:root {
  --bg: #ffffff;
  --text: #0f172a;
  --muted: #475569;

  /* Executive blue palette */
  --primary: #2563eb;       /* core blue */
  --primary-soft: #eff6ff;  /* background tint */
  --accent: #1e40af;        /* darker emphasis */

  --border: #e5e7eb;
  --section-bg: #f8fafc;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

/* Layout */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

.container.narrow {
  max-width: 720px;
}

/* Header */
.header {
  border-bottom: 1px solid var(--border);
  padding: 20px 0;
  background: rgba(255,255,255,0.8);
  backdrop-filter: blur(6px);
}

.logo {
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--primary);
}

/* Hero */
.hero {
  padding: 120px 0 100px;
  background: linear-gradient(
    to bottom,
    var(--primary-soft),
    transparent
  );
}

.hero h1 {
  font-size: 3rem;
  font-weight: 500;
  line-height: 1.2;
  margin-bottom: 24px;
  position: relative;
}

/* Subtle underline accent */
.hero h1::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -12px;
  width: 60px;
  height: 2px;
  background: var(--primary);
}

.hero-sub {
  font-size: 1.1rem;
  color: var(--muted);
  max-width: 640px;
}

/* Sections */
.section {
  padding: 80px 0;
}

.section.muted {
  background: var(--section-bg);
}

.section h2 {
  font-size: 1.6rem;
  font-weight: 500;
  margin-bottom: 20px;
  color: var(--accent);
}

.section p {
  margin-bottom: 16px;
  color: var(--muted);
}

/* Footer */
.footer {
  border-top: 1px solid var(--border);
  padding: 32px 0;
  font-size: 0.9rem;
  color: #64748b;
}

/* Quiet text */
.quiet {
  font-size: 0.9rem;
  color: #94a3b8;
}

/* ------------------------
   Animations (subtle)
------------------------- */

.fade-in {
  animation: fadeIn 1.2s ease-out forwards;
}

.fade-up {
  opacity: 0;
  transform: translateY(24px);
  animation: fadeUp 1s ease-out forwards;
}

.fade-up:nth-of-type(1) { animation-delay: 0.1s; }
.fade-up:nth-of-type(2) { animation-delay: 0.2s; }
.fade-up:nth-of-type(3) { animation-delay: 0.3s; }

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes fadeUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}