:root {
  --color-primary: #0170b9;
  --color-primary-dark: #00598f;
  --color-bg: #ffffff;
  --color-bg-alt: #f5f5f5;
  --color-text: #3a3a3a;
  --color-muted: #6e6e6e;
  --color-danger-bg: #fff5f5;
  --color-danger-border: #c53030;
  --radius-sm: 4px;
  --radius-md: 8px;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --transition-fast: 150ms ease-out;
  --max-width: 1100px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

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

a:hover,
a:focus-visible {
  color: var(--color-primary-dark);
  text-decoration: underline;
}

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

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header & navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background-color: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid #e5e5e5;
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 0;
  gap: 1rem;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: inherit;
}

.logo__text {
  font-weight: 600;
  font-size: 0.95rem;
}

.logo img {
  border-radius: 50%;
}

/* Nav */
.site-nav {
  display: none;
}

.site-nav__list {
  list-style: none;
  display: flex;
  gap: 1.5rem;
  padding: 0;
  margin: 0;
}

.site-nav__item a {
  position: relative;
  font-size: 0.95rem;
  font-weight: 500;
  text-decoration: none;
}

.site-nav__item a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 0;
  height: 2px;
  background-color: var(--color-primary);
  transition: width var(--transition-fast);
}

.site-nav__item a:hover::after,
.site-nav__item a:focus-visible::after,
.site-nav__item--current a::after {
  width: 100%;
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid #e5e5e5;
  background-color: #ffffff;
  padding: 0.35rem 0.6rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  gap: 0.45rem;
}

.nav-toggle__icon {
  width: 18px;
  height: 2px;
  background-color: var(--color-text);
  position: relative;
  border-radius: 999px;
}

.nav-toggle__icon::before,
.nav-toggle__icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background-color: var(--color-text);
  border-radius: 999px;
  transition: transform var(--transition-fast), top var(--transition-fast), opacity var(--transition-fast);
}

.nav-toggle__icon::before {
  top: -6px;
}

.nav-toggle__icon::after {
  top: 6px;
}

.nav-toggle.is-open .nav-toggle__icon {
  background-color: transparent;
}

.nav-toggle.is-open .nav-toggle__icon::before {
  top: 0;
  transform: rotate(45deg);
}

.nav-toggle.is-open .nav-toggle__icon::after {
  top: 0;
  transform: rotate(-45deg);
}

.nav-toggle__label {
  font-size: 0.85rem;
}

.site-nav--open {
  display: block;
}

@media (min-width: 768px) {
  .nav-toggle {
    display: none;
  }
  .site-nav {
    display: block;
  }
}

/* Main layout */
.site-main {
  flex: 1;
}

.hero {
  padding: 4rem 0 3rem;
  background: radial-gradient(circle at top left, #e5f2ff 0, #ffffff 55%);
}

.hero__inner {
  max-width: 800px;
}

.hero__title {
  font-size: clamp(2.2rem, 4vw, 2.8rem);
  margin: 0 0 0.5rem;
}

.hero__subtitle {
  font-size: 1.05rem;
  color: var(--color-muted);
  margin: 0 0 1.5rem;
}

.notice {
  padding: 1.25rem 1.5rem;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.notice--closed {
  background-color: var(--color-danger-bg);
  border-left: 4px solid var(--color-danger-border);
}

.notice p {
  margin: 0.25rem 0;
}

.section {
  padding: 2.75rem 0;
}

.section--light {
  background-color: var(--color-bg-alt);
}

.section__title {
  font-size: 1.6rem;
  margin-top: 0;
  margin-bottom: 1rem;
}

.info-list {
  list-style: none;
  padding: 0;
  margin: 1rem 0 1.5rem;
}

.info-list li {
  margin-bottom: 0.35rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.7rem 1.4rem;
  border-radius: 999px;
  border: none;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: #ffffff;
  font-weight: 500;
  font-size: 0.95rem;
  cursor: pointer;
  text-decoration: none;
  box-shadow: 0 6px 16px rgba(1, 112, 185, 0.25);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
}

.btn:hover,
.btn:focus-visible {
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: 0 10px 24px rgba(1, 112, 185, 0.3);
}

/* FAQ */
.faq {
  display: grid;
  gap: 1rem;
}

.faq-item {
  background-color: #ffffff;
  padding: 1rem 1.1rem;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.faq-item__question {
  font-size: 1.05rem;
  margin: 0 0 0.25rem;
}

/* Utility */
.text-center {
  text-align: center;
}

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

/* Footer */
.site-footer {
  border-top: 1px solid #e5e5e5;
  background-color: #f9f9f9;
  padding: 1.75rem 0;
  margin-top: 2rem;
}

.site-footer__inner {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  font-size: 0.9rem;
}

.site-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem;
  margin-top: 0.75rem;
}

.site-footer__links {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.site-footer__links a {
  text-decoration: none;
}

@media (min-width: 640px) {
  .site-footer__inner {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-start;
  }
}

/* Page layouts */
.page-header {
  padding: 2.5rem 0 1.5rem;
  background: radial-gradient(circle at top left, #e5f2ff 0, #ffffff 55%);
  border-bottom: 1px solid #e5e5e5;
}

.page-header__title {
  margin: 0 0 0.5rem;
  font-size: clamp(1.8rem, 3vw, 2.1rem);
}

.breadcrumb {
  font-size: 0.85rem;
  color: var(--color-muted);
}

.breadcrumb a {
  color: inherit;
}

.page-content {
  padding: 2.25rem 0 3rem;
}

.page-content h2 {
  margin-top: 2rem;
  margin-bottom: 0.75rem;
  font-size: 1.35rem;
}

.page-content h3 {
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
  font-size: 1.1rem;
}

.page-content p {
  margin-top: 0.25rem;
  margin-bottom: 0.75rem;
}

.page-content ul {
  padding-left: 1.1rem;
}

/* 404 */
.not-found {
  padding: 4rem 0 4.5rem;
  text-align: center;
}

.not-found__code {
  font-size: 4rem;
  margin: 0 0 0.5rem;
}

.not-found__title {
  margin: 0 0 0.5rem;
  font-size: 1.6rem;
}

.not-found__text {
  margin-bottom: 1.5rem;
}

/* Accessibility */
.skip-link {
  position: absolute;
  left: -999px;
  top: 0.5rem;
  padding: 0.5rem 1rem;
  background-color: #000;
  color: #fff;
  z-index: 100;
  border-radius: 999px;
}

.skip-link:focus {
  left: 0.5rem;
}

/* Small screens */
@media (max-width: 480px) {
  .header__inner {
    padding: 0.5rem 0;
  }
  .hero {
    padding-top: 3rem;
  }
}