/* =====================================================
   EMDS / EMDesigner — shared design system
   White + Electric Blue minimalist theme
   ===================================================== */

/* ---------- Design tokens ---------- */
:root {
  --color-bg: #FFFFFF;
  --color-surface: #F8F9FA;
  --color-surface-2: #F1F4F8;
  --color-border: #E5E9EF;
  --color-text: #0E1726;
  --color-text-muted: #5A6474;
  --color-primary: #007BFF;
  --color-primary-hover: #0066D9;
  --color-primary-soft: #E8F2FF;
  --color-accent: #003366;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;

  --shadow-sm: 0 1px 2px rgba(14, 23, 38, 0.04);
  --shadow-md: 0 6px 20px rgba(14, 23, 38, 0.06);

  --container: 1200px;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  --transition: 180ms cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ---------- Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover { color: var(--color-primary-hover); }

button { font-family: inherit; cursor: pointer; }

/* ---------- Typography ---------- */
h1, h2, h3, h4 {
  margin: 0 0 0.5em;
  color: var(--color-text);
  font-weight: 700;
  letter-spacing: -0.015em;
  line-height: 1.2;
}
h1 { font-size: clamp(2.25rem, 4.2vw, 3.5rem); letter-spacing: -0.025em; }
h2 { font-size: clamp(1.75rem, 3vw, 2.4rem); }
h3 { font-size: 1.3rem; }
p  { margin: 0 0 1em; color: var(--color-text-muted); }

.eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 0.75rem;
}

/* ---------- Layout ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

section {
  padding: 96px 0;
}

.section-surface { background: var(--color-surface); }

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--color-border);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.01em;
}
.nav-brand .logo-mark {
  width: 32px;
  height: 32px;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
  padding: 0;
  margin: 0;
}
.nav-links a {
  color: var(--color-text);
  font-weight: 500;
  font-size: 0.95rem;
}
.nav-links a:hover { color: var(--color-primary); }

.nav-toggle {
  display: none;
  border: none;
  background: transparent;
  padding: 8px;
  color: var(--color-text);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 22px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  transition: all var(--transition);
  white-space: nowrap;
}
.btn-primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: 0 4px 14px rgba(0, 123, 255, 0.25);
}
.btn-primary:hover {
  background: var(--color-primary-hover);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(0, 123, 255, 0.35);
}
.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.btn-outline:hover {
  background: var(--color-primary);
  color: #fff;
}
.btn-ghost {
  background: transparent;
  color: var(--color-text);
}
.btn-ghost:hover { color: var(--color-primary); }
.btn-large { padding: 16px 28px; font-size: 1rem; }

/* ---------- Hero ---------- */
.hero {
  padding: 96px 0 64px;
  background:
    radial-gradient(1200px 500px at 90% -10%, rgba(0, 123, 255, 0.08), transparent 60%),
    radial-gradient(900px 400px at 0% 10%,  rgba(0, 123, 255, 0.05), transparent 60%),
    var(--color-bg);
}
.hero h1 { max-width: 22ch; }
.hero-lede {
  max-width: 60ch;
  font-size: 1.15rem;
  color: var(--color-text-muted);
  margin-bottom: 2rem;
}
.hero-cta { display: flex; gap: 12px; flex-wrap: wrap; }

/* ---------- Two-column (video + cloud box) ---------- */
.split {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}
.video-frame {
  position: relative;
  aspect-ratio: 16 / 9;
  width: 100%;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: linear-gradient(135deg, #0B1B30 0%, #13315C 100%);
  box-shadow: var(--shadow-md);
}
.video-frame iframe,
.video-frame video {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  border: 0;
}
.video-placeholder {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  flex-direction: column; gap: 14px;
  color: rgba(255,255,255,0.9);
}
.play-btn {
  width: 72px; height: 72px;
  border-radius: 50%;
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.3);
  display: flex; align-items: center; justify-content: center;
  transition: all var(--transition);
}
.play-btn:hover { background: rgba(255,255,255,0.25); transform: scale(1.05); }
.play-btn svg { margin-left: 4px; }
.video-caption { font-size: 0.9rem; opacity: 0.8; }

.cta-card {
  background: #fff;
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: 0 10px 30px rgba(0, 123, 255, 0.08);
}
.cta-card h3 { font-size: 1.5rem; }
.cta-card p { margin-bottom: 1.5rem; }
.cta-card .btn { width: 100%; justify-content: center; }

/* ---------- Feature grid / modules ---------- */
.section-heading {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 56px;
}
.section-heading p { font-size: 1.1rem; }

.grid {
  display: grid;
  gap: 24px;
}
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.feature {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all var(--transition);
}
.feature:hover {
  border-color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.feature .icon {
  width: 48px; height: 48px;
  border-radius: 12px;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 18px;
}
.feature h3 { font-size: 1.1rem; margin-bottom: 8px; }
.feature p { font-size: 0.95rem; margin-bottom: 0; }

.module-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  margin-right: 6px;
}

/* ---------- Service / About rows ---------- */
.row-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.row-split img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.credential-list {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0 0;
}
.credential-list li {
  padding-left: 28px;
  position: relative;
  margin-bottom: 12px;
  color: var(--color-text);
}
.credential-list li::before {
  content: '';
  position: absolute;
  left: 0; top: 9px;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--color-primary-soft);
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='none'><path d='M4 8l3 3 5-6' stroke='%23007BFF' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/></svg>");
  background-position: center;
  background-repeat: no-repeat;
}

/* ---------- CTA band ---------- */
.cta-band {
  background: linear-gradient(135deg, #0B1B30 0%, #003366 60%, #007BFF 120%);
  color: #fff;
  border-radius: var(--radius-lg);
  padding: 64px;
  text-align: center;
}
.cta-band h2 { color: #fff; }
.cta-band p { color: rgba(255,255,255,0.85); max-width: 56ch; margin: 0 auto 2rem; }
.cta-band .btn-primary {
  background: #fff;
  color: var(--color-primary);
  box-shadow: 0 6px 20px rgba(0,0,0,0.25);
}
.cta-band .btn-primary:hover { background: var(--color-surface); color: var(--color-primary-hover); }

/* ---------- Contact form ---------- */
.form {
  display: grid;
  gap: 18px;
  max-width: 560px;
}
.form label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text);
  display: block;
  margin-bottom: 6px;
}
.form input,
.form textarea {
  width: 100%;
  padding: 12px 14px;
  font-family: inherit;
  font-size: 0.95rem;
  color: var(--color-text);
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.form input:focus,
.form textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px rgba(0, 123, 255, 0.15);
}
.form textarea { resize: vertical; min-height: 140px; }

/* ---------- Footer ---------- */
.site-footer {
  background: #0B1B30;
  color: rgba(255,255,255,0.75);
  padding: 56px 0 28px;
}
.site-footer h4 { color: #fff; font-size: 0.9rem; letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 14px; }
.site-footer a { color: rgba(255,255,255,0.75); }
.site-footer a:hover { color: #fff; }
.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 40px;
}
.footer-grid ul { list-style: none; padding: 0; margin: 0; }
.footer-grid li { margin-bottom: 8px; font-size: 0.95rem; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 22px;
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.55);
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- Animations ---------- */
.fade-in {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 600ms ease-out, transform 600ms ease-out;
}
.fade-in.is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  section { padding: 72px 0; }
  .split { grid-template-columns: 1fr; gap: 32px; }
  .row-split { grid-template-columns: 1fr; gap: 32px; }
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .cta-band { padding: 48px 28px; }
}
@media (max-width: 640px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 72px; left: 0; right: 0;
    background: #fff;
    flex-direction: column;
    padding: 16px 24px 24px;
    gap: 14px;
    border-bottom: 1px solid var(--color-border);
  }
  .nav-links.open { display: flex; }
  .nav-toggle { display: inline-flex; }
  .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero { padding: 56px 0 40px; }
  .cta-card { padding: 28px; }
  .cta-band { padding: 40px 22px; }
}