:root {
  /* Palette E: Jet Black + Gold + Warm Grey + White */
  --da-color-bg: #000000;
  --da-color-bg-soft: #181818;
  --da-color-border: #2d2d2d;
  --da-color-gold: #d4a017;
  --da-color-text-dark: #181818; /* text on white */
  --da-color-text-light: #fafafa; /* text on dark */
  --da-color-muted: #a3a3a3;
  --da-color-white: #ffffff;

  --da-font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --da-radius-lg: 18px;
  --da-radius-md: 12px;
  --da-radius-sm: 8px;
  --da-shadow-soft: 0 22px 45px rgba(0, 0, 0, 0.55);
  --da-transition-fast: 150ms ease-out;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

.da-body {
  min-height: 100vh;
  font-family: var(--da-font-sans);
  background: radial-gradient(circle at top left, #111 0, #000 40%, #000 100%);
  color: var(--da-color-text-light);
}

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

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

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--da-color-gold);
  outline-offset: 3px;
}

/* Header */

.da-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(0, 0, 0, 0.96);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  backdrop-filter: blur(16px);
}

.da-header-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0.9rem 1.25rem;
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.da-logo-wrap {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.da-logo-img {
  width: 88px;  /* twice original size */
  height: 88px;
}

.da-logo-text {
  display: flex;
  flex-direction: column;
}

.da-logo-title {
  font-weight: 600;
  letter-spacing: 0.04em;
}

.da-logo-subtitle {
  font-size: 0.75rem;
  color: var(--da-color-muted);
}

.da-nav {
  margin-left: auto;
  display: flex;
  gap: 1rem;
  align-items: center;
}

.da-nav-link {
  font-size: 0.9rem;
  color: var(--da-color-muted);
  padding: 0.25rem 0.5rem;
  border-radius: 999px;
  transition: color var(--da-transition-fast), background var(--da-transition-fast);
}

.da-nav-link:hover {
  color: var(--da-color-text-light);
  background: rgba(255, 255, 255, 0.04);
}

.da-hamburger {
  margin-left: 0.5rem;
  width: 40px;
  height: 40px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: 0;
  background: #000;
  cursor: pointer;
  transition: border-color var(--da-transition-fast), background var(--da-transition-fast), transform var(--da-transition-fast);
}

.da-hamburger span {
  display: block;
  width: 16px;
  height: 2px;
  border-radius: 999px;
  background: var(--da-color-text-light);
}

.da-hamburger:hover {
  background: #141414;
  border-color: var(--da-color-gold);
  transform: translateY(-1px);
}

/* Layout */

.da-main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2.5rem 1.25rem 3.5rem;
}

/* Hero */

.da-hero {
  padding: 2.5rem 1.75rem 2.75rem;
  border-radius: 1.75rem;
  background: linear-gradient(135deg, #000000, #181818 40%, #262626 100%);
  box-shadow: var(--da-shadow-soft);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.da-hero-title {
  font-size: clamp(2.2rem, 3vw + 1.4rem, 3rem);
  margin: 0 0 0.75rem;
}

.da-hero-title span {
  color: var(--da-color-gold);
}

.da-hero-tagline {
  margin: 0 0 1.75rem;
  max-width: 42rem;
  color: var(--da-color-muted);
}

/* Buttons */

.da-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.7rem 1.3rem;
  border-radius: 999px;
  font-size: 0.9rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background var(--da-transition-fast), color var(--da-transition-fast), border-color var(--da-transition-fast), transform var(--da-transition-fast), box-shadow var(--da-transition-fast);
}

.da-btn-primary {
  background: var(--da-color-gold);
  color: #000;
  border-color: var(--da-color-gold);
  box-shadow: 0 14px 30px rgba(212, 160, 23, 0.45);
}

.da-btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 18px 40px rgba(212, 160, 23, 0.6);
}

.da-btn-ghost {
  background: transparent;
  color: var(--da-color-text-light);
  border-color: rgba(255, 255, 255, 0.18);
}

.da-btn-ghost:hover {
  background: rgba(255, 255, 255, 0.06);
}

.da-btn-sm {
  padding: 0.45rem 0.9rem;
  font-size: 0.8rem;
}

/* Sections */

.da-section {
  margin-top: 2.75rem;
}

.da-section-light {
  background: var(--da-color-white);
  color: var(--da-color-text-dark);
  border-radius: 1.5rem;
  padding: 2rem 1.75rem 2.1rem;
  box-shadow: 0 22px 45px rgba(0, 0, 0, 0.35);
}

.da-section-dark {
  background: var(--da-color-bg-soft);
  color: var(--da-color-text-light);
  border-radius: 1.5rem;
  padding: 2rem 1.75rem 2.1rem;
  box-shadow: 0 22px 45px rgba(0, 0, 0, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.da-section-header {
  margin-bottom: 1.5rem;
}

.da-section-header h2 {
  margin: 0 0 0.4rem;
  font-size: 1.4rem;
}

.da-section-header p {
  margin: 0;
  font-size: 0.95rem;
  color: inherit;
  opacity: 0.78;
}

/* Grid & Cards */

.da-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.2rem;
}

.da-card {
  border-radius: 1rem;
  padding: 1.15rem 1.1rem 1.2rem;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(0, 0, 0, 0.05);
}

.da-section-light .da-card {
  background: #f9fafb;
  border-color: #e5e7eb;
}

.da-card-outline {
  background: transparent;
  border-color: var(--da-color-border);
}

.da-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
}

.da-card p {
  margin: 0 0 0.75rem;
  font-size: 0.92rem;
  opacity: 0.88;
}

.da-card-link {
  font-size: 0.85rem;
  color: var(--da-color-gold);
}

.da-card-actions {
  margin-top: 0.6rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

/* Split layout */

.da-section-split .da-split {
  display: grid;
  grid-template-columns: minmax(0, 2.2fr) minmax(0, 1.4fr);
  gap: 1.75rem;
}

.da-list {
  list-style: none;
  padding: 0;
  margin: 0.4rem 0 0;
}

.da-list li {
  font-size: 0.9rem;
  margin-bottom: 0.4rem;
  position: relative;
  padding-left: 1.1rem;
}

.da-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: var(--da-color-gold);
}

/* Footer */

.da-footer {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: 1.2rem 1.25rem 1.6rem;
  background: #000;
  color: var(--da-color-muted);
}

.da-footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  font-size: 0.8rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  align-items: center;
}

.da-footer-sep {
  opacity: 0.5;
}

/* Responsive */

@media (max-width: 768px) {
  .da-header-inner {
    padding-inline: 1rem;
  }

  .da-nav {
    display: none;
  }

  .da-hero {
    padding: 1.9rem 1.35rem 2.1rem;
  }

  .da-main {
    padding-inline: 1rem;
  }

  .da-section-light,
  .da-section-dark {
    padding-inline: 1.35rem;
  }

  .da-section-split .da-split {
    grid-template-columns: minmax(0, 1fr);
  }
}