/* === Design Tokens === */
:root {
  --bg-primary: #0f172a;
  --bg-surface: #1e293b;
  --bg-card: #334155;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --accent-blue: #3b82f6;
  --accent-green: #10b981;
  --font-stack: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --max-width: 1200px;
  --section-padding: 5rem 1.5rem;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-stack);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  font-weight: 400;
}

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

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

/* === Typography === */
h1, h2, h3 { font-weight: 700; line-height: 1.2; }
h1 { font-size: 3rem; }
h2 { font-size: 2rem; margin-bottom: 1rem; }
h3 { font-size: 1.25rem; margin-bottom: 0.5rem; }

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

/* === Nav === */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(148, 163, 184, 0.1);
  padding: 1rem 0;
}

.nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
}

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

.nav-links {
  display: flex;
  list-style: none;
  gap: 2rem;
  align-items: center;
}

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

.nav-links a:hover { color: var(--text-primary); text-decoration: none; }

.nav-cta {
  background: var(--accent-blue);
  color: var(--text-primary) !important;
  padding: 0.5rem 1.25rem;
  border-radius: 6px;
  font-weight: 600;
  transition: background 0.2s;
}

.nav-cta:hover { background: #2563eb; text-decoration: none !important; }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
}

/* === Hero === */
.hero {
  padding: 10rem 1.5rem 6rem;
  text-align: center;
  background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-surface) 100%);
}

.hero h1 { margin-bottom: 1.5rem; }
.hero h1 span { color: var(--accent-blue); }

.hero p {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 2rem;
}

.hero-cta {
  display: inline-block;
  background: var(--accent-blue);
  color: var(--text-primary);
  padding: 0.875rem 2rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 1.1rem;
  transition: background 0.2s;
}

.hero-cta:hover { background: #2563eb; text-decoration: none; }

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

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.service-card {
  background: var(--bg-card);
  padding: 2rem;
  border-radius: 12px;
  border: 1px solid rgba(148, 163, 184, 0.1);
  transition: transform 0.2s, border-color 0.2s;
}

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

.service-card svg {
  width: 48px;
  height: 48px;
  margin-bottom: 1rem;
  color: var(--accent-blue);
}

.service-card p { color: var(--text-secondary); font-size: 0.95rem; }

/* === How It Works === */
.how-it-works { text-align: center; }

.steps {
  display: flex;
  justify-content: center;
  gap: 3rem;
  margin-top: 3rem;
  flex-wrap: wrap;
}

.step {
  flex: 1;
  max-width: 300px;
  min-width: 200px;
}

.step-number {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: var(--accent-blue);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 auto 1rem;
}

.step h3 { color: var(--accent-green); }
.step p { color: var(--text-secondary); font-size: 0.95rem; }

/* === Stats === */
.stats { background: var(--bg-surface); }

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  text-align: center;
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--accent-blue);
}

.stat-label { color: var(--text-secondary); font-size: 0.95rem; }

/* === About === */
.about p {
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto 1rem;
  text-align: center;
}

/* === Contact === */
.contact { background: var(--bg-surface); }

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  margin-top: 2rem;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.contact-form input,
.contact-form textarea {
  background: var(--bg-card);
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: 8px;
  padding: 0.875rem 1rem;
  color: var(--text-primary);
  font-family: var(--font-stack);
  font-size: 1rem;
  transition: border-color 0.2s;
}

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

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

.contact-form button {
  background: var(--accent-blue);
  color: var(--text-primary);
  border: none;
  padding: 0.875rem 2rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: background 0.2s;
  align-self: flex-start;
}

.contact-form button:hover { background: #2563eb; }

.contact-info { color: var(--text-secondary); }
.contact-info h3 { color: var(--text-primary); margin-bottom: 1rem; }
.contact-info p { margin-bottom: 0.75rem; }

.form-success {
  display: none;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid var(--accent-green);
  border-radius: 8px;
  padding: 1.5rem;
  text-align: center;
  color: var(--accent-green);
}

.form-success.visible { display: block; }

/* === Footer === */
.footer {
  background: var(--bg-primary);
  border-top: 1px solid rgba(148, 163, 184, 0.1);
  padding: 2rem 0;
}

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

.footer-links {
  display: flex;
  list-style: none;
  gap: 1.5rem;
}

.footer-links a { color: var(--text-secondary); font-size: 0.9rem; }
.footer-links a:hover { color: var(--text-primary); }

.footer-social {
  display: flex;
  gap: 1rem;
}

.footer-social a {
  color: var(--text-secondary);
  transition: color 0.2s;
}

.footer-social a:hover { color: var(--accent-blue); }

.footer-social svg { width: 20px; height: 20px; }

.footer-copy { color: var(--text-secondary); font-size: 0.85rem; width: 100%; text-align: center; margin-top: 1rem; }

/* === Responsive === */
@media (max-width: 768px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.5rem; }

  .nav-links { display: none; }
  .nav-links.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    padding: 1rem;
    border-bottom: 1px solid rgba(148, 163, 184, 0.1);
  }

  .nav-toggle { display: block; }

  .hero { padding: 8rem 1.5rem 4rem; }
  .contact-grid { grid-template-columns: 1fr; }
  .steps { flex-direction: column; align-items: center; }
}