  color: var(--text-muted);
  border-color: var(--border);
}
.btn--copy:hover {
  color: var(--text);
  border-color: #999;
  background: #f0f0f0;
}
.btn--copy.is-copied {
  color: var(--success);
  border-color: var(--success);
  background: var(--success-soft);
}

/* Tool cards on home */
.tools-grid {
  display: grid;
  gap: 10px;
  grid-template-columns: 1fr;
  padding: 8px 0 24px;
}
@media (min-width: 640px) {
  .tools-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
.tool-card {
  display: block;
  padding: 14px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-decoration: none;
  color: inherit;
}
.tool-card:hover {
  border-color: #999;
  background: #fafafa;
  text-decoration: none;
  color: inherit;
}
.tool-card__icon {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  background: #eee;
  border: 1px solid var(--border-soft);
  color: var(--text-muted);
  display: grid;
  place-items: center;
  font-size: 14px;
  margin-bottom: 8px;
}
.tool-card h2 {
  margin: 0 0 4px;
  font-size: 16px;
  font-weight: 700;
}
.tool-card p {
  margin: 0;
  color: var(--text-muted);
  font-size: 13px;
}
.tool-card__soon {
  opacity: 0.6;
  pointer-events: none;
}
.tool-card__badge {
  display: inline-block;
  margin-top: 8px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  color: var(--text-dim);
  border: 1px solid var(--border-soft);
  padding: 1px 6px;
  background: #eee;
}

/* Features strip */
.features {
  display: grid;
  gap: 16px;
  grid-template-columns: 1fr;
  padding: 20px 0 24px;
  border-top: 1px solid var(--border);
}
@media (min-width: 640px) {
  .features {
    grid-template-columns: repeat(3, 1fr);
  }
}
.feature h3 {
  margin: 0 0 4px;
  font-size: 14px;
  font-weight: 700;
}
.feature p {
  margin: 0;
  font-size: 13px;
  color: var(--text-muted);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 14px 0;
  color: var(--text-dim);
  font-size: 13px;
  background: #fff;
}
.site-footer__inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 12px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  justify-content: space-between;
  align-items: center;
}
.site-footer a {
  color: var(--accent);
  text-decoration: none;
}
.site-footer a:hover {
  text-decoration: underline;
}

/* ——— Tool page ——— */
.tool-page {
  padding: 16px 0 0;
}
.tool-page__header {
  margin-bottom: 14px;
}
.tool-page__header h1 {
  margin: 0 0 6px;
  font-size: 22px;
  font-weight: 700;
  line-height: 1.25;
}
.tool-page__header p {
  margin: 0;
  color: var(--text-muted);
  max-width: 40rem;
  font-size: 14px;
}

/* Two-column tool workspace: left controls, right preview */
.tool-page.wrap {
  max-width: 1040px;
}
.tool-layout {
  display: flex;
  flex-direction: column;
  gap: 0;
}
.tool-layout__left,
.tool-layout__right {
  min-width: 0;
}
@media (min-width: 768px) {
  .tool-layout {
    display: grid;
    grid-template-columns: minmax(280px, 0.42fr) minmax(0, 0.58fr);
    gap: 14px;
    align-items: start;
  }
  .tool-layout__left {
    max-width: 460px;
  }
}

.panel {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  margin-bottom: 12px;
}
.panel--compact {
  padding: 10px 12px;
  margin-bottom: 10px;
}
.panel--compact .panel__title {
  margin-bottom: 6px;
}
.panel__title {
  margin: 0 0 8px;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-dim);
}

/* Inputs */
.input-row {
  display: grid;
  gap: 8px;
  grid-template-columns: 1fr;
}
@media (min-width: 480px) {
  .input-row {
    grid-template-columns: 1fr auto 1fr;
    align-items: end;
  }
}
.field label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 3px;
}
.field input[type="number"],
.field input[type="text"] {
  width: 100%;
  font-family: var(--mono);
  font-size: 16px;
  padding: 10px 12px;
  min-height: 44px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
  outline: none;
  -moz-appearance: textfield;
}
.panel--compact .field input[type="number"],
.panel--compact .field input[type="text"] {
  padding: 8px 10px;
  min-height: 40px;
  font-size: 15px;
}
.panel--compact .swap-btn {
  width: 40px;
  height: 40px;
}
.field input[type="number"]::-webkit-outer-spin-button,
.field input[type="number"]::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}
.field input:focus {
  border-color: var(--accent);
  outline: 1px solid var(--accent);
}
.field input::placeholder {
  color: #aaa;
}
.swap-btn {
  align-self: end;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text-muted);
  cursor: pointer;
  display: grid;
  place-items: center;
  font-size: 14px;
  margin-bottom: 0;
}
.swap-btn:hover {
  border-color: #999;
  color: var(--text);
  background: #f0f0f0;
}
@media (max-width: 479px) {
  .swap-btn {
    width: 100%;
    height: 44px;
  }
}

/* Presets — quiet list / name + px (dense in left column) */
.presets {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
}
/* Two-col presets only when left column is wide enough (desktop left ~460px = 1 col feels denser) */
@media (min-width: 560px) and (max-width: 767px) {
  .presets {
    grid-template-columns: 1fr 1fr;
    gap: 4px 6px;
  }
}
.preset {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  width: 100%;
  margin: 0;
  font-family: inherit;
  font-size: 13px;
  font-weight: 500;
  text-align: left;
  padding: 7px 10px;
  min-height: 36px;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
  background: #fff;
  color: var(--text);
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}
.preset__name {
  flex: 1;
  min-width: 0;
  line-height: 1.3;
}
.preset__size {
  flex-shrink: 0;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  color: var(--text-muted);
  line-height: 1.3;
  letter-spacing: 0;
}
.preset:hover {
  border-color: #bbb;
  background: #fafafa;
  color: var(--text);
}
.preset:hover .preset__size {
  color: var(--text-muted);
}
.preset.is-active {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--accent);
  font-weight: 600;
}
.preset.is-active .preset__size {
  color: var(--accent);
  font-weight: 500;
}
.preset:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

/* Preview */
.preview-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 160px;
  padding: 14px;
  background: #fafafa;
  border-radius: var(--radius-sm);
  border: 1px dashed var(--border);
  margin-bottom: 10px;
}
@media (min-width: 768px) {
  .preview-wrap {
    min-height: 200px;
  }
}
.preview-box {
  max-width: 100%;
  max-height: 220px;
  background: #e8f0fa;
  border: 1px solid var(--accent);
  border-radius: var(--radius-sm);
  display: grid;
  place-items: center;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
  transition: width 0.15s, height 0.15s;
}

/* Results */
.results-grid {
  display: grid;
  gap: 8px;
  grid-template-columns: 1fr;
}
@media (min-width: 560px) {
  .results-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
.result-card {
  background: #fafafa;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.result-card__label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--text-dim);
}
.result-card__value {
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  word-break: break-all;
  flex: 1;
}
.result-card__row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 6px;
}

/* Scale table */
.scale-table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.scale-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
.scale-table th,
.scale-table td {
  text-align: left;
  padding: 10px 8px;
  border-bottom: 1px solid var(--border-soft);
}
.scale-table th {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--text-dim);
  background: #fafafa;
}
.scale-table td {
  font-family: var(--mono);
  font-size: 13px;
}
.scale-table tr:last-child td {
  border-bottom: none;
}
.scale-table .copy-cell {
  text-align: right;
  white-space: nowrap;
}

.empty-hint {
  color: var(--text-dim);
  font-size: 13px;
  margin: 0 0 10px;
  text-align: left;
  padding: 8px 0;
}

/* How-to / SEO content */
.seo-block {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}
.seo-block h2 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
}
.seo-block h3 {
  margin: 14px 0 4px;
  font-size: 14px;
  font-weight: 700;
}
.seo-block p,
.seo-block li {
  color: var(--text-muted);
  font-size: 14px;
}
.seo-block ul {
  padding-left: 20px;
  margin: 4px 0 0;
}

/* AdSense placeholder */
.ad-slot {
  margin: 12px 0;
  min-height: 0;
}

.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;
}