/* ═══════════════════════════════════════
   VISUAL DATA SYSTEMS — DESIGN SYSTEM
   Dark theme with faded neon grid
   ═══════════════════════════════════════ */

:root {
  --color-bg: #0a0a0f;
  --color-surface: #12121a;
  --color-text: #e0ddd8;
  --color-text-muted: #8a867e;
  --color-accent: #c8922a;
  --color-accent-light: rgba(200, 146, 42, 0.12);
  --color-accent-dark: #daa84a;
  --color-accent-glow: rgba(200, 146, 42, 0.3);
  --color-border: #1e1e2a;
  --color-neon-grid: rgba(200, 146, 42, 0.22);
  --font-serif: 'Playfair Display', Georgia, 'Times New Roman', serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
  --max-width: 1080px;
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 6rem;
}

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

html {
  font-size: 17px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  position: relative;
}

/* ── Faded neon grid background ── */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  background-image:
    linear-gradient(var(--color-neon-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-neon-grid) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, rgba(0,0,0,0.5) 0%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, rgba(0,0,0,0.5) 0%, transparent 100%);
}

body > * {
  position: relative;
  z-index: 1;
}

img { max-width: 100%; display: block; }
a { color: var(--color-accent-dark); text-decoration: none; }
a:hover { color: var(--color-accent); }

/* ── Typography ── */
h1, h2, h3 {
  font-family: var(--font-serif);
  font-weight: 700;
  line-height: 1.25;
  color: var(--color-text);
}

h1 { font-size: 2.8rem; }
h2 { font-size: 1.9rem; margin-bottom: var(--space-sm); }
h3 { font-size: 1.25rem; margin-bottom: var(--space-xs); }

p { margin-bottom: var(--space-sm); }

/* ── Layout ── */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

section {
  padding: var(--space-xl) 0;
}

section + section {
  border-top: 1px solid var(--color-border);
}

/* ── Navigation ── */
.site-nav {
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--color-border);
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.site-nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
}

.site-nav .logo {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: var(--color-text);
}

.site-nav .logo img {
  height: 44px;
  width: auto;
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  list-style: none;
}

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

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

/* ── Hero ── */
.hero {
  padding: var(--space-xl) 0;
  border-bottom: none;
  text-align: center;
  background: url('images/hero-bg.svg') center center / cover no-repeat;
  position: relative;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 80px;
  background: linear-gradient(to bottom, transparent, var(--color-bg));
  pointer-events: none;
}

.hero h1 {
  max-width: 720px;
  margin: 0 auto var(--space-sm);
  font-family: var(--font-sans);
  font-weight: 600;
}

.hero .subtitle {
  max-width: 600px;
  margin: 0 auto var(--space-md);
  font-size: 1.15rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* ── Buttons ── */
.btn {
  display: inline-block;
  padding: 0.85rem 2rem;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 6px;
  text-decoration: none;
  transition: background 0.2s, transform 0.15s, box-shadow 0.2s;
  cursor: pointer;
  border: none;
}

.btn:hover { transform: translateY(-1px); }

.btn-primary {
  background: var(--color-accent);
  color: #0a0a0f;
}

.btn-primary:hover {
  background: var(--color-accent-dark);
  color: #0a0a0f;
  box-shadow: 0 0 20px var(--color-accent-glow);
}

.btn-outline {
  background: transparent;
  color: var(--color-accent-dark);
  border: 2px solid var(--color-accent);
}

.btn-outline:hover {
  background: var(--color-accent-light);
  color: var(--color-accent-dark);
  box-shadow: 0 0 20px var(--color-accent-glow);
}

/* ── Section text ── */
.section-intro {
  max-width: 660px;
  color: var(--color-text-muted);
  font-size: 1.05rem;
}

/* ── Steps ── */
.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-md);
  margin-top: var(--space-md);
}

.step {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: var(--space-md);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.step:hover {
  border-color: rgba(200, 146, 42, 0.25);
  box-shadow: 0 0 24px rgba(200, 146, 42, 0.06);
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--color-accent-light);
  color: var(--color-accent-dark);
  font-weight: 700;
  font-size: 0.9rem;
  border-radius: 50%;
  margin-bottom: var(--space-sm);
}

.step h3 { font-family: var(--font-serif); }
.step p { color: var(--color-text-muted); margin-bottom: 0; }

/* ── Why-us points ── */
.why-list {
  list-style: none;
  margin-top: var(--space-md);
  display: grid;
  gap: var(--space-sm);
}

.why-list li {
  padding-left: 1.6rem;
  position: relative;
  color: var(--color-text-muted);
  line-height: 1.6;
}

.why-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.55rem;
  width: 8px;
  height: 8px;
  background: var(--color-accent);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--color-accent-glow);
}

/* ── Image Panels ── */
.image-panel {
  margin-top: var(--space-md);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}

.image-panel figure {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  overflow: hidden;
}

.image-panel figure img {
  width: 100%;
  height: 240px;
  object-fit: cover;
}

.image-panel figcaption {
  padding: var(--space-sm);
  font-size: 0.85rem;
  color: var(--color-text-muted);
  text-align: center;
}

/* ── Card Grid (Tech page) ── */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-sm);
  margin-top: var(--space-md);
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: var(--space-md);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.card:hover {
  border-color: rgba(200, 146, 42, 0.25);
  box-shadow: 0 0 24px rgba(200, 146, 42, 0.06);
}

.card h3 {
  font-family: var(--font-serif);
  color: var(--color-accent-dark);
}

.card p {
  color: var(--color-text-muted);
  margin-bottom: 0;
  font-size: 0.95rem;
}

/* ── Privacy callout ── */
.callout {
  background: var(--color-accent-light);
  border-left: 4px solid var(--color-accent);
  border-radius: 0 8px 8px 0;
  padding: var(--space-md);
  margin-top: var(--space-md);
}

.callout p { margin-bottom: 0; color: var(--color-text); }

/* ── CTA Section ── */
.cta-section {
  text-align: center;
}

.cta-section p {
  color: var(--color-text-muted);
  font-size: 1.05rem;
  margin-bottom: var(--space-md);
}

.cta-email {
  display: block;
  margin-top: var(--space-sm);
  font-size: 1rem;
  color: var(--color-accent-dark);
}

/* ── Footer ── */
.site-footer {
  padding: var(--space-md) 0;
  border-top: 1px solid var(--color-border);
  text-align: center;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.site-footer .container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
}

.footer-link {
  font-size: 0.85rem;
  color: var(--color-accent-dark);
}

/* ── Responsive ── */
@media (max-width: 768px) {
  html { font-size: 16px; }
  h1 { font-size: 2rem; }
  h2 { font-size: 1.5rem; }
  section { padding: var(--space-lg) 0; }
  .hero { padding: var(--space-lg) 0; }

  .image-panel {
    grid-template-columns: 1fr;
  }

  .site-nav .container {
    flex-wrap: wrap;
  }

  .nav-links { gap: var(--space-sm); }
}

@media (max-width: 480px) {
  h1 { font-size: 1.7rem; }
  .container { padding: 0 var(--space-sm); }
  .steps { grid-template-columns: 1fr; }
  .card-grid { grid-template-columns: 1fr; }
}