:root {
  --bg: #f6f8fb;
  --surface: #ffffff;
  --surface-2: #f0f4fa;
  --text: #101827;
  --muted: #4f5d75;
  --line: #d8e0ec;
  --brand: #1454ff;
  --brand-2: #00b3a4;
  --danger: #b42318;
  --radius-lg: 18px;
  --radius-md: 12px;
  --radius-sm: 10px;
  --shadow: 0 10px 30px rgba(16, 24, 39, 0.08);
  --content: min(1120px, calc(100% - 2rem));
}

html[data-theme="dark"] {
  --bg: #090f1a;
  --surface: #121a28;
  --surface-2: #1a2434;
  --text: #edf3ff;
  --muted: #9daecc;
  --line: #2d3c53;
  --brand: #5f8dff;
  --brand-2: #2ad4c4;
  --danger: #ff8a80;
  --shadow: 0 16px 38px rgba(0, 0, 0, 0.42);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  font-family: "Inter", "Segoe UI", "SF Pro Text", "Roboto", system-ui, sans-serif;
  background:
    radial-gradient(circle at 0% 0%, color-mix(in srgb, var(--brand) 12%, transparent), transparent 36%),
    radial-gradient(circle at 100% 0%, color-mix(in srgb, var(--brand-2) 12%, transparent), transparent 36%),
    var(--bg);
  line-height: 1.55;
}

a {
  color: inherit;
}

img,
svg {
  display: block;
  max-width: 100%;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  line-height: 1.2;
  letter-spacing: -0.015em;
}

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

.skip-link {
  position: absolute;
  top: -100px;
  left: 10px;
  background: var(--brand);
  color: #fff;
  padding: 0.5rem 0.7rem;
  border-radius: var(--radius-sm);
  z-index: 1000;
  text-decoration: none;
}

.skip-link:focus {
  top: 10px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  border-bottom: 1px solid color-mix(in srgb, var(--line) 80%, transparent);
  background: color-mix(in srgb, var(--surface) 84%, transparent);
  backdrop-filter: blur(9px);
}

.header-inner {
  width: var(--content);
  margin-inline: auto;
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.85rem;
}

.brand {
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.brand img {
  width: 34px;
  height: 34px;
}

.nav-toggle {
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--text);
  border-radius: var(--radius-sm);
  padding: 0.45rem 0.7rem;
  font-weight: 700;
}

.nav-shell {
  width: var(--content);
  margin-inline: auto;
}

.main-nav {
  display: none;
  flex-direction: column;
  gap: 0.35rem;
  padding-bottom: 0.75rem;
}

.main-nav.is-open {
  display: flex;
}

.main-nav a {
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  padding: 0.5rem 0.65rem;
  font-weight: 600;
  color: var(--text);
}

.main-nav a:hover,
.main-nav a:focus-visible,
.main-nav a[aria-current="page"] {
  background: color-mix(in srgb, var(--brand) 10%, var(--surface));
  border-color: var(--line);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.theme-toggle {
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--text);
  border-radius: var(--radius-sm);
  padding: 0.45rem 0.7rem;
  font-weight: 700;
}

.page {
  width: var(--content);
  margin-inline: auto;
  padding: 1rem 0 2.6rem;
}

.section {
  margin-top: 1rem;
}

.hero {
  background: linear-gradient(140deg, color-mix(in srgb, var(--surface) 88%, transparent), color-mix(in srgb, var(--brand-2) 8%, var(--surface)));
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.hero-grid {
  display: grid;
  gap: 1rem;
  padding: 1.2rem;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 800;
  color: color-mix(in srgb, var(--brand) 70%, var(--text));
  font-size: 0.75rem;
}

.hero h1 {
  margin-top: 0.4rem;
  font-size: clamp(1.8rem, 4.5vw, 3.1rem);
}

.hero p {
  margin-top: 0.7rem;
  max-width: 72ch;
}

.hero-media {
  border: 1px solid color-mix(in srgb, var(--line) 78%, transparent);
  border-radius: var(--radius-md);
  overflow: hidden;
  min-height: 210px;
  background: var(--surface-2);
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.actions,
.cta-row {
  margin-top: 1rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.btn {
  border: 1px solid transparent;
  background: var(--surface);
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
  border-radius: var(--radius-sm);
  padding: 0.64rem 0.9rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  cursor: pointer;
}

.btn-primary {
  background: linear-gradient(115deg, var(--brand), var(--brand-2));
  color: #fff;
}

.btn-ghost {
  border-color: var(--line);
  background: var(--surface);
}

.btn-danger {
  border-color: color-mix(in srgb, var(--danger) 35%, var(--line));
  color: var(--danger);
  background: color-mix(in srgb, var(--danger) 10%, var(--surface));
}

.section-head {
  margin-bottom: 0.8rem;
}

.section-head h2 {
  font-size: clamp(1.35rem, 3vw, 2rem);
}

.grid {
  display: grid;
  gap: 0.75rem;
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.card {
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: var(--radius-md);
  padding: 0.9rem;
  box-shadow: 0 3px 10px rgba(11, 20, 33, 0.05);
}

.card h3 {
  margin-top: 0.2rem;
  font-size: 1.08rem;
}

.card p {
  margin-top: 0.42rem;
}

.tool-card {
  display: grid;
  gap: 0.65rem;
}

.tool-icon {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--brand) 7%, var(--surface));
  padding: 0.45rem;
}

.form-shell {
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: var(--radius-md);
  padding: 1rem;
}

.form-grid {
  display: grid;
  gap: 0.7rem;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.field {
  display: grid;
  gap: 0.34rem;
}

label {
  font-weight: 700;
  font-size: 0.92rem;
}

.hint {
  font-size: 0.8rem;
  color: var(--muted);
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid color-mix(in srgb, var(--line) 90%, transparent);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--text);
  font: inherit;
  padding: 0.58rem 0.66rem;
}

textarea {
  min-height: 130px;
  resize: vertical;
}

.inline-actions {
  margin-top: 0.8rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.result-wrap {
  display: grid;
  gap: 0.8rem;
  margin-top: 1rem;
}

.result-card {
  border: 1px solid color-mix(in srgb, var(--brand) 35%, var(--line));
  background: linear-gradient(135deg, color-mix(in srgb, var(--brand) 10%, var(--surface)), color-mix(in srgb, var(--brand-2) 8%, var(--surface)));
  border-radius: var(--radius-md);
  padding: 1rem;
}

.result-value {
  margin-top: 0.3rem;
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  font-weight: 800;
  color: var(--text);
}

.breakdown {
  margin: 0;
  padding: 0;
  list-style: none;
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.breakdown li {
  display: flex;
  justify-content: space-between;
  gap: 0.8rem;
  padding: 0.62rem 0.75rem;
  border-bottom: 1px solid color-mix(in srgb, var(--line) 75%, transparent);
}

.breakdown li:last-child {
  border-bottom: 0;
}

.breakdown strong {
  color: var(--text);
}

.share-strip {
  border: 1px dashed color-mix(in srgb, var(--brand) 45%, var(--line));
  border-radius: var(--radius-md);
  background: color-mix(in srgb, var(--brand) 8%, var(--surface));
  padding: 0.85rem;
}

.share-strip p {
  color: var(--text);
}

.summary-shot {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface);
  padding: 0.85rem;
}

.summary-shot h3 {
  font-size: 0.9rem;
}

.summary-shot p {
  margin-top: 0.4rem;
  color: var(--text);
  font-weight: 700;
}

.notice {
  border: 1px solid color-mix(in srgb, var(--brand) 25%, var(--line));
  border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--brand) 6%, var(--surface));
  padding: 0.65rem 0.72rem;
  color: var(--text);
}

details {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface);
  overflow: hidden;
}

summary {
  cursor: pointer;
  font-weight: 700;
  padding: 0.72rem 0.8rem;
}

details > div {
  border-top: 1px solid var(--line);
  padding: 0.75rem 0.82rem;
}

.faq-item + .faq-item {
  margin-top: 0.7rem;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface);
}

table {
  width: 100%;
  min-width: 680px;
  border-collapse: collapse;
}

th,
td {
  padding: 0.58rem;
  border-bottom: 1px solid color-mix(in srgb, var(--line) 70%, transparent);
  text-align: left;
}

th {
  color: var(--text);
  background: color-mix(in srgb, var(--brand) 6%, var(--surface));
}

.footer {
  margin-top: 1.4rem;
  border-top: 1px solid color-mix(in srgb, var(--line) 70%, transparent);
}

.footer-inner {
  width: var(--content);
  margin-inline: auto;
  padding: 1.15rem 0 1.8rem;
  display: grid;
  gap: 0.7rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.footer-links a {
  text-decoration: none;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.32rem 0.56rem;
  font-size: 0.86rem;
  color: var(--muted);
}

.success {
  margin-top: 0.7rem;
  border: 1px solid color-mix(in srgb, #1f9d5a 50%, var(--line));
  background: color-mix(in srgb, #1f9d5a 14%, var(--surface));
  color: var(--text);
  border-radius: var(--radius-sm);
  padding: 0.6rem 0.7rem;
}

.hide {
  display: none !important;
}

:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--brand) 44%, transparent);
  outline-offset: 2px;
}

@media (min-width: 940px) {
  .header-inner {
    min-height: 84px;
  }

  .nav-toggle {
    display: none;
  }

  .nav-shell {
    width: auto;
    margin: 0;
  }

  .main-nav {
    display: flex;
    flex-direction: row;
    align-items: center;
    width: auto;
    gap: 0.2rem;
    padding-bottom: 0;
  }

  .hero-grid {
    grid-template-columns: 1.2fr 0.95fr;
    align-items: center;
  }
}

@media (max-width: 600px) {
  .actions .btn,
  .cta-row .btn,
  .inline-actions .btn {
    flex: 1 1 100%;
  }

  table {
    min-width: 560px;
  }
}