/* Base Reset */
* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Inter, sans-serif;
  color: #1f2933;
  background-color: #ffffff;
  line-height: 1.6;
}

/* Layout */
.container {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 20px;
}

.about-layout {
  display: flex;
  gap: 48px;
  align-items: flex-start;
}

.about-text {
  flex: 2;
}

.about-portrait {
  float: right;
  width: 240px;
  margin: 0 0 20px 40px;
}

/* Header */
.site-header {
  padding: 24px 0;
  border-bottom: 1px solid #e5e7eb;
}

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

.brand {
  font-weight: 500;
  font-size: 19px;
  letter-spacing: 0.25px;
}

.brand a {
  font-weight: 600;
  text-decoration: none;
  color: #1f2933;
  font-size: 18px;
}

.nav a {
  margin-left: 24px;
  text-decoration: none;
  color: #4b5563;
  font-size: 15px;
}

.nav a:hover {
  color: #1e3a8a;
}

.nav a.active {
  color: #1f2933;
  font-weight: 500;
  pointer-events: none;
}

/* Hero */

.hero {
  position: relative;
  padding: 90px 0 70px 0;
  background:
    linear-gradient(
      to bottom,
      rgba(255,255,255,0.3),
      rgba(255,255,255,0.3)
    ),
    url('images/bg1.webp');

  background-repeat: no-repeat;
  background-size: cover;
  background-position: center;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;

  background: linear-gradient(
    to bottom,
    rgba(255, 255, 255, 0.8) 0%,
    rgba(255, 255, 255, 0.2) 20%,
    rgba(255, 255, 255, 0.2) 50%,
    rgba(255, 255, 255, 0.2) 80%,
    rgba(255, 255, 255, 0.95) 100%
  );
}

.hero .container {
  position: relative;
  z-index: 1;
}

.hero h1 {
  font-size: 40px;
  font-weight: 500;
  line-height: 1.18;
  margin-bottom: 24px;
}

.hero-subtext {
  font-size: 18px;
  color: #4b5563;
}

/* Technical Credibility Anchor */

.tech-anchor {
  margin-top: 32px;
  font-size: 16px;
  color: #6b7280;
  line-height: 1.5;
}


/* Pillars */
.pillars {
  padding: 60px 0;
  border-top: 1px solid #e5e7eb;
  border-bottom: 1px solid #e5e7eb;
}

.pillars-grid {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.pillar h2 {
  font-size: 24px;
  font-weight: 500;
  line-height: 1.2;
  margin-bottom: 16px;
}

.pillar p {
  color: #4b5563;
  font-size: 16px;
}

.principle {
  margin-top: 24px;
  font-weight: 500;
  letter-spacing: 0.2px;
}

/* About */
.about-preview {
  padding: 60px 0;
}

.about-preview h2 {
  font-size: 24px;
  font-weight: 500;
  line-height: 1.2;
  margin-bottom: 16px;
}

.text-link {
  text-decoration: none;
  color: #1e3a8a;
}

.text-link:hover {
  text-decoration: underline;
}

.external-link::after {
  content: "↗";
  font-size: 1.0em;
  margin-left: 0px;
  opacity: 0.45;
}

/* Footer */
.site-footer {
  padding: 40px 0;
  border-top: 1px solid #e5e7eb;
  font-size: 14px;
  color: #6b7280;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-links {
  display: flex;
  gap: 20px;
}

.footer-link {
  text-decoration: none;
  color: #4b5563;
  opacity: 0.85;
}

.footer-link:hover {
  opacity: 1;
  color: #1e3a8a;
}

.footer-link.active {
  opacity: 1;
  color: #111827;
}

/* Contact */
.contact-block {
  margin-top: 32px;
  padding-top: 32px;
}

.contact-primary {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.contact-label {
  font-size: 12px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: #6b7280;
}

.contact-email {
  font-size: 20px;
  font-weight: 500;
  color: #1f2933;
  text-decoration: none;
}

.contact-email:hover {
  color: #1e3a8a;
}

.contact-secondary {
  margin-top: 20px;
  font-size: 14px;
}

.contact-secondary a {
  text-decoration: none;
  color: #4b5563;
}

.contact-secondary a:hover {
  color: #1e3a8a;
}

/* Insights Index */

.insights-index {
  padding: 60px 0;
}

.insight-card {
  padding: 32px 0;
  border-bottom: 1px solid #e5e7eb;
}

.insight-card:last-child {
  border-bottom: none;
}

.insight-card h2 {
  font-size: 22px;
  font-weight: 500;
  line-height: 1.3;
  margin-bottom: 12px;
}

.insight-card h2 a {
  text-decoration: none;
  color: #1f2933;
}

.insight-card h2 a:hover {
  color: #1e3a8a;
}

.insight-summary {
  font-size: 16px;
  color: #4b5563;
  margin-bottom: 14px;
  max-width: 680px;
}

.insight-read {
  font-size: 15px;
  text-decoration: none;
  color: #4b5563;
  letter-spacing: 0.2px;
}

.insight-read:hover {
  color: #1e3a8a;
}