:root {
  --color-primary: #1F2A44;
  --color-secondary: #4A5568;
  --color-accent: #2C6E73;
  --color-bg: #F9FAFB;
  --color-surface: #FFFFFF;
  --color-muted: #E5E7EB;
  --color-line: #D1D5DB;
  --color-text: #1F2A44;
  --color-text-soft: #4A5568;
  --radius: 6px;
  --container: 1160px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "Segoe UI", Arial, Helvetica, sans-serif;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.55;
}

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

a { color: inherit; text-decoration: none; }

.container {
  width: min(calc(100% - 40px), var(--container));
  margin: 0 auto;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(249, 250, 251, 0.96);
  border-bottom: 1px solid var(--color-line);
  backdrop-filter: blur(8px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 88px;
  gap: 32px;
}

.brand {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
}

.brand img {
  height: 48px;
  width: auto;
  display: block;
}

.nav {
  display: flex;
  align-items: center;
  gap: 28px;
  flex: 0 0 auto;
}

.nav > a,
.nav-item > a {
  color: var(--color-text-soft);
  font-weight: 500;
  white-space: nowrap;
}

.nav > a:hover,
.nav-item > a:hover {
  color: var(--color-primary);
}

/* Buttons */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border-radius: var(--radius);
  font-weight: 600;
}

.button-primary {
  background: var(--color-primary);
  color: #fff;
}
.button-primary:hover { background: #182239; }

.button-secondary {
  border: 1px solid var(--color-line);
  color: var(--color-primary);
}
.button-secondary:hover { background: #fff; }

/* Layout */
.section { padding: 80px 0; }
.section-alt {
  background: var(--color-surface);
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
}

h1, h2, h3 {
  margin: 0;
  font-weight: 700;
  color: var(--color-primary);
}

h1 { font-size: clamp(2.4rem, 5vw, 4rem); }
h2 { font-size: clamp(1.7rem, 3vw, 2.5rem); margin-bottom: 20px; }
h3 { font-size: 1.1rem; margin-bottom: 10px; }

.section-lead {
  color: var(--color-text-soft);
  margin-bottom: 30px;
}

/* Grid */
.grid-2 { display: grid; grid-template-columns: repeat(2,1fr); gap: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }

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

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

/* Lists */
.plain-list, .check-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.plain-list li, .check-list li {
  padding-left: 18px;
  position: relative;
}

.plain-list li::before, .check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  background: var(--color-accent);
  border-radius: 50%;
}

.service-price {
  color: var(--color-accent);
  font-weight: 700;
  margin-top: 10px;
}

/* Footer */
.site-footer {
  padding: 30px 0;
  border-top: 1px solid var(--color-line);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  color: var(--color-text-soft);
}

/* Responsive */
@media (max-width: 900px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .container { width: calc(100% - 24px); }
  .brand img { height: 44px; }
}

/* Dropdown Navigation */

.nav-item {
  position: relative;
}

.dropdown-toggle::after {
  content: "▾";
  font-size: 0.7rem;
  margin-left: 6px;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 8px 0;
  min-width: 220px;
  display: none;
  flex-direction: column;
  box-shadow: 0 8px 24px rgba(0,0,0,0.06);
}

.dropdown-menu a {
  padding: 10px 16px;
  color: var(--color-text-soft);
  white-space: nowrap;
}

.dropdown-menu a:hover {
  background: var(--color-muted);
  color: var(--color-primary);
}

.nav-item:hover .dropdown-menu {
  display: flex;
}