:root {
  --bg: #0e0e0e;
  --card: #1a1a1a;
  --text: #f2f2f2;
  --muted: #bcbcbc;
  --accent: #f59e0b;
  --border: #2a2a2a;
  --max-width: 1100px;
  --radius: 12px;
  --space-1: 0.5rem;
  --space-2: 0.75rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2rem;
}

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

html {
  color-scheme: dark;
}

body {
  margin: 0;
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

a {
  color: var(--accent);
  text-decoration-thickness: 2px;
  text-underline-offset: 2px;
}

a:hover,
a:focus-visible {
  text-decoration: none;
}

.site-header,
.site-footer {
  border-bottom: 1px solid var(--border);
}

.site-footer {
  border-top: 1px solid var(--border);
  border-bottom: none;
  margin-top: var(--space-5);
}

.container {
  width: min(100% - 2rem, var(--max-width));
  margin-inline: auto;
}

.header-inner,
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-3) 0;
}

.brand {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.2px;
}

.nav-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.nav-list a {
  display: inline-flex;
  align-items: center;
  min-height: 48px;
  padding: 0 var(--space-3);
  border-radius: 10px;
  background: transparent;
  border: 1px solid transparent;
}

.nav-list a:hover,
.nav-list a:focus-visible {
  border-color: var(--accent);
  outline: none;
}

main {
  padding: var(--space-5) 0;
}

.hero {
  padding: var(--space-4);
  background: linear-gradient(180deg, #171717 0%, var(--card) 100%);
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.hero h1 {
  margin-top: 0;
  margin-bottom: var(--space-2);
  line-height: 1.2;
  font-size: clamp(1.8rem, 5vw, 2.6rem);
}

.hero p {
  margin: 0;
  color: var(--muted);
}

.section-title {
  margin-top: var(--space-5);
  margin-bottom: var(--space-3);
  font-size: clamp(1.4rem, 3vw, 1.8rem);
}

.grid {
  display: grid;
  gap: var(--space-3);
}

.result-grid {
  display: grid;
  gap: var(--space-2);
  grid-template-columns: 1fr;
}

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

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--space-4);
}

.card h2,
.card h3 {
  margin-top: 0;
  line-height: 1.3;
}

.card p {
  color: var(--muted);
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0.65rem 1rem;
  border-radius: 10px;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #1a1a1a;
  font-weight: 700;
  text-decoration: none;
}

.button:hover,
.button:focus-visible {
  background: #ffb739;
  border-color: #ffb739;
  outline: none;
}

.form-grid {
  display: grid;
  gap: var(--space-3);
}

.field {
  display: grid;
  gap: var(--space-1);
}

label {
  font-weight: 600;
}

input,
select {
  min-height: 48px;
  border-radius: 10px;
  border: 1px solid #3a3a3a;
  background: #111;
  color: var(--text);
  padding: 0 0.85rem;
}

input:focus-visible,
select:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.result {
  margin-top: var(--space-3);
  padding: var(--space-3);
  border-radius: 10px;
  background: #121212;
  border: 1px solid #323232;
}

.result strong {
  color: var(--accent);
}

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

th,
td {
  text-align: left;
  padding: 0.8rem;
  border-bottom: 1px solid #2a2a2a;
}

th {
  background: #151515;
}

.chart-table-wrapper {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: var(--space-3) 0;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.chart-table-wrapper table {
  margin: 0;
  min-width: 320px;
}

.chart-table-wrapper thead th {
  position: sticky;
  top: 0;
  z-index: 1;
  background: #151515;
  box-shadow: 0 1px 0 0 var(--border);
}

.meta-list {
  padding-left: 1rem;
}

.breadcrumb {
  margin-bottom: var(--space-3);
  font-size: 0.95rem;
  color: var(--muted);
}

.breadcrumb a {
  color: var(--accent);
}

.guide-links {
  margin-top: var(--space-4);
  padding-top: var(--space-3);
  border-top: 1px solid var(--border);
}

.guide-links h3 {
  margin-top: 0;
  font-size: 1.1rem;
}

.guide-links ul {
  margin: 0;
  padding-left: 1.25rem;
}

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

@media (min-width: 700px) {
  .tool-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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