:root {
  --color-bg: #ffffff;
  --color-bg-alt: #f6f7f9;
  --color-text: #1a2233;
  --color-text-muted: #5b6472;
  --color-primary: #0f172a;
  --color-accent: #2563eb;
  --color-accent-light: #eef3ff;
  --color-border: #e5e8ec;
  --max-width: 1080px;
  --radius: 12px;
  font-size: 16px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

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

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

img {
  max-width: 100%;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
header {
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--color-border);
  z-index: 100;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  max-width: var(--max-width);
  margin: 0 auto;
}

.nav-logo {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--color-primary);
}

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

.nav-links a {
  color: var(--color-text);
  font-weight: 500;
  font-size: 0.95rem;
}

.nav-links a:hover {
  color: var(--color-accent);
}

.nav-cta {
  background: var(--color-primary);
  color: #fff !important;
  padding: 10px 18px;
  border-radius: 8px;
  font-weight: 600;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.6rem;
  cursor: pointer;
  color: var(--color-primary);
}

/* Hero */
.hero {
  padding: 96px 0 80px;
  text-align: center;
  background: linear-gradient(180deg, var(--color-accent-light) 0%, #ffffff 70%);
}

.hero h1 {
  font-size: clamp(2rem, 4vw, 2.9rem);
  line-height: 1.2;
  margin: 0 0 20px;
  color: var(--color-primary);
}

.hero p {
  max-width: 620px;
  margin: 0 auto 32px;
  font-size: 1.15rem;
  color: var(--color-text-muted);
}

.btn {
  display: inline-block;
  padding: 14px 28px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 1rem;
}

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

.btn-primary:hover {
  background: #1d4ed8;
}

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

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

h2 {
  font-size: 1.9rem;
  color: var(--color-primary);
  margin-bottom: 16px;
}

.section-intro {
  max-width: 640px;
  color: var(--color-text-muted);
  margin-bottom: 40px;
}

/* About */
.about-text {
  max-width: 720px;
  font-size: 1.05rem;
}

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

.service-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px;
}

.service-card h3 {
  font-size: 1.15rem;
  color: var(--color-primary);
  margin: 0 0 12px;
}

.service-card p {
  color: var(--color-text-muted);
  font-size: 0.97rem;
  margin: 0 0 18px;
}

.service-price {
  font-weight: 600;
  color: var(--color-accent);
  font-size: 0.95rem;
}

/* Project experience */
.experience-box {
  max-width: 760px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px 32px;
  font-size: 1.05rem;
}

/* Contact */
.contact-box {
  max-width: 560px;
  text-align: center;
  margin: 0 auto;
}

.contact-box h2 {
  margin-bottom: 12px;
}

.contact-meta {
  margin-top: 28px;
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.contact-meta div {
  margin-bottom: 4px;
}

/* Footer */
footer {
  border-top: 1px solid var(--color-border);
  padding: 32px 0;
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.footer-row {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-links a {
  color: var(--color-text-muted);
  margin-left: 18px;
}

.footer-links a:first-child {
  margin-left: 0;
}

/* Legal pages */
.legal {
  padding: 56px 0 96px;
  max-width: 720px;
}

.legal h1 {
  font-size: 1.8rem;
  color: var(--color-primary);
}

.legal h2 {
  font-size: 1.2rem;
  margin-top: 36px;
}

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

.legal a.back {
  display: inline-block;
  margin-bottom: 24px;
}

/* Mobile */
@media (max-width: 760px) {
  .nav-links {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    align-items: flex-start;
    padding: 20px 24px;
    gap: 18px;
    display: none;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-toggle {
    display: block;
  }

  .services-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    padding: 64px 0 56px;
  }
}