/* =========================================
   AIRC GLOBAL THEME
   ========================================= */

   :root {
    --bg: #020617;                /* deep cosmic navy */
    --surface: #0f172a;           /* dark slate */
    --header: #111827;            /* header/footer */
    --text: #e5e7eb;              /* light gray */
    --muted: #9ca3af;             /* muted text */
    --accent-gold: #fbbf24;       /* sunrise gold */
    --accent-cyan: #22d3ee;       /* electric blue */
    --border-subtle: rgba(148,163,184,0.25);
  }
  
  /* RESET & BASE */
  *,
  *::before,
  *::after {
    box-sizing: border-box;
  }
  
  body {
    margin: 0;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: radial-gradient(circle at top, #020617 0, #020617 40%, #000 100%);
    color: var(--text);
    line-height: 1.6;
    position: relative;
    overflow-x: hidden;
  }
  
  /* =========================================
     GLOBAL DIAMOND GRID + NODE OVERLAY
     ========================================= */
  
  body::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
  
    /* 1–2: diagonal diamond grid | 3–4: network nodes */
    background-image:
      linear-gradient(135deg, rgba(34,211,238,0.35) 1px, transparent 1px),
      linear-gradient(225deg, rgba(34,211,238,0.25) 1px, transparent 1px),
      radial-gradient(circle,
        rgba(34,211,238,0.9) 0,
        rgba(34,211,238,0.45) 2px,
        transparent 4px),
      radial-gradient(circle,
        rgba(34,211,238,0.6) 0,
        rgba(34,211,238,0.3) 2px,
        transparent 5px);
  
    background-size:
      120px 120px,    /* diagonal line spacing */
      120px 120px,
      120px 120px,    /* main node layer */
      180px 180px;    /* offset secondary node layer */
  
    background-position:
      0 0,
      0 0,
      0 0,
      60px 40px;      /* offset makes pattern less uniform */
  
    opacity: 0.42;
    mix-blend-mode: screen;
  }
  
  /* =========================================
     HEADER
     ========================================= */
  
  .site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 5vw;
    background: linear-gradient(to bottom, rgba(17,24,39,0.9), rgba(17,24,39,0.85));
    border-bottom: 1px solid var(--border-subtle);
    backdrop-filter: blur(12px);
  }
  
  .logo-title {
    display: flex;
    align-items: center;
    gap: 0.85rem;
  }
  
  .logo {
    height: 44px;
    width: auto;
  }
  
  .site-header h1 {
    margin: 0;
    font-size: 1.2rem;
  }
  
  .tagline {
    margin: 0;
    font-size: 0.8rem;
    color: var(--muted);
  }
  
  .nav {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    font-size: 0.9rem;
  }
  
  .nav a {
    color: var(--muted);
    text-decoration: none;
    padding-bottom: 0.2rem;
    border-bottom: 2px solid transparent;
  }
  
  .nav a:hover {
    color: var(--accent-cyan);
    border-color: var(--accent-cyan);
  }
  
  /* =========================================
     HERO (using your image, zoomed)
     ========================================= */
  
  .hero {
    position: relative;
    min-height: 60vh;
    display: flex;
    align-items: center;
    padding: 4rem 5vw 3rem;
    overflow: hidden;
  }
  
  .hero-bg {
    position: absolute;
    inset: 0;
    background-image:
      linear-gradient(to top, rgba(0,0,0,0.85), rgba(0,0,0,0.65)),
      url("../img/network-3885328_1920.jpg");
  
    /* Increase zoom significantly (200% instead of 160%) */
    background-size: 170% auto;
  
    /* Move image UP (lower % = pushes image upward) */
    background-position: center 92%;
  
    filter: saturate(1.2) brightness(1.02);
    z-index: -1;
  }
  
  .hero-content {
    max-width: 800px;
  }
  
  .hero h2 {
    font-size: clamp(2.3rem, 3.1vw, 2.9rem);
    margin-bottom: 1rem;
    text-shadow: 0 10px 30px rgba(0,0,0,0.85);
  }
  
  .hero p {
    max-width: 700px;
    color: #e5e7eb;
    text-shadow: 0 8px 24px rgba(0,0,0,0.9);
  }
  
  .hero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.9rem;
    margin-top: 1.8rem;
  }
  
  /* =========================================
     BUTTONS
     ========================================= */
  
  /* Primary button: Explore Programs (70% transparent gradient) */
  .btn {
    display: inline-block;
    padding: 0.7rem 1.8rem;
    border-radius: 999px;
    background: radial-gradient(
                circle at left,
                rgba(251,191,36,0.50),
                rgba(34,211,238,0.33)); /* 70% opacity */
    color: #020617;
    font-weight: 600;
    text-decoration: none;
    font-size: 0.98rem;
    box-shadow: 0 18px 40px rgba(0,0,0,0.6);
  }
  
  /* if you ever need a fully opaque version, we can add a separate class */
  
  .btn:hover {
    filter: brightness(1.9);
  }
  
  /* Secondary button: Get Involved (glass/dark pill) */
  .btn.btn-outline {
    background: rgba(15,23,42,0.7);
    color: var(--text);
    border: 1px solid rgba(148,163,184,0.8);
    box-shadow: 0 18px 40px rgba(0,0,0,0.6);
  }
  
  /* =========================================
     SECTIONS
     ========================================= */
  
  .section {
    padding: 3rem 5vw;
    background: radial-gradient(circle at top left,
                rgba(56,189,248,0.06),
                transparent 60%);
  }
  
  .section.alt {
    background: radial-gradient(circle at top right,
                rgba(251,191,36,0.06),
                transparent 60%);
  }
  
  .section-title {
    font-size: 1.6rem;
    margin-bottom: 0.5rem;
  }
  
  .section-intro {
    max-width: 720px;
    color: var(--muted);
    margin-bottom: 1.5rem;
  }
  
  /* =========================================
     CARDS
     ========================================= */
  
  .card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
  }
  
  .single-card {
    max-width: 900px;
  }
  
  .card {
    background: linear-gradient(to bottom right,
                rgba(15,23,42,0.96),
                rgba(15,23,42,0.9));
    border-radius: 1rem;
    padding: 1.4rem 1.5rem;
    border: 1px solid var(--border-subtle);
    box-shadow: 0 18px 40px rgba(15,23,42,0.8);
  }
  
  .card h4 {
    margin: 0 0 0.5rem 0;
    font-size: 1.15rem;
  }
  
  .card-meta {
    margin-top: 0.75rem;
    font-size: 0.85rem;
    color: var(--muted);
  }
  
  .text-link {
    display: inline-block;
    margin-top: 0.75rem;
    font-size: 0.9rem;
    color: var(--accent-cyan);
    text-decoration: none;
  }
  
  .text-link:hover {
    text-decoration: underline;
  }
  
  /* =========================================
     TEAM
     ========================================= */
  
  .subheading {
    margin-top: 2rem;
    margin-bottom: 0.75rem;
    font-size: 1.1rem;
  }
  
  .person {
    text-align: left;
  }
  
  .person img {
    width: 80px;
    height: 80px;
    border-radius: 999px;
    object-fit: cover;
    margin-bottom: 0.75rem;
    border: 2px solid rgba(148,163,184,0.4);
  }
  
  .person h5 {
    margin: 0;
    font-size: 1rem;
  }
  
  .role {
    margin: 0.2rem 0 0.5rem;
    font-size: 0.85rem;
    color: var(--accent-cyan);
  }
  
  .bio {
    font-size: 0.9rem;
  }
  
  /* =========================================
     FOOTER
     ========================================= */
  
  .site-footer {
    padding: 1rem 5vw 1.4rem;
    background: #020617;
    border-top: 1px solid var(--border-subtle);
    text-align: center;
    font-size: 0.85rem;
    color: var(--muted);
  }
  
  /* =========================================
     RESPONSIVE
     ========================================= */
  
  @media (max-width: 720px) {
    .site-header {
      flex-direction: column;
      align-items: flex-start;
      gap: 0.75rem;
    }
  
    .nav {
      flex-wrap: wrap;
      gap: 0.75rem;
      font-size: 0.85rem;
    }
  
    .hero {
      padding-top: 3.5rem;
    }
  }