:root {
  --bg: #0d0d0d;
  --bg-nav: #121212;
  --bg-card: #161616;
  --text: #f5f5f5;
  --text-muted: #b8b8b8;
  --blue: #2f8fe0;
  --blue-bright: #4fb3ff;
  --border: #262626;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Poppins', 'Segoe UI', Arial, sans-serif;
  line-height: 1.5;
}

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

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

/* ---------- NAVBAR ---------- */
header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 60px;
  background: var(--bg-nav);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  background: #fff;
  padding: 8px 18px;
  border-radius: 6px;
}

.logo svg { width: 26px; height: 26px; }

.logo span {
  font-size: 1.3rem;
  font-weight: 700;
  color: #1a2a4a;
}

.logo span.accent { color: var(--blue); }

nav ul {
  list-style: none;
  display: flex;
  gap: 40px;
}

nav a {
  font-weight: 600;
  font-size: 0.98rem;
  color: var(--text);
  transition: color 0.2s ease;
  padding-bottom: 4px;
  border-bottom: 2px solid transparent;
}

nav a:hover,
nav a.active {
  color: var(--blue-bright);
  border-bottom: 2px solid var(--blue-bright);
}

.btn-chat {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--blue);
  color: #fff;
  font-weight: 700;
  padding: 12px 22px;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  font-size: 0.95rem;
  transition: background 0.2s ease;
}

.btn-chat:hover { background: var(--blue-bright); }

/* ---------- HERO (home page) ---------- */
.hero {
  padding: 140px 60px 160px;
  max-width: 900px;
}

.hero h1 {
  font-size: 3.4rem;
  font-weight: 800;
  line-height: 1.15;
  text-shadow: 0 0 30px rgba(255,255,255,0.25);
  margin-bottom: 28px;
}

.hero p {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 560px;
  margin-bottom: 40px;
}

.btn-cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--blue);
  color: #fff;
  font-weight: 700;
  font-size: 1.05rem;
  padding: 16px 28px;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.2s ease;
}

.btn-cta:hover {
  background: var(--blue-bright);
  transform: translateY(-2px);
}

/* ---------- PAGE HEADER (non-home pages) ---------- */
.page-header {
  padding: 90px 60px 60px;
  max-width: 800px;
}

.page-header h1 {
  font-size: 2.6rem;
  font-weight: 800;
  margin-bottom: 18px;
}

.page-header p {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 560px;
}

/* ---------- SECTIONS ---------- */
section {
  padding: 40px 60px 100px;
}

section h2 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 16px;
}

section > p.section-intro {
  color: var(--text-muted);
  max-width: 620px;
  margin-bottom: 50px;
  font-size: 1.05rem;
}

/* ---------- SERVICE CARDS ---------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px 28px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.card:hover {
  border-color: var(--blue);
  transform: translateY(-4px);
}

.card .icon {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  background: rgba(47,143,224,0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 1.4rem;
}

.card h3 {
  font-size: 1.25rem;
  margin-bottom: 12px;
}

.card p {
  color: var(--text-muted);
  font-size: 0.98rem;
  margin-bottom: 18px;
}

.card ul {
  list-style: none;
  color: var(--text-muted);
  font-size: 0.92rem;
}

.card ul li {
  padding: 4px 0;
  padding-left: 18px;
  position: relative;
}

.card ul li::before {
  content: "\2713";
  position: absolute;
  left: 0;
  color: var(--blue-bright);
}

/* ---------- ABOUT PAGE ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.about-grid .stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 30px;
}

.stat-box {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
}

.stat-box .number {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--blue-bright);
}

.stat-box .label {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-top: 6px;
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

/* ---------- CONTACT PAGE ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
}

.contact-info .item {
  display: flex;
  gap: 16px;
  margin-bottom: 28px;
}

.contact-info .item .icon {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: rgba(47,143,224,0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-info .item h4 {
  font-size: 1.05rem;
  margin-bottom: 4px;
}

.contact-info .item p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

form {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

form label {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 6px;
  display: block;
}

form input,
form textarea {
  width: 100%;
  background: #0d0d0d;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 14px;
  color: var(--text);
  font-family: inherit;
  font-size: 0.95rem;
}

form input:focus,
form textarea:focus {
  outline: none;
  border-color: var(--blue);
}

form textarea { resize: vertical; min-height: 120px; }

form button {
  align-self: flex-start;
}

/* ---------- FOOTER ---------- */
footer {
  border-top: 1px solid var(--border);
  padding: 30px 60px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-muted);
  font-size: 0.9rem;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- RESPONSIVE ---------- */
@media (max-width: 900px) {
  header {
    flex-wrap: wrap;
    padding: 16px 24px;
    gap: 16px;
  }
  nav ul {
    gap: 20px;
    flex-wrap: wrap;
  }
  .hero, .page-header, section {
    padding-left: 24px;
    padding-right: 24px;
  }
  .hero h1 { font-size: 2.3rem; }
  .card-grid,
  .values-grid,
  .about-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }
  .about-grid .stats {
    grid-template-columns: repeat(2, 1fr);
  }
}