/* About Us page */
:root {
  --about-bg-start: #0a0a0a;
  --about-bg-end: #141414;
  --about-accent: #e53935;
  --about-accent-soft: #ff6b6b;
  --about-text: #f5f5f5;
  --about-text-muted: #999;
  --about-card-bg: rgba(255, 255, 255, 0.04);
  --about-card-border: rgba(255, 255, 255, 0.08);
}

body {
  font-family: 'Inter', 'Vazirmatn', sans-serif;
  background: var(--about-bg-start);
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(229, 57, 53, 0.12), transparent),
    linear-gradient(180deg, var(--about-bg-start) 0%, var(--about-bg-end) 100%);
  color: var(--about-text);
  min-height: 100vh;
  min-height: 100dvh;
  padding: 1.5rem;
  padding-left: max(1.5rem, env(safe-area-inset-left));
  padding-right: max(1.5rem, env(safe-area-inset-right));
  padding-top: max(4rem, env(safe-area-inset-top));
  padding-bottom: max(1.5rem, env(safe-area-inset-bottom));
}

.bg-glow {
  position: fixed;
  top: -50%;
  left: 50%;
  transform: translateX(-50%);
  width: 120%;
  height: 80%;
  background: radial-gradient(ellipse at center, rgba(229, 57, 53, 0.06) 0%, transparent 60%);
  pointer-events: none;
  z-index: 0;
}

.about-nav {
  position: fixed;
  top: max(0.75rem, env(safe-area-inset-top));
  left: max(0.75rem, env(safe-area-inset-left));
  right: max(0.75rem, env(safe-area-inset-right));
  display: flex;
  justify-content: center;
  z-index: 10;
}

.nav-link {
  color: var(--about-text-muted);
  font-size: 0.9rem;
  text-decoration: none;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  border: 1px solid var(--about-card-border);
  background: var(--about-card-bg);
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}

.nav-link:hover {
  color: var(--about-accent-soft);
  border-color: rgba(229, 57, 53, 0.35);
  background: rgba(229, 57, 53, 0.08);
}

.about-main {
  position: relative;
  z-index: 1;
  max-width: 36rem;
  margin: 0 auto;
}

.about-title {
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 700;
  margin: 0 0 0.25rem;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, var(--about-accent), var(--about-accent-soft));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.about-subtitle {
  font-size: clamp(0.95rem, 2vw, 1.05rem);
  color: var(--about-text-muted);
  margin: 0 0 2rem;
}

.lang-tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.75rem;
  flex-wrap: wrap;
}

.lang-tab {
  flex: 1;
  min-width: 0;
  padding: 0.65rem 1rem;
  font-size: 0.9rem;
  font-family: inherit;
  font-weight: 500;
  color: var(--about-text-muted);
  background: var(--about-card-bg);
  border: 1px solid var(--about-card-border);
  border-radius: 10px;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}

.lang-tab:hover {
  color: var(--about-text);
  border-color: rgba(255, 255, 255, 0.15);
}

.lang-tab.active {
  color: var(--about-accent-soft);
  border-color: rgba(229, 57, 53, 0.5);
  background: rgba(229, 57, 53, 0.1);
}

.lang-tab[data-lang="fa"] {
  font-family: 'Vazirmatn', sans-serif;
}

.about-content {
  position: relative;
  min-height: 12rem;
}

.about-block {
  display: none;
  animation: aboutFade 0.35s ease-out;
}

.about-block.active {
  display: block;
}

@keyframes aboutFade {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.about-heading {
  font-size: 1.15rem;
  font-weight: 600;
  margin: 0 0 1rem;
  color: var(--about-text);
}

.about-block p {
  font-size: 0.95rem;
  line-height: 1.65;
  margin: 0 0 1rem;
  color: rgba(245, 245, 245, 0.9);
}

.about-block p:last-child {
  margin-bottom: 0;
}

.about-block strong {
  color: var(--about-accent-soft);
  font-weight: 600;
}

#about-fa .about-heading,
#about-fa p {
  font-family: 'Vazirmatn', sans-serif;
  text-align: right;
}