:root {
  --bg: #f2f5f8;
  --card: #ffffff;
  --ink: #15202b;
  --muted: #52616f;
  --line: #d9e2ec;
  --brand: #0f6c66;
  --brand-dark: #0a4d48;
  --accent: #f1f7f4;
  --danger: #a11f2b;
  --shadow: 0 8px 28px rgba(15, 50, 80, 0.08);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  font-size: 16px;
  color: var(--ink);
  background: radial-gradient(circle at top right, #e8f2fb, var(--bg) 45%);
}

a {
  color: var(--brand-dark);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.container {
  width: min(1180px, calc(100% - 2rem));
  margin: 0 auto;
}

.app-header {
  background: linear-gradient(120deg, #0c5f59, #127d75);
  border-bottom: 1px solid rgba(255, 255, 255, 0.25);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  color: #fff;
  font-weight: 700;
}

.brand img {
  width: 1.65rem;
  height: 1.65rem;
}

.nav-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.nav-list a {
  display: inline-block;
  padding: 0.4rem 0.6rem;
  border-radius: 0.4rem;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.35);
}

.nav-list a.active,
.nav-list a:hover {
  background: #fff;
  color: var(--brand-dark);
  text-decoration: none;
}

.app-main {
  padding: 1.25rem 0 2rem;
}

.app-footer {
  border-top: 1px solid var(--line);
  background: #fff;
  padding: 1rem 0;
}

.app-footer .footer-inner {
  width: min(1380px, calc(100% - 2rem));
  display: grid;
  gap: 0.65rem;
}

.app-footer p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.footer-links {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem 1rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.footer-links a {
  font-weight: 600;
  opacity: 0.5;
  transition: opacity 0.2s ease;
}

.footer-links a:hover,
.footer-links a:focus-visible {
  opacity: 0.9;
}

.footer-copy a {
  opacity: 0.5;
  transition: opacity 0.2s ease;
}

.footer-copy a:hover,
.footer-copy a:focus-visible {
  opacity: 0.9;
}

.footer-copy {
  font-size: 0.85rem;
}

@media (max-width: 640px) {
  .footer-links {
    display: grid;
    gap: 0.35rem;
  }
}

.hero {
  background: linear-gradient(145deg, #e9f5f3, #f6faf8);
  border: 1px solid #cfe5df;
  border-radius: 0.8rem;
  padding: 1.2rem;
}

.hero h1 {
  margin: 0;
  font-size: 1.65rem;
}

.hero p {
  margin: 0.7rem 0 0;
  color: var(--muted);
}

.hero.compact h1 {
  font-size: 1.4rem;
}

.stack-lg {
  display: grid;
  gap: 1.1rem;
}

.stack-md {
  display: grid;
  gap: 0.9rem;
}

.stack-sm {
  display: grid;
  gap: 0.55rem;
}

.grid-sections {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.8rem;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 0.75rem;
  padding: 1rem;
  box-shadow: var(--shadow);
}

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

.button-link {
  display: inline-block;
  background: var(--brand);
  color: #fff;
  border-radius: 0.45rem;
  padding: 0.42rem 0.62rem;
}

.button-link:hover {
  background: var(--brand-dark);
  text-decoration: none;
}

.tool-layout {
  display: grid;
  grid-template-columns: 290px minmax(0, 1fr);
  gap: 1rem;
}

@media (min-width: 1200px) {
  .container.tool-layout {
    width: min(1500px, calc(100% - 2rem));
  }
}

.link-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.5rem;
}

.link-list li {
  display: grid;
  gap: 0.2rem;
  border-left: 3px solid #cde6e1;
  padding-left: 0.55rem;
}

.link-list a.active {
  color: var(--brand);
  font-weight: 700;
}

.link-list small {
  color: var(--muted);
  font-size: 0.8rem;
}

[data-tool-filter] input[type="search"] {
  width: 100%;
  margin: 0.5rem 0 0.8rem;
  padding: 0.55rem 0.6rem;
  border-radius: 0.45rem;
  border: 1px solid var(--line);
}

.calc-form {
  display: grid;
  gap: 0.9rem;
}

.form-section {
  border: 1px solid var(--line);
  border-radius: 0.6rem;
  padding: 0.7rem;
}

.form-section legend {
  padding: 0 0.35rem;
  color: var(--brand-dark);
  font-weight: 700;
}

.form-grid {
  display: grid;
  gap: 0.65rem;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
}

.form-grid label {
  display: grid;
  gap: 0.28rem;
  color: #233440;
  font-size: 0.92rem;
}

.form-grid input,
.form-grid select {
  width: 100%;
  padding: 0.48rem 0.55rem;
  border-radius: 0.45rem;
  border: 1px solid var(--line);
  background: #fff;
}

.form-grid small {
  color: var(--muted);
  font-size: 0.78rem;
}

.calc-form button {
  width: fit-content;
  padding: 0.52rem 0.82rem;
  border-radius: 0.45rem;
  border: none;
  background: var(--brand);
  color: #fff;
  font-weight: 700;
  cursor: pointer;
}

.calc-form button:hover {
  background: var(--brand-dark);
}

.result-box {
  margin: 0;
  min-height: 64px;
  max-height: 460px;
  overflow: auto;
  background: #0f1722;
  color: #d4ebff;
  border-radius: 0.55rem;
  padding: 0.8rem;
  font-size: 0.84rem;
  line-height: 1.4;
}

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

.error {
  color: var(--danger);
  font-weight: 700;
}

.full-table {
  width: 100%;
  border-collapse: collapse;
}

.full-table th,
.full-table td {
  border: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
  padding: 0.55rem;
}

.full-table th {
  background: var(--accent);
}

.dose-result-table {
  margin-top: 0.45rem;
}

.dose-table-scroll {
  overflow-x: auto;
}

.dose-table {
  width: 100%;
  min-width: 1280px;
  border-collapse: collapse;
  border: 1px solid #b8c8d8;
}

.dose-table th,
.dose-table td {
  border: 1px solid #b8c8d8;
  text-align: left;
  vertical-align: top;
  padding: 0.5rem 0.55rem;
}

.dose-table thead th {
  background: #dcebf3;
  font-size: 0.82rem;
  white-space: nowrap;
}

.dose-table tbody tr:nth-child(odd) td {
  background: #ffffff;
}

.dose-table tbody tr:nth-child(even) td {
  background: #f4f8fb;
}

.presentation-trigger {
  border: 0;
  background: transparent;
  color: var(--brand-dark);
  cursor: pointer;
  text-decoration: underline;
  text-align: left;
  padding: 0;
  font: inherit;
}

.presentation-trigger:hover {
  color: var(--brand);
}

.presentation-modal {
  width: min(680px, calc(100% - 2rem));
  border: 1px solid var(--line);
  border-radius: 0.75rem;
  padding: 0;
}

.presentation-modal::backdrop {
  background: rgba(8, 19, 33, 0.55);
}

.presentation-modal-content {
  padding: 1rem;
}

.presentation-modal-content > header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem;
}

.presentation-modal-content p {
  margin: 0;
}

.presentation-modal-close {
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 0.45rem;
  cursor: pointer;
  padding: 0.35rem 0.6rem;
}

.plain-list {
  margin: 0;
  padding-left: 1.1rem;
  display: grid;
  gap: 0.35rem;
}

.plain-list.numbered {
  list-style: decimal;
}

@media (max-width: 980px) {
  .tool-layout {
    grid-template-columns: 1fr;
  }

  .header-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}