:root {
    --bg: #08080E;
    --surface: #111119;
    --surface2: #1A1A26;
    --gold: #E9C46A;
    --gold2: #F4A261;
    --teal: #2EC4B6;
    --coral: #FF6B6B;
    --text: #F0EDE6;
    --muted: #7A7A8E;
    --border: rgba(255,255,255,0.08);
    --nav-bg: rgba(8,8,14,0.85);
    --hero-sub: rgba(240,237,230,0.72);
    --section-desc: rgba(240,237,230,0.65);
    --origin-body: rgba(240,237,230,0.7);
    --footer-link: rgba(240,237,230,0.55);
    --mosaic-opacity: 0.45;
    --hero-overlay: linear-gradient(to bottom, rgba(8,8,14,0.15) 0%, rgba(8,8,14,0.82) 100%);
    --card-shadow: none;
    --courses-bg: linear-gradient(135deg, #0D0D18 0%, #08080E 100%);
    --font-display: 'League Spartan', sans-serif;
    --font-accent: 'Old Standard TT', serif;
    --font-body: 'League Spartan', sans-serif;
  }

  [data-theme="light"] {
    --bg: #FFFFFF;
    --surface: #FAFAFA;
    --surface2: #F3F4F6;
    --gold: #1A56A0;
    --gold2: #2771C8;
    --teal: #1A56A0;
    --coral: #C0392B;
    --text: #1E1E1E;
    --muted: #7A7A7A;
    --border: rgba(0,0,0,0.08);
    --nav-bg: rgba(255,255,255,0.96);
    --hero-sub: rgba(30,30,30,0.65);
    --section-desc: rgba(30,30,30,0.6);
    --origin-body: rgba(30,30,30,0.65);
    --footer-link: rgba(30,30,30,0.5);
    --mosaic-opacity: 0.22;
    --hero-overlay: linear-gradient(to bottom, rgba(255,255,255,0.05) 0%, rgba(255,255,255,0.72) 100%);
    --card-shadow: 0 1px 6px rgba(0,0,0,0.07);
    --courses-bg: linear-gradient(135deg, #F3F4F6 0%, #FFFFFF 100%);
  }

  *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

  html { scroll-behavior: smooth; }

  body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    overflow-x: hidden;
  }

  /* ─── NAV ─── */
  nav {
    position: fixed; top: 0; left: 0; right: 0;
    z-index: 100;
    display: flex; align-items: center; justify-content: space-between;
    padding: 1.2rem 4rem;
    background: var(--nav-bg);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    transition: padding 0.3s;
  }
  .nav-logo {
    line-height: 0;
    font-family: var(--font-display);
    font-size: 1.4rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--text);
    text-decoration: none;
  }
  .nav-logo span { color: var(--gold); }
  .nav-links { display: flex; gap: 2.5rem; list-style: none; }
  .nav-links a {
    font-family: var(--font-display);
    font-size: 0.82rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--muted);
    text-decoration: none;
    transition: color 0.2s;
  }
  .nav-links a:hover { color: var(--text); }
  .nav-cta {
    padding: 0.55rem 1.4rem;
    background: var(--gold);
    color: #08080E;
    border-radius: 2px;
    font-family: var(--font-display);
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    text-decoration: none;
    transition: opacity 0.2s;
  }
  .nav-cta:hover { opacity: 0.85; }

  /* ─── MOBILE NAV ─── */
  .nav-hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.3rem;
    z-index: 101;
  }
  .nav-hamburger span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: transform 0.3s, opacity 0.3s;
  }
  .nav-mobile-cta-item { display: none; }

  @media (max-width: 768px) {
    nav {
      padding: 1rem 1.5rem;
      flex-wrap: wrap;
      gap: 0;
    }
    .nav-hamburger { display: flex; }
    .nav-links {
      display: none;
      flex-direction: column;
      width: 100%;
      order: 3;
      padding: 0.5rem 0 1rem;
      border-top: 1px solid var(--border);
      margin-top: 0.75rem;
      gap: 0;
    }
    nav.nav-open .nav-links { display: flex; }
    .nav-links li { border-bottom: 1px solid var(--border); }
    .nav-links li:last-child { border-bottom: none; }
    .nav-links a {
      display: block;
      padding: 0.9rem 0;
      font-size: 0.88rem;
    }
    .nav-mobile-cta-item { display: block; }
    .nav-mobile-cta-item a {
      color: var(--gold) !important;
      font-weight: 700;
    }
    .nav-cta { display: none; }
    .theme-toggle-wrap { order: 2; margin-left: auto; margin-right: 1rem; }
    nav.nav-open .nav-hamburger span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
    nav.nav-open .nav-hamburger span:nth-child(2) { opacity: 0; }
    nav.nav-open .nav-hamburger span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  }

/* --- CONTACT MODAL --- */
.modal-overlay {
  position: fixed; inset: 0; z-index: 9999;
  background: rgba(0,0,0,0.65); backdrop-filter: blur(6px);
  display: flex; align-items: center; justify-content: center;
  padding: 1.5rem;
  opacity: 0; pointer-events: none;
  transition: opacity 0.25s;
}
.modal-overlay.open { opacity: 1; pointer-events: all; }
.modal-card {
  background: var(--surface); border: 1px solid var(--border);
  border-top: 3px solid var(--gold);
  max-width: 580px; width: 100%; padding: 2.5rem;
  position: relative;
  transform: translateY(24px); transition: transform 0.25s;
  max-height: 90vh; overflow-y: auto;
}
.modal-overlay.open .modal-card { transform: translateY(0); }
.modal-close {
  position: absolute; top: 1.25rem; right: 1.25rem;
  background: none; border: none; cursor: pointer;
  color: var(--muted); font-size: 1.2rem; line-height: 1;
  padding: 0.3rem 0.5rem; transition: color 0.2s;
}
.modal-close:hover { color: var(--text); }
.modal-title {
  font-family: var(--font-display); font-size: 1.7rem; font-weight: 700;
  letter-spacing: -0.02em; margin-bottom: 0.5rem;
}
.modal-desc { font-size: 0.9rem; color: var(--muted); margin-bottom: 1.75rem; line-height: 1.6; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.form-group { display: flex; flex-direction: column; gap: 0.4rem; margin-bottom: 1rem; }
.form-group label {
  font-family: var(--font-display); font-size: 0.72rem; font-weight: 700;
  letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted);
}
.form-group input,
.form-group select,
.form-group textarea {
  background: var(--bg); border: 1px solid var(--border);
  color: var(--text); font-family: var(--font-body); font-size: 0.9rem;
  padding: 0.7rem 1rem; border-radius: 2px; outline: none;
  transition: border-color 0.2s; width: 100%;
}
.form-group select { appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%237A7A8E' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 1rem center; padding-right: 2.5rem; }
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus { border-color: rgba(233,196,106,0.5); }
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--muted); }
.form-group textarea { resize: vertical; min-height: 100px; }
.form-footer { display: flex; align-items: center; gap: 1.5rem; margin-top: 0.5rem; flex-wrap: wrap; }
.form-submit {
  padding: 0.75rem 2rem; background: var(--gold); color: #08080E;
  font-family: var(--font-display); font-size: 0.82rem; font-weight: 700;
  letter-spacing: 0.1em; text-transform: uppercase; border: none;
  border-radius: 2px; cursor: pointer; transition: opacity 0.2s; white-space: nowrap;
}
.form-submit:hover { opacity: 0.85; }
.form-submit:disabled { opacity: 0.5; cursor: not-allowed; }
.form-privacy { font-size: 0.75rem; color: var(--muted); }
.form-privacy a { color: var(--muted); text-decoration: underline; }
.form-success { text-align: center; padding: 2.5rem 0; }
.form-success h3 { font-family: var(--font-display); font-size: 1.4rem; font-weight: 700; margin: 0.75rem 0 0.5rem; }
.form-success p { color: var(--muted); font-size: 0.9rem; }
@media (max-width: 520px) {
  .form-row { grid-template-columns: 1fr; }
  .modal-card { padding: 1.75rem; }
}
  /* ─── THEME TOGGLE ─── */
  .theme-toggle {
    width: 40px; height: 22px;
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: 999px;
    cursor: pointer;
    position: relative;
    transition: background 0.3s, border-color 0.3s;
    flex-shrink: 0;
  }
  .theme-toggle::after {
    content: '';
    position: absolute; top: 2px; left: 2px;
    width: 16px; height: 16px; border-radius: 50%;
    background: var(--gold);
    transition: transform 0.3s, background 0.3s;
  }
  [data-theme="light"] .theme-toggle { background: rgba(26,86,160,0.08); border-color: rgba(26,86,160,0.2); }
  [data-theme="light"] .theme-toggle::after { transform: translateX(18px); }
  .theme-toggle-wrap { display: flex; align-items: center; gap: 0.5rem; }
  .theme-icon {
    display: flex; align-items: center; color: var(--muted);
    transition: color 0.3s, opacity 0.3s; user-select: none; line-height: 1;
  }
  .theme-icon svg {
    width: 15px; height: 15px; stroke: currentColor; fill: none;
    stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; transition: stroke 0.3s;
  }
  #themeIconDark { opacity: 1; color: var(--gold); }
  [data-theme="light"] #themeIconDark { opacity: 0.35; color: var(--muted); }
  #themeIconLight { opacity: 0.35; }
  [data-theme="light"] #themeIconLight { opacity: 1; color: var(--gold); }

  /* ─── FOOTER ─── */
  footer { background: var(--surface); border-top: 1px solid var(--border); padding: 4rem 4rem 2rem; }
  .footer-grid {
    max-width: 1200px; margin: 0 auto;
    display: grid; grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 3rem; margin-bottom: 3rem;
  }
  .footer-logo { font-family: var(--font-display); font-size: 1.5rem; font-weight: 800; letter-spacing: -0.02em; color: var(--text); margin-bottom: 1rem; }
  .footer-logo span { color: var(--gold); }
  .footer-tagline { font-size: 0.88rem; color: var(--muted); line-height: 1.6; max-width: 260px; margin-bottom: 1.5rem; }
  .social-links { display: flex; gap: 0.8rem; }
  .social-link {
    width: 36px; height: 36px; border: 1px solid var(--border); border-radius: 4px;
    display: flex; align-items: center; justify-content: center;
    font-size: 0.85rem; color: var(--muted); text-decoration: none;
    transition: border-color 0.2s, color 0.2s;
  }
  .social-link:hover { border-color: var(--gold); color: var(--gold); }
  .footer-col h4 {
    font-family: var(--font-display); font-size: 0.72rem; font-weight: 700;
    letter-spacing: 0.15em; text-transform: uppercase; color: var(--muted); margin-bottom: 1.2rem;
  }
  .footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 0.6rem; }
  .footer-col a { font-size: 0.88rem; color: var(--footer-link); text-decoration: none; transition: color 0.2s; }
  .footer-col a:hover { color: var(--text); }
  .footer-bottom {
    max-width: 1200px; margin: 0 auto; padding-top: 2rem; border-top: 1px solid var(--border);
    display: flex; justify-content: space-between; align-items: center;
    font-size: 0.8rem; color: var(--muted);
  }
  @media (max-width: 900px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
  @media (max-width: 600px) { .footer-grid { grid-template-columns: 1fr; } footer { padding: 3rem 1.5rem 1.5rem; } }

  /* ─── LOGO SWAP ─── */
  .logo-light { display: none; }
  .logo-dark  { display: block; }
  [data-theme="light"] .logo-dark  { display: none; }
  [data-theme="light"] .logo-light { display: block; }