/* ===================== NAVIGATION ===================== */
.nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    height: var(--nav-height);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 3rem;
    background: rgba(7, 7, 15, 0.6);
    backdrop-filter: blur(28px);
    -webkit-backdrop-filter: blur(28px);
    border-bottom: 1px solid rgba(200, 169, 126, 0.07);
    transition: background var(--normal) ease,
                border-color var(--normal) ease;
  }
  
  .nav.scrolled {
    background: rgba(7, 7, 15, 0.92);
    border-color: var(--border);
  }
  
  .nav-logo {
    font-family: var(--font-display);
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--accent);
    cursor: pointer;
    letter-spacing: 0.02em;
    position: relative;
    transition: text-shadow var(--normal) ease;
  }
  .nav-logo:hover {
    text-shadow: 0 0 20px var(--accent-glow);
  }
  
  .nav-links {
    display: flex;
    gap: 2.5rem;
    align-items: center;
  }
  
  .nav-links a {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--muted);
    position: relative;
    padding-bottom: 3px;
    transition: color var(--fast) ease;
  }
  
  .nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0;
    width: 0; height: 1px;
    background: var(--accent);
    transition: width var(--normal) var(--ease-out);
  }
  
  .nav-links a:hover { color: var(--text); }
  .nav-links a:hover::after { width: 100%; }
  .nav-links a.active { color: var(--accent); }
  .nav-links a.active::after { width: 100%; }
  
  /* ===================== PAGE SYSTEM ===================== */
  .page {
    display: none;
    min-height: 100vh;
  }
  
  .page.active {
    display: block;
  }
  
  /* ===================== SECTIONS ===================== */
  .section {
    padding: 6rem 3rem;
    max-width: var(--max-width);
    margin: 0 auto;
  }
  
  .section-label {
    font-family: var(--font-mono);
    font-size: 0.66rem;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.9rem;
  }
  
  .section-label::before {
    content: '';
    width: 20px;
    height: 1px;
    background: var(--accent);
    opacity: 0.5;
    flex-shrink: 0;
  }
  
  .section-label::after {
    content: '';
    width: 40px;
    height: 1px;
    background: var(--accent);
    opacity: 0.2;
    flex-shrink: 0;
  }
  
  .section-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 3rem;
  }
  
  /* ===================== FOOTER ===================== */
  footer {
    border-top: 1px solid var(--border);
    padding: 2rem 3rem;
    text-align: center;
    color: var(--muted);
    font-family: var(--font-mono);
    font-size: 0.66rem;
    letter-spacing: 0.1em;
  }
  
  footer .footer-link {
    color: var(--accent);
    cursor: pointer;
    transition: text-shadow var(--fast) ease;
  }
  footer .footer-link:hover {
    text-shadow: 0 0 12px var(--accent-glow);
  }
  
  /* ===================== RESPONSIVE ===================== */
  @media (max-width: 900px) {
    .nav { padding: 0 1.5rem; }
    .nav-links { gap: 1.5rem; }
    .section { padding: 4rem 1.5rem; }
  }
  
  @media (max-width: 640px) {
    .nav-links { gap: 1rem; }
    .nav-links a { font-size: 0.65rem; letter-spacing: 0.1em; }
    footer { padding: 1.5rem 1.5rem; }
  }