/* ===============================
   Base theme (with hard fallbacks)
   =============================== */

  /* Optional: base tokens (used if no data-theme set) */
  :root{
    --fallback-a: #3b82f6;
    --fallback-b: #8b5cf6;

    --bg: #0b0d12;
    --bg-soft: #10131a;
    --text: #e6e9f2;
    --muted: #a6adc8;
    --primary: #6aa0ff;
    --primary-strong: #3b82f6;
    --accent: #8b5cf6;

    --hue: 230;
    --grad-a: hsl(var(--hue), 80%, 55%);
    --grad-b: hsl(calc(var(--hue) + 60), 80%, 55%);

    --gradient-angle: 135deg;

    /* brand-driven gradient stops (fallbacks) */
    --gradient-start-fallback: var(--primary);
    --gradient-end-fallback:   var(--accent);
  
    /* modern, auto-tinted stops (override when supported) */
    /* tweak the 85/15 blend to lighten/darken the gradient */
    --gradient-start: color-mix(in hsl, var(--primary) 85%, white 15%);
    --gradient-end:   color-mix(in hsl, var(--accent)  85%, white 15%);
  
    /* soft glow color derived from text */
    --gradient-glow: color-mix(in srgb, var(--text) 7%, transparent);

    --nav-h: 64px;
    --nav-border: rgba(255,255,255,0.08);
    --nav-bg: rgba(12,14,22,0.55);
  }

  /* 1) Midnight Neo */
  :root[data-theme="midnight"]{
    --fallback-a: #22d3ee; /* cyan */
    --fallback-b: #f472b6; /* pink */

    --bg: #0a0b10;
    --bg-soft: #12131b;
    --text: #e9f1ff;
    --muted: #9aa3b2;
    --primary: #20c4ff;
    --primary-strong: #08a8e6;
    --accent: #ff4d9d;

    --hue: 195;
    --grad-a: hsl(var(--hue), 90%, 55%);
    --grad-b: hsl(calc(var(--hue) + 60), 90%, 60%);

    --nav-h: 64px;
    --nav-border: rgba(255,255,255,0.10);
    --nav-bg: rgba(9,12,18,0.55);
  }

  /* 2) Paper Minimal */
  :root[data-theme="paper"]{
    --fallback-a: #2563eb; /* blue */
    --fallback-b: #7c3aed; /* violet */

    --bg: #ffffff;
    --bg-soft: #f7f8fa;
    --text: #0b1220;
    --muted: #5c667a;
    --primary: #2563eb;
    --primary-strong: #1e40af;
    --accent: #7c3aed;

    --hue: 220;
    --grad-a: hsl(var(--hue), 85%, 55%);
    --grad-b: hsl(calc(var(--hue) + 60), 85%, 55%);

    --nav-h: 64px;
    --nav-border: rgba(10,18,32,0.08);
    --nav-bg: rgba(255,255,255,0.72);
  }

  /* 3) Warm Earth */
  :root[data-theme="warm-earth"]{
    --fallback-a: #f59e0b; /* amber */
    --fallback-b: #10b981; /* emerald */

    --bg: #0f0d0a;
    --bg-soft: #16130f;
    --text: #f3eee7;
    --muted: #b8a89c;
    --primary: #f59e0b;
    --primary-strong: #b45309;
    --accent: #10b981;

    --hue: 40;
    --grad-a: hsl(var(--hue), 85%, 54%);
    --grad-b: hsl(calc(var(--hue) + 60), 70%, 45%);

    --nav-h: 64px;
    --nav-border: rgba(255,255,255,0.08);
    --nav-bg: rgba(18,15,12,0.55);
  }

  /* 4) A11y High Contrast */
  :root[data-theme="a11y-hc"]{
    --fallback-a: #00bfff; /* bright cyan */
    --fallback-b: #ffd400; /* yellow */

    --bg: #000000;
    --bg-soft: #0d0d0d;
    --text: #ffffff;
    --muted: #e5e7eb;
    --primary: #00c0ff;
    --primary-strong: #0098ff;
    --accent: #ffd400;

    --hue: 200;
    --grad-a: hsl(var(--hue), 100%, 50%);
    --grad-b: hsl(calc(var(--hue) + 60), 100%, 50%);

    --nav-h: 72px;
    --nav-border: rgba(255,255,255,0.22);
    --nav-bg: rgba(0,0,0,0.88);
  }

  /* 5) University Classic */
  :root[data-theme="university-classic"]{
    --fallback-a: #0f4cbd; /* deep blue */
    --fallback-b: #f5b800; /* gold */

    --bg: #0b1220;       /* navy */
    --bg-soft: #0e1a2b;  /* deeper navy */
    --text: #e8eefc;
    --muted: #aab8d0;
    --primary: #0f4cbd;
    --primary-strong: #0a66cc;
    --accent: #f5b800;

    --hue: 220;
    --grad-a: hsl(var(--hue), 80%, 50%);
    --grad-b: hsl(calc(var(--hue) + 60), 85%, 52%);

    --nav-h: 64px;
    --nav-border: rgba(255,255,255,0.10);
    --nav-bg: rgba(11,18,32,0.55);
  }




  * { box-sizing: border-box; }
  html, body {
    margin: 0; padding: 0;
    background: var(--bg); color: var(--text);
    font-family: "Inter", system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", Arial, "Noto Sans", "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
  }

  html { scroll-behavior: smooth; }


  a { color: inherit; text-decoration: none; }
  img { max-width: 100%; display: block; }
  
  .page { overflow-x: hidden; }
  
  /* Make anchor jumps account for fixed nav */
  section { scroll-margin-top: calc(var(--nav-h) + 16px); }
  
  /* ===============================
    Gradient background sections (brand-connected)
    =============================== */
    .gradient-bg {
      /* brand fallback (always shows) */
      background: linear-gradient(
        var(--gradient-angle),
        var(--gradient-start-fallback),
        var(--gradient-end-fallback)
      );
    
      /* modern override (auto-tinted from brand colors) */
      background: linear-gradient(
        var(--gradient-angle),
        var(--gradient-start, var(--gradient-start-fallback)),
        var(--gradient-end,   var(--gradient-end-fallback))
      );
    
      position: relative;
    }
    
    .gradient-bg::after {
      content: "";
      position: absolute; inset: 0;
      background: radial-gradient(
        1200px 600px at 20% 20%,
        var(--gradient-glow),
        transparent 60%
      );
      pointer-events: none;
    }
  
  /* ===============================
     Nav (fixed, translucent, mobile-ready)
     =============================== */
  .nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: var(--nav-h);
    z-index: 1000;
  
    /* layout */
    display: flex; align-items: center; justify-content: space-between;
    max-width: 1200px; margin: 0 auto; padding: 10px 20px;
  }
  .nav::before {
    /* full-width translucent backdrop under the centered nav */
    content: "";
    position: absolute;
    left: 50%; top: 0;
    transform: translateX(-50%);
    width: 100vw; height: 100%;
    background: linear-gradient(180deg, var(--nav-bg), rgba(12,14,22,0.35));
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--nav-border);
    z-index: -1;
  }
  
  .logo { font-weight: 800; letter-spacing: 0.3px; }
  .nav-links { display: flex; gap: 22px; list-style: none; padding: 0; margin: 0; }
  .nav a { opacity: 0.9; }
  .nav a:hover { opacity: 1; }
  
  /* Hamburger button (hidden on desktop) */
  .nav-toggle {
    display: none;
    align-items: center; justify-content: center;
    width: 40px; height: 40px;
    border-radius: 10px;
    border: 1px solid rgba(255,255,255,.15);
    background: transparent;
    cursor: pointer;
  }
  .nav-toggle .bar {
    display: block; width: 20px; height: 2px;
    background: var(--text); margin: 3px 0;
    transition: transform .2s ease, opacity .2s ease;
  }
  .nav.open .nav-toggle .bar:nth-child(1) { transform: translateY(5px) rotate(45deg); }
  .nav.open .nav-toggle .bar:nth-child(2) { opacity: 0; }
  .nav.open .nav-toggle .bar:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }
  
  /* Mobile menu */
  @media (max-width: 960px) {
    .nav { padding: 8px 14px; }
    .nav-toggle { display: inline-flex; }
  
    .nav-links {
      position: fixed;
      top: var(--nav-h);
      left: 0; right: 0;
      display: none;              /* hidden by default */
      flex-direction: column;
      gap: 12px;
      padding: 14px 18px;
      background: rgba(16,19,26,0.96);
      border-bottom: 1px solid var(--nav-border);
    }
    .nav.open .nav-links { display: flex; }
  
    /* keep the CTA compact on mobile */
    .nav .btn { padding: 8px 12px; border-radius: 10px; }
  }
  
  /* ===============================
     Hero
     =============================== */
  .hero {
    /* push content below fixed nav */
    padding: calc(80px + var(--nav-h)) 20px 120px;
  }
  .hero-content {
    max-width: 1200px; margin: 0 auto; text-align: center;
  }
  .hero h1 { font-size: clamp(2.4rem, 6vw, 4rem); margin: 10px 0 8px; }
  .hero .muted { color: var(--text); opacity: 0.8; margin: 6px auto 24px; max-width: 760px; }
  .cta-row { display: inline-flex; gap: 14px; }
  
  /* ===============================
     Buttons
     =============================== */
  .btn {
    display: inline-flex; align-items: center; justify-content: center;
    padding: 10px 18px; border-radius: 12px; border: 1px solid transparent;
    transition: transform .15s ease, box-shadow .15s ease, background .2s ease, color .2s ease;
    font-weight: 600; cursor: pointer;
  }
  .btn:hover { transform: translateY(-1px); }
  .btn:active { transform: translateY(0); }
  .btn-primary { background: var(--primary-strong); color: white; box-shadow: 0 8px 24px rgba(59,130,246,.25); }
  .btn-ghost { background: transparent; border-color: rgba(255,255,255,.12); color: var(--text); }
  .btn-invert { background: white; color: #111827; }
  .btn-ghost-invert { background: transparent; border: 1px solid rgba(255,255,255,.5); color: white; }
  
  /* ===============================
     Sections
     =============================== */
  .section { max-width: 1200px; margin: 0 auto; padding: 80px 20px; }
  
  /* Subtle tinted background so the site never looks grayscale */
  .section-light {
    background: linear-gradient(180deg, rgba(59,130,246,0.08), rgba(139,92,246,0.06));
    border-top: 1px solid rgba(255,255,255,0.05);
    border-bottom: 1px solid rgba(255,255,255,0.05);
  }
  
  .section-heading { text-align: center; margin-bottom: 36px; }
  .section-heading h2 { font-size: clamp(1.8rem, 4vw, 2.4rem); margin: 0 0 10px; }
  .section-heading p { margin: 0; color: var(--muted); }
  
  /* ===============================
     Grid utilities
     =============================== */
  .grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
  .grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
  
  @media (max-width: 960px) {
    .grid-2, .grid-3 { grid-template-columns: 1fr; }
  }
  
  /* ===============================
     Cards / panels
     =============================== */
  .card, .panel {
    background: var(--bg-soft);
    border: 1px solid rgba(255,255,255,0.06);
    border-radius: 16px;
    padding: 18px;
    box-shadow: 0 8px 30px rgba(0,0,0,.25);
  }
  .card.lift:hover { transform: translateY(-3px); transition: transform .2s ease; }
  
  .feature-card .icon { font-size: 28px; margin-bottom: 8px; }
  
  /* ===============================
     Stats
     =============================== */
  .stat {
    display: flex; flex-direction: column; align-items: center;
    padding: 22px; border-radius: 16px;
    background: linear-gradient(180deg, rgba(255,255,255,0.05), rgba(255,255,255,0.02));
    border: 1px solid rgba(255,255,255,0.06);
  }
  .stat .number { font-size: 2rem; font-weight: 800; }
  .stat .label { color: var(--muted); margin-top: 6px; }
  
  /* ===============================
     Pricing
     =============================== */
  .pricing .price-tag { font-size: 2rem; font-weight: 800; margin: 8px 0 12px; }
  .price.highlight {
    outline: 2px solid rgba(106,160,255,.5);
    background: linear-gradient(180deg, rgba(106,160,255,.12), rgba(139,92,246,.10));
  }
  
  /* ===============================
     Footer
     =============================== */
  .footer {
    opacity: .9; max-width: 1200px; margin: 0 auto; padding: 40px 20px 80px;
    display: flex; flex-wrap: wrap; gap: 16px; align-items: center; justify-content: space-between;
  }
  .footer-links { list-style: none; display: flex; gap: 16px; padding: 0; margin: 0; }
  .muted { color: var(--muted); }
  
  /* ===============================
     Checklists
     =============================== */
  .checklist { margin: 12px 0 0; padding-left: 18px; }
  .checklist li { margin: 6px 0; }
  
  /* ===============================
     Reveal & expand animations
     =============================== */
  .reveal { opacity: 1; transform: none; }
  
  .js .reveal {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity .6s ease, transform .6s ease;
  }
  .js .reveal.visible {
    opacity: 1;
    transform: translateY(0);
  }
  
  .expand-on-visible { transform: none; }
  .js .expand-on-visible { transform: scale(.98); transition: transform .6s cubic-bezier(.2,.8,.2,1); }
  .js .expand-on-visible.visible { transform: scale(1); }
  
  /* Subtle section separators in light areas */
  .section-light .card, .section-light .panel { border-color: rgba(255,255,255,0.08); }
  
  /* ===============================
    Simple "routing": show home by default
    =============================== */
    .route { display: none; }
    #route-home { display: block; } /* default view when no hash */
    
    /* ===============================
        Blog dashboard & post styles
        =============================== */
    .blog-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }
    @media (max-width: 960px) {
      .blog-grid { grid-template-columns: 1fr; }
    }
    .blog-card .card-title { margin: 4px 0 8px; }
    .blog-card .card-meta { color: var(--muted); font-size: 0.95rem; margin-top: 8px; }
    
    .post-title { font-size: clamp(1.8rem, 4vw, 2.6rem); margin: 6px 0 10px; }
    .post-meta { color: var(--muted); display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-bottom: 16px; }
    .tag {
      display: inline-block; padding: 2px 10px; border-radius: 999px;
      border: 1px solid rgba(255,255,255,0.15);
      background: rgba(255,255,255,0.06);
      font-size: 0.85rem; color: var(--text);
    }
    .post-body p { line-height: 1.75; margin: 14px 0; }

    .modal {
      position: fixed;
      top: 0; left: 0;
      width: 100%; height: 100%;
      background: rgba(0,0,0,0.6);
      display: flex;
      align-items: center;
      justify-content: center;
      z-index: 1000;
    }

    .modal.hidden { display: none; }

    .modal-content {
      background: var(--surface, #fff);
      padding: 2rem;
      border-radius: 12px;
      max-width: 500px;
      width: 90%;
      box-shadow: 0 8px 20px rgba(0,0,0,0.25);
    }

    .modal-content input,
    .modal-content textarea {
      width: 100%;
      padding: 0.75rem;
      margin: 0.5rem 0;
      border: 1px solid #ddd;
      border-radius: 8px;
    }

    .modal-content .close {
      float: right;
      cursor: pointer;
      font-size: 1.5rem;
    }

 /* Fullscreen overlay */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(6px);
  display: flex;
  align-items: center;   /* vertical center */
  justify-content: center; /* horizontal center */
  z-index: 1000;
  padding: 1rem;
}

/* Centered form container */
.modal-content {
  background: var(--card-bg, #fff);
  color: var(--text-color, #222);
  border-radius: 1rem;
  padding: 2rem;
  width: 100%;
  max-width: 650px;   /* wider form */
  min-height: 300px;
  box-shadow: 0 15px 40px rgba(0,0,0,0.25);
  position: relative;
  animation: fadeInUp 0.25s ease;
}

/* Close button */
.close-btn {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: none;
  border: none;
  font-size: 1.8rem;
  font-weight: bold;
  color: inherit;
  cursor: pointer;
}

/* Form styling */
.form-body {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
  margin-top: 1rem;
}

.form-body input,
.form-body textarea {
  padding: 0.9rem 1rem;
  border: 1px solid var(--border-color, #ccc);
  border-radius: 0.6rem;
  font-size: 1rem;
  width: 100%;
  background: var(--input-bg, #fafafa);
}

.form-body .btn {
  margin-top: 1rem;
  border-radius: 0.6rem;
  padding: 0.9rem 1.2rem;
  font-weight: 600;
  width: fit-content;
}

.card.price {
  display: flex;
  flex-direction: column;
  justify-content: space-between; /* spreads content */
}

.card.price .btn {
  margin-top: auto; /* pushes the button down */
}

.footer {
  display: grid;
  grid-template-columns: 1fr auto 1fr; /* left | center | right */
  align-items: center;
  padding: 1rem 2rem;
}

.footer .logo {
  justify-self: start;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 2rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer .muted {
  justify-self: end;
}

.button-group {
  display: flex;
  gap: 1rem;   /* adjust spacing between buttons */
}