/* ============================================================
   ABOUT US PAGE — about-us.css
   Page-specific styles for about-us.html
   Global variables (--bg-*, --text-*, --border-*, --font-*, etc.)
   are defined in style.css and cascade into this file.
   ============================================================ */

/* Hero */
.about-hero {
  padding: 64px 0 48px;
  border-bottom: 1px solid var(--border-default);
}
.about-hero h1 {
  font-family: var(--font-sans);
  font-size: 42px;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
  color: var(--text-accent);
  margin-top: 12px;
  margin-bottom: 16px;
}
.about-hero .body-text {
  max-width: 560px;
  font-size: 15px;
  line-height: 1.8;
}

/* ---- Generic Section ---- */
.about-section {
  padding: 48px 0;
  border-bottom: 1px solid var(--border-default);
}
.about-section h2 {
  font-family: var(--font-sans);
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-accent);
  margin-top: 8px;
  margin-bottom: 20px;
}

/* Divider icons between paragraphs */
.about-divider-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px 0;
  color: var(--text-dim);
  opacity: 0.45;
}
.about-divider-icon svg {
  display: block;
}
.about-divider-icon img {
  display: block;
  width: 100%;
  max-width: 220px;
  height: auto;
  opacity: 1;
}


/* Text blocks */
.about-text-block p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-primary);
  margin-bottom: 16px;
  max-width: 640px;
}
.about-text-block p:last-child {
  margin-bottom: 0;
}

/* ---- Principles Grid ---- */
.principles-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 4px;
}
.principle-card {
  padding: 24px;
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: 8px;
  transition: border-color var(--duration-fast) ease;
}
.principle-card:hover {
  border-color: var(--border-active);
}
.principle-icon {
  width: 32px;
  height: 32px;
  color: var(--text-accent);
  margin-bottom: 14px;
}
.principle-icon svg {
  width: 100%;
  height: 100%;
  display: block;
}
.principle-title {
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 700;
  color: var(--text-accent);
  margin-bottom: 8px;
}
.principle-desc {
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-label);
}

/* ---- Specs Grid ---- */
.specs-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 28px;
  padding-top: 28px;
  border-top: 1px solid var(--border-default);
}
.spec-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 20px 12px;
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: 8px;
}
.spec-value {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  color: var(--text-accent);
  letter-spacing: -0.02em;
  margin-bottom: 6px;
}
.spec-label {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-dim);
}

/* ---- Education Links ---- */
.edu-links {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-top: 24px;
  border: 1px solid var(--border-default);
  border-radius: 8px;
  overflow: hidden;
}
.edu-link {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 24px;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-default);
  text-decoration: none;
  color: inherit;
  transition: background var(--duration-fast) ease;
}
.edu-link:last-child {
  border-bottom: none;
}
.edu-link:hover {
  background: var(--bg-surface-hover);
}
.edu-link-icon {
  width: 28px;
  height: 28px;
  color: var(--text-accent);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.edu-link-icon svg {
  width: 100%;
  height: 100%;
  display: block;
}
.edu-link-text {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.edu-link-title {
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 700;
  color: var(--text-accent);
}
.edu-link-desc {
  font-family: var(--font-sans);
  font-size: 12px;
  color: var(--text-dim);
}
.edu-link-arrow {
  width: 20px;
  height: 20px;
  color: var(--text-dim);
  flex-shrink: 0;
  transition: transform var(--duration-fast) ease, color var(--duration-fast) ease;
}
.edu-link-arrow svg {
  width: 100%;
  height: 100%;
  display: block;
}
.edu-link:hover .edu-link-arrow {
  transform: translateX(3px);
  color: var(--text-accent);
}

/* ---- Founder Card ---- */
.founder-card {
  display: flex;
  align-items: flex-start;
  gap: 24px;
  margin-top: 4px;
  padding: 28px;
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: 8px;
}
.founder-avatar {
  width: 72px;
  height: 72px;
  flex-shrink: 0;
  border-radius: 50%;
  overflow: hidden;
}
.founder-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center center;
  display: block;
}
.founder-body {
  flex: 1;
  min-width: 0;
}
.founder-name {
  font-family: var(--font-sans);
  font-size: 18px;
  font-weight: 700;
  color: var(--text-accent);
  line-height: 1.2;
}
.founder-role {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-dim);
  margin-top: 4px;
}
.founder-bio {
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-primary);
  margin-top: 12px;
}
.founder-links {
  display: flex;
  gap: 8px;
  margin-top: 14px;
}
.founder-link {
  width: 32px;
  height: 32px;
  min-width: 32px;
  min-height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-dim);
  border: 1px solid var(--border-default);
  border-radius: 6px;
  text-decoration: none;
  transition: color var(--duration-fast) ease, border-color var(--duration-fast) ease;
}
.founder-link:hover {
  color: var(--text-accent);
  border-color: var(--border-active);
}
.founder-link svg {
  width: 15px;
  height: 15px;
  flex-shrink: 0;
  display: block;
}

/* ---- CTA Section ---- */
.about-cta {
  padding: 56px 0;
  text-align: center;
}
.about-cta h2 {
  font-family: var(--font-sans);
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-accent);
  margin-bottom: 12px;
}
.about-cta .body-text {
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-primary);
  max-width: 440px;
  margin: 0 auto;
}
.cta-buttons {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-top: 28px;
}
.cta-btn {
  display: inline-flex;
  align-items: center;
  padding: 10px 24px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  text-decoration: none;
  border-radius: 6px;
  transition: opacity var(--duration-fast) ease;
}
.cta-btn:hover {
  opacity: 0.85;
}
.cta-btn--primary {
  color: var(--bg-main);
  background: var(--text-accent);
}
.cta-btn--secondary {
  color: var(--text-accent);
  background: transparent;
  border: 1px solid var(--border-default);
}
.cta-btn--secondary:hover {
  border-color: var(--border-active);
  opacity: 1;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */

/* Tablet */
@media (max-width: 768px) {
  .about-hero { padding: 48px 0 36px; }
  .about-hero h1 { font-size: 32px; }
  .principles-grid { grid-template-columns: 1fr; }
  .specs-grid { grid-template-columns: 1fr 1fr; }
}

/* Phone */
@media (max-width: 520px) {
  .about-hero { padding: 36px 0 28px; }
  .about-hero h1 { font-size: 26px; }
  .about-hero .body-text { font-size: 14px; }
  .about-section { padding: 32px 0; }
  .about-section h2 { font-size: 22px; }
  .about-text-block p { font-size: 13px; }
  .about-divider-icon img { max-width: 234px; }
  .principle-card { padding: 20px 18px; }
  .principle-icon { width: 26px; height: 26px; margin-bottom: 10px; }
  .principle-title { font-size: 14px; }
  .principle-desc { font-size: 12px; }
  .specs-grid { gap: 10px; margin-top: 20px; padding-top: 20px; }
  .spec-item { padding: 16px 8px; }
  .spec-value { font-size: 18px; }
  .spec-label { font-size: 9px; }
  .edu-link { padding: 14px 18px; gap: 12px; }
  .edu-link-icon { width: 22px; height: 22px; }
  .edu-link-title { font-size: 13px; }
  .edu-link-desc { font-size: 11px; }
  .founder-card { padding: 22px 20px; gap: 18px; }
  .founder-avatar { width: 60px; height: 60px; }
  .founder-name { font-size: 16px; }
  .founder-bio { font-size: 13px; }
  .about-cta { padding: 40px 0; }
  .about-cta h2 { font-size: 24px; }
  .cta-buttons { flex-direction: column; align-items: center; }
}

/* Small phone */
@media (max-width: 380px) {
  .about-hero { padding: 28px 0 22px; }
  .about-hero h1 { font-size: 22px; }
  .about-hero .body-text { font-size: 13px; }
  .about-section { padding: 24px 0; }
  .about-section h2 { font-size: 20px; }
  .about-text-block p { font-size: 12px; }
  .about-divider-icon img { max-width: 208px; }
  .principle-card { padding: 16px 14px; }
  .principle-icon { width: 22px; height: 22px; }
  .principle-title { font-size: 13px; }
  .principle-desc { font-size: 11px; }
  .specs-grid { grid-template-columns: 1fr 1fr; gap: 8px; }
  .spec-item { padding: 14px 6px; }
  .spec-value { font-size: 16px; }
  .founder-card { padding: 20px 16px; gap: 14px; }
  .founder-avatar { width: 52px; height: 52px; }
  .founder-name { font-size: 15px; }
  .founder-bio { font-size: 12px; }
  .about-cta { padding: 32px 0; }
  .about-cta h2 { font-size: 20px; }
  .cta-btn { font-size: 11px; padding: 9px 20px; }
}