:root {
  --color-bg: #ffffff;
  --color-bg-alt: #f5f7fa;
  --color-text: #1f2430;
  --color-text-muted: #5a6472;
  --color-primary: #2b6cb0;
  --color-primary-dark: #1d4f8a;
  --color-border: #e2e6ea;
  --header-height: 64px;
  --max-width: 1100px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
}

.logo {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-primary);
  text-decoration: none;
}

.site-nav ul {
  list-style: none;
  display: flex;
  gap: 24px;
  margin: 0;
  padding: 0;
}

.site-nav a {
  text-decoration: none;
  color: var(--color-text);
  font-weight: 500;
}

.site-nav a:hover {
  color: var(--color-primary);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 26px;
  height: 20px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

.nav-toggle span {
  display: block;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
}

/* Hero */
.hero {
  padding: 96px 0;
  text-align: center;
  background: linear-gradient(180deg, var(--color-bg-alt), var(--color-bg));
}

.hero h1 {
  font-size: 2.5rem;
  margin-bottom: 16px;
}

.hero .lead {
  font-size: 1.15rem;
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto 32px;
}

.btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: 6px;
  text-decoration: none;
  font-weight: 600;
  transition: background 0.15s ease-in-out;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}

.btn-primary:hover {
  background: var(--color-primary-dark);
}

/* Sections */
.section {
  padding: 72px 0;
}

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

.section h2 {
  font-size: 2rem;
  margin-bottom: 24px;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  margin-top: 32px;
}

.card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 24px;
}

.card h3 {
  margin-top: 0;
  color: var(--color-primary);
}

/* Schedule table */
.schedule {
  border-collapse: collapse;
  margin-top: 24px;
  width: 100%;
  max-width: 480px;
}

.schedule th,
.schedule td {
  text-align: left;
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-border);
}

.schedule th {
  color: var(--color-text-muted);
  font-weight: 600;
}

/* Contact */
.contact-list {
  list-style: none;
  padding: 0;
  margin-top: 24px;
}

.contact-list li {
  padding: 8px 0;
  border-bottom: 1px solid var(--color-border);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 24px 0;
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

/* Responsive nav */
@media (max-width: 720px) {
  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    display: none;
  }

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

  .site-nav ul {
    flex-direction: column;
    gap: 0;
    padding: 8px 20px 16px;
  }

  .site-nav li {
    padding: 12px 0;
    border-bottom: 1px solid var(--color-border);
  }

  .hero {
    padding: 64px 0;
  }

  .hero h1 {
    font-size: 2rem;
  }
}