:root {
  --bg: #0f172a;
  --bg-soft: #111827;
  --card: #ffffff;
  --text: #0f172a;
  --muted: #475569;
  --line: #e5e7eb;
  --accent: #2563eb;
  --accent-dark: #1d4ed8;
  --light: #f8fafc;
  --max: 1100px;
  --radius: 18px;
  --shadow: 0 12px 30px rgba(15, 23, 42, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  color: var(--text);
  background: var(--light);
  line-height: 1.6;
}

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

a:hover {
  color: var(--accent-dark);
}

.container {
  width: min(92%, var(--max));
  margin: 0 auto;
}

.nav {
  background: #ffffff;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 20;
}

.nav-inner {
  width: min(92%, var(--max));
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 0;
}

.brand {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text);
}

.nav-links a {
  margin-left: 18px;
  font-size: 0.95rem;
  color: var(--muted);
}

.hero {
  background: linear-gradient(135deg, #0f172a, #1e293b);
  color: white;
  padding: 80px 0 64px;
}

.hero h1 {
  margin: 0 0 12px;
  font-size: clamp(2rem, 5vw, 3.6rem);
  line-height: 1.1;
}

.hero .subtitle {
  font-size: 1.1rem;
  opacity: 0.95;
  margin-bottom: 20px;
}

.hero .intro {
  max-width: 760px;
  color: #dbeafe;
  font-size: 1.02rem;
}

.hero-actions {
  margin-top: 28px;
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 12px 18px;
  border-radius: 999px;
  font-weight: 700;
  transition: 0.2s ease;
}

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

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

.btn-secondary {
  background: rgba(255,255,255,0.12);
  color: white;
  border: 1px solid rgba(255,255,255,0.18);
}

.btn-secondary:hover {
  background: rgba(255,255,255,0.2);
  color: white;
}

.section {
  padding: 64px 0;
}

.section h2 {
  margin: 0 0 8px;
  font-size: 2rem;
}

.section-lead {
  color: var(--muted);
  max-width: 760px;
  margin-bottom: 28px;
}

.grid {
  display: grid;
  gap: 22px;
}

.grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}

.card h3 {
  margin-top: 0;
  margin-bottom: 10px;
}

.card p {
  color: var(--muted);
  margin-bottom: 16px;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 12px 0 18px;
}

.tag {
  display: inline-block;
  padding: 8px 12px;
  border-radius: 999px;
  background: #eff6ff;
  color: #1d4ed8;
  font-size: 0.88rem;
  font-weight: 700;
}

.project-links {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.mini-list {
  display: grid;
  gap: 14px;
}

.mini-item {
  background: white;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 16px 18px;
}

.mini-item strong {
  display: block;
  margin-bottom: 6px;
}

.footer {
  border-top: 1px solid var(--line);
  padding: 28px 0 40px;
  color: var(--muted);
  font-size: 0.95rem;
  background: #fff;
}

.project-hero {
  background: linear-gradient(135deg, #111827, #1f2937);
  color: white;
  padding: 64px 0 46px;
}

.project-hero h1 {
  margin: 0 0 10px;
  font-size: clamp(2rem, 4vw, 3rem);
}

.project-hero p {
  max-width: 760px;
  color: #dbeafe;
}

.project-content {
  padding: 48px 0 72px;
}

.project-layout {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 24px;
}

.project-block {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  margin-bottom: 22px;
}

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

.project-block ul {
  margin: 0;
  padding-left: 20px;
}

.side-box {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow);
  margin-bottom: 22px;
}

.side-box h3 {
  margin-top: 0;
}

.kpi {
  display: grid;
  gap: 12px;
}

.kpi-item {
  padding: 14px 16px;
  border-radius: 14px;
  background: #f8fafc;
  border: 1px solid var(--line);
}

.kpi-item strong {
  display: block;
  font-size: 1.2rem;
  margin-bottom: 4px;
}

.back-link {
  display: inline-block;
  margin-bottom: 18px;
  font-weight: 700;
}

.contact-list p {
  margin: 8px 0;
}

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

  .nav-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .nav-links a {
    margin-left: 0;
    margin-right: 14px;
  }

  .hero,
  .project-hero {
    padding-top: 56px;
  }
}