/* ===== Reset & Base ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg: #0b0f14;
  --bg-elevated: #12181f;
  --bg-card: #161d26;
  --border: #1e2833;
  --text: #e8edf2;
  --text-muted: #8b9aab;
  --accent: #3b9eff;
  --accent-soft: rgba(59, 158, 255, 0.12);
  --accent-hover: #5aadff;
  --radius: 12px;
  --radius-sm: 8px;
  --max-width: 1100px;
  --nav-height: 64px;
  --font: 'Inter', system-ui, -apple-system, sans-serif;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

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

img, svg {
  display: block;
}

ul {
  list-style: none;
}

/* ===== Layout ===== */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 5rem 0;
}

.section-header {
  max-width: 560px;
  margin-bottom: 3rem;
}

.section-header h2 {
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 0.35rem 0 0.75rem;
}

.section-desc {
  color: var(--text-muted);
  font-size: 1.05rem;
}

.eyebrow {
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
}

/* ===== Navigation ===== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(11, 15, 20, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 100;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  font-weight: 600;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
}

.logo span {
  color: var(--accent);
  font-weight: 500;
}

.nav-links {
  display: flex;
  gap: 2rem;
}

.nav-links a {
  font-size: 0.9rem;
  color: var(--text-muted);
  transition: color 0.2s;
}

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

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text);
  border-radius: 1px;
  transition: 0.2s;
}

/* ===== Hero ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: calc(var(--nav-height) + 3rem) 0 4rem;
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(59, 158, 255, 0.15), transparent),
    var(--bg);
}

.hero-content {
  max-width: 680px;
}

.hero h1 {
  font-size: clamp(2.25rem, 6vw, 3.5rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin: 0.5rem 0 1rem;
}

.hero-sub {
  font-size: 1.05rem;
  color: var(--accent);
  font-weight: 500;
  margin-bottom: 1.25rem;
}

.hero-desc {
  color: var(--text-muted);
  font-size: 1.1rem;
  max-width: 520px;
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.7rem 1.4rem;
  font-size: 0.95rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
  font-family: inherit;
}

.btn-primary {
  background: var(--accent);
  color: #0b0f14;
}

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

.btn-ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-ghost:hover {
  border-color: var(--text-muted);
  background: var(--bg-elevated);
}

.btn-full {
  width: 100%;
}

/* ===== Services ===== */
.services {
  background: var(--bg);
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  transition: border-color 0.2s, transform 0.2s;
}

.card:hover {
  border-color: #2a3644;
  transform: translateY(-2px);
}

.card-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-soft);
  color: var(--accent);
  border-radius: 10px;
  margin-bottom: 1.25rem;
}

.card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 0.6rem;
  letter-spacing: -0.01em;
}

.card > p {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 1.25rem;
}

.card-list {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.card-list li {
  font-size: 0.875rem;
  color: var(--text-muted);
  padding-left: 1.1rem;
  position: relative;
}

.card-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.7;
}

/* ===== About ===== */
.about {
  background: var(--bg-elevated);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.about-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 3rem;
  align-items: start;
}

.about-text h2 {
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin: 0.35rem 0 1.25rem;
}

.about-text p {
  color: var(--text-muted);
  margin-bottom: 1rem;
  max-width: 480px;
}

.about-stats {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  padding-top: 0.5rem;
}

.stat {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1.1rem 1.25rem;
}

.stat-label {
  display: block;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
}

.stat-value {
  font-weight: 500;
  font-size: 0.95rem;
}

/* ===== Contact ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 3rem;
  align-items: start;
}

.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.form-group {
  margin-bottom: 1.15rem;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 0.4rem;
  color: var(--text-muted);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.7rem 0.9rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: inherit;
  font-size: 0.95rem;
  transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
}

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

.form-group select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%238b9aab' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.9rem center;
  padding-right: 2.2rem;
}

.form-note {
  margin-top: 1rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  text-align: center;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  padding-top: 0.5rem;
}

.info-block h4 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
}

.info-block p {
  font-size: 0.95rem;
}

.info-block a:hover {
  color: var(--accent);
}

.muted {
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* ===== Footer ===== */
.footer {
  border-top: 1px solid var(--border);
  padding: 2.5rem 0;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.875rem;
  margin-top: 0.4rem;
}

.footer-copy {
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* ===== Form success state ===== */
.form-success {
  text-align: center;
  padding: 2rem 1rem;
}

.form-success h3 {
  font-size: 1.15rem;
  margin-bottom: 0.5rem;
}

.form-success p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

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

  .about-grid,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .form-row {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .nav-toggle {
    display: flex;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 1rem 1.5rem;
    gap: 0.5rem;
  }

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

  .nav-links a {
    padding: 0.6rem 0;
  }

  .hero {
    min-height: auto;
    padding-top: calc(var(--nav-height) + 2.5rem);
    padding-bottom: 3.5rem;
  }

  .section {
    padding: 3.5rem 0;
  }

  .hero-actions {
    flex-direction: column;
  }

  .hero-actions .btn {
    width: 100%;
  }
}