:root {
  --bg-top: #f7f0df;
  --bg-bottom: #d9e7ee;
  --spotlight: rgba(255, 255, 255, 0.88);
  --surface: rgba(255, 255, 255, 0.72);
  --surface-strong: rgba(255, 255, 255, 0.92);
  --surface-border: rgba(171, 188, 199, 0.42);
  --text: #23313f;
  --muted: #647483;
  --muted-strong: #506170;
  --accent: #236c79;
  --accent-soft: rgba(35, 108, 121, 0.12);
  --good: #2c9076;
  --bad: #b56262;
  --warn: #c58b4c;
  --shadow: 0 20px 40px rgba(41, 57, 73, 0.12);
  --focus-ring: rgba(100, 132, 163, 0.65);
}

[data-theme="night"] {
  --bg-top: #141d29;
  --bg-bottom: #223244;
  --spotlight: rgba(90, 125, 156, 0.24);
  --surface: rgba(35, 49, 65, 0.76);
  --surface-strong: rgba(42, 58, 76, 0.94);
  --surface-border: rgba(112, 134, 154, 0.4);
  --text: #dde8f2;
  --muted: #9fb2c3;
  --muted-strong: #bfd0df;
  --accent: #8bc5cf;
  --accent-soft: rgba(139, 197, 207, 0.16);
  --good: #67c2a6;
  --bad: #de9a9a;
  --warn: #e4b06c;
  --shadow: 0 20px 44px rgba(6, 11, 18, 0.32);
  --focus-ring: rgba(156, 185, 212, 0.72);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: "Space Grotesk", "Avenir Next", "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(48rem 48rem at 92% -8%, var(--spotlight), transparent 60%),
    linear-gradient(180deg, var(--bg-top), var(--bg-bottom));
}

a {
  color: inherit;
}

button,
input,
select,
textarea {
  font: inherit;
}

.app-shell {
  width: min(1180px, 100%);
  margin: 0 auto;
  padding: 24px 20px 34px;
}

.page-header {
  margin-bottom: 18px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 18px;
}

.topbar__actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.brand-block {
  max-width: 640px;
}

.eyebrow {
  margin: 0;
  color: var(--muted);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

h1,
h2 {
  margin: 0;
}

h1 {
  margin-top: 6px;
  font-size: clamp(1.5rem, 3vw, 2.8rem);
  line-height: 1.05;
}

h2 {
  font-size: 1.05rem;
  line-height: 1.2;
}

.lede,
.panel__copy {
  margin: 10px 0 0;
  color: var(--muted);
  line-height: 1.55;
}

.topnav {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.topnav a {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 12px;
  border-radius: 999px;
  border: 1px solid var(--surface-border);
  background: var(--surface);
  text-decoration: none;
  color: var(--muted-strong);
  transition:
    transform 180ms ease,
    border-color 220ms ease,
    background 220ms ease,
    color 220ms ease;
}

.topnav a:hover {
  transform: translateY(-1px);
}

.topnav a[aria-current="page"] {
  background: var(--surface-strong);
  color: var(--text);
}

.theme-toggle {
  width: 34px;
  height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: 1px solid var(--surface-border);
  background: var(--surface);
  color: var(--muted-strong);
  cursor: pointer;
  padding: 0;
}

.theme-toggle:focus-visible,
.button:focus-visible,
.field input:focus-visible,
.field textarea:focus-visible,
.field select:focus-visible,
.tool-card:focus-visible,
.topnav a:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
}

.theme-toggle__icon {
  font-size: 1rem;
  line-height: 1;
}

.home-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}

.tool-card,
.panel,
.metric-card {
  border: 1px solid var(--surface-border);
  border-radius: 20px;
  background: linear-gradient(160deg, var(--surface-strong), var(--surface));
  box-shadow: var(--shadow);
}

.tool-card {
  display: block;
  min-height: 220px;
  padding: 22px;
  text-decoration: none;
  transition:
    transform 180ms ease,
    border-color 220ms ease,
    background 220ms ease;
}

.tool-card:hover {
  transform: translateY(-2px);
}

.tool-card__eyebrow {
  display: inline-block;
  color: var(--accent);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.tool-card__title {
  display: block;
  margin-top: 14px;
  font-size: 1.28rem;
}

.tool-card__copy {
  margin: 12px 0 0;
  color: var(--muted);
  line-height: 1.6;
}

.tool-layout {
  display: grid;
  gap: 16px;
}

.panel {
  padding: 18px;
}

.panel--wide {
  overflow: hidden;
}

.panel__header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 16px;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.field span {
  color: var(--muted-strong);
  font-size: 0.9rem;
}

.field input,
.field textarea,
.field select,
.preview {
  width: 100%;
  border: 1px solid var(--surface-border);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.55);
  color: var(--text);
  padding: 12px 14px;
  transition: border-color 180ms ease, background 180ms ease;
}

[data-theme="night"] .field input,
[data-theme="night"] .field textarea,
[data-theme="night"] .field select,
[data-theme="night"] .preview {
  background: rgba(23, 33, 45, 0.72);
}

.field textarea,
.preview {
  resize: vertical;
  min-height: 180px;
}

.field--full {
  grid-column: 1 / -1;
}

.field--compact {
  min-width: 220px;
}

.button-row,
.toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.button-row {
  grid-column: 1 / -1;
}

.button-row--tight {
  gap: 10px;
}

.button {
  min-height: 42px;
  padding: 0 16px;
  border-radius: 999px;
  border: 1px solid var(--surface-border);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
}

.button:disabled {
  cursor: not-allowed;
  opacity: 0.6;
}

.button--primary {
  border-color: transparent;
  background: linear-gradient(135deg, var(--accent), #4c91a1);
  color: white;
}

.inline-status {
  color: var(--muted);
  font-size: 0.92rem;
}

.notice {
  margin-bottom: 16px;
  padding: 12px 14px;
  border-radius: 14px;
  background: var(--accent-soft);
  color: var(--muted-strong);
}

.notice--warn {
  background: rgba(197, 139, 76, 0.16);
  color: var(--warn);
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
}

.metric-card {
  padding: 16px;
}

.metric-card__label {
  display: block;
  color: var(--muted);
  font-size: 0.86rem;
}

.metric-card__value {
  display: block;
  margin-top: 10px;
  font-size: clamp(1.05rem, 2vw, 1.5rem);
  line-height: 1.15;
}

.metric-card__sub {
  display: block;
  margin-top: 8px;
  color: var(--muted);
  font-size: 0.84rem;
  line-height: 1.4;
}

.preview {
  margin-top: 14px;
  font-family: "SFMono-Regular", "SF Mono", Consolas, monospace;
}

.table-wrap {
  overflow-x: auto;
}

.results-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 760px;
}

.results-table th,
.results-table td {
  padding: 12px 10px;
  border-top: 1px solid rgba(120, 142, 158, 0.18);
  text-align: left;
  vertical-align: top;
}

.results-table th {
  color: var(--muted);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.table-empty {
  color: var(--muted);
}

.badge {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  padding: 0 10px;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
}

.badge--good {
  background: rgba(44, 144, 118, 0.14);
  color: var(--good);
}

.badge--bad {
  background: rgba(181, 98, 98, 0.14);
  color: var(--bad);
}

.code-cell {
  font-family: "SFMono-Regular", "SF Mono", Consolas, monospace;
  font-size: 0.84rem;
}

@media (max-width: 860px) {
  .topbar {
    flex-direction: column;
  }

  .topbar__actions {
    justify-content: flex-start;
  }

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

  .field--full {
    grid-column: auto;
  }
}

@media (max-width: 640px) {
  .app-shell {
    padding: 16px 12px 20px;
  }

  .tool-card,
  .panel {
    padding: 16px;
    border-radius: 16px;
  }
}