:root {
        --bg: hsl(0 0% 96.1%);
        --primary: hsl(190 100% 42.5%);
        --highlight: hsl(0 0% 100%);
        --text: hsl(0 0% 0%);
        --onhover: hsl(0 0% 80.4%);
        --popupbg: hsla(0, 0%, 0%, 0.33);
        --alternate: hsl(48.54, 83.18%, 79.02%);
        --tableHeader: #e8e6e4;
        --inputHighlight: hsla(190, 100%, 42.5%, 0.5);
        --alert: hsla(0 100% 50% / 0.6);

        --text-secondary: hsla(0, 0%, 0%, 0.6);
        --border: hsl(0 0% 87%);
        --radius: 10px;
      }

      body[data-theme="dark"] {
        --bg: hsl(0 0% 12.5%);
        --primary: hsl(190 100% 27.6%);
        --highlight: hsl(0 0% 20.8%);
        --text: hsla(0, 0%, 100%, 0.795);
        --onhover: hsl(0 0% 32.9%);
        --popupbg: hsla(0, 0%, 0%, 0.33);
        --alternate: hsl(48.54, 83.18%, 29.02%);
        --tableHeader: hsl(0 0% 30.8%);
        --inputHighlight: hsla(190, 100%, 27.6%, 0.5);
        --alert: hsla(0 100% 50% / 0.6);

        --text-secondary: hsla(0, 0%, 100%, 0.55);
        --border: hsl(0 0% 28%);
      }

      * {
        box-sizing: border-box;
      }

      html {
        scroll-behavior: smooth;
      }

      body {
        margin: 0;
        background: var(--bg);
        color: var(--text);
        font-family: "Inter", sans-serif;
        transition:
          background 0.3s ease,
          color 0.3s ease;
        -webkit-font-smoothing: antialiased;
      }

      .display {
        font-family: "Space Grotesk", sans-serif;
      }

      .mono {
        font-family: "JetBrains Mono", monospace;
      }

      a {
        color: var(--primary);
        text-decoration: none;
      }

      .container {
        max-width: 1080px;
        margin: 0 auto;
        padding: 0 24px;
      }

      /* ============ NAV ============ */
      header {
        position: sticky;
        top: 0;
        z-index: 100;
        background: var(--bg);
        border-bottom: 1px solid var(--border);
        backdrop-filter: blur(6px);
      }

      nav {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 14px 24px;
        max-width: 1080px;
        margin: 0 auto;
      }

      .logo-img {
        height: 32px;
        display: block;
      }

      .logo-light {
        display: block;
      }
      .logo-dark {
        display: none;
      }
      body[data-theme="dark"] .logo-light {
        display: none;
      }
      body[data-theme="dark"] .logo-dark {
        display: block;
      }

      .nav-links {
        display: flex;
        align-items: center;
        gap: 28px;
      }

      .nav-links a {
        color: var(--text);
        font-size: 0.95rem;
        font-weight: 500;
        opacity: 0.75;
        transition: opacity 0.2s;
      }
      .nav-links a:hover {
        opacity: 1;
      }

      .theme-toggle {
        background: var(--highlight);
        border: 1px solid var(--border);
        border-radius: 999px;
        width: 38px;
        height: 38px;
        display: flex;
        align-items: center;
        justify-content: center;
        cursor: pointer;
        color: var(--text);
        transition:
          background 0.2s,
          border-color 0.2s;
        flex-shrink: 0;
      }
      .theme-toggle:hover {
        background: var(--onhover);
      }
      .theme-toggle svg {
        width: 18px;
        height: 18px;
      }
      .theme-toggle .sun {
        display: none;
      }
      body[data-theme="dark"] .theme-toggle .sun {
        display: block;
      }
      body[data-theme="dark"] .theme-toggle .moon {
        display: none;
      }

      .nav-right {
        display: flex;
        align-items: center;
        gap: 18px;
      }

      /* ============ HERO ============ */
      .hero {
        position: relative;
        padding: 90px 0 70px;
        overflow: hidden;
      }

      .hero-streak {
        position: absolute;
        top: -100px;
        right: -70px;
        width: 900px;
        height: 900px;
        opacity: 0.3;
        pointer-events: none;
        z-index: 0;
      }
      body[data-theme="dark"] .hero-streak {
        opacity: 0.18;
      }

      .hero-content {
        position: relative;
        z-index: 1;
        max-width: 680px;
      }

      .eyebrow {
        font-family: "JetBrains Mono", monospace;
        font-size: 0.8rem;
        letter-spacing: 0.12em;
        text-transform: uppercase;
        color: var(--primary);
        font-weight: 600;
        margin-bottom: 18px;
        display: inline-flex;
        align-items: center;
        gap: 8px;
      }

      .eyebrow::before {
        content: "";
        width: 8px;
        height: 8px;
        border-radius: 50%;
        background: var(--primary);
        display: inline-block;
      }

      h1 {
        font-family: "Space Grotesk", sans-serif;
        font-size: clamp(2.4rem, 6vw, 3.6rem);
        font-weight: 700;
        line-height: 1.1;
        letter-spacing: -0.02em;
        margin: 0 0 20px;
      }

      h1 .accent {
        color: var(--primary);
      }

      .hero p.lead {
        font-size: 1.15rem;
        line-height: 1.65;
        color: var(--text-secondary);
        max-width: 540px;
        margin: 0 0 32px;
      }

      .cta-row {
        display: flex;
        gap: 14px;
        flex-wrap: wrap;
        margin-bottom: 56px;
      }

      .btn {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 13px 24px;
        border-radius: var(--radius);
        font-weight: 600;
        font-size: 0.95rem;
        border: 1px solid transparent;
        cursor: pointer;
        transition:
          transform 0.15s ease,
          background 0.2s ease,
          border-color 0.2s ease;
        font-family: "Inter", sans-serif;
      }
      .btn:active {
        transform: scale(0.98);
      }

      .btn-primary {
        background: var(--primary);
        color: #fff;
      }
      .btn-primary:hover {
        filter: brightness(1.08);
      }

      .btn-secondary {
        background: var(--highlight);
        color: var(--text);
        border-color: var(--border);
      }
      .btn-secondary:hover {
        background: var(--onhover);
      }

      /* ============ FLIGHT STRIP ============ */
      .strip {
        background: var(--highlight);
        border: 1px solid var(--border);
        border-radius: var(--radius);
        overflow: hidden;
        box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
      }

      .strip-header {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 10px 18px;
        background: var(--tableHeader);
        font-family: "JetBrains Mono", monospace;
        font-size: 0.75rem;
        letter-spacing: 0.08em;
        text-transform: uppercase;
        color: var(--text-secondary);
        font-weight: 600;
      }

      .strip-header .dot-row {
        display: flex;
        gap: 6px;
      }
      .strip-header .dot-row span {
        width: 9px;
        height: 9px;
        border-radius: 50%;
        background: var(--border);
        display: inline-block;
      }

      .strip-row {
        display: grid;
        grid-template-columns: repeat(5, 1fr);
        border-bottom: 1px solid var(--border);
      }
      .strip-row:last-child {
        border-bottom: none;
      }

      .strip-cell {
        padding: 16px 18px;
        border-right: 1px solid var(--border);
      }
      .strip-cell:last-child {
        border-right: none;
      }

      .strip-cell .label {
        font-family: "JetBrains Mono", monospace;
        font-size: 0.68rem;
        letter-spacing: 0.1em;
        text-transform: uppercase;
        color: var(--text-secondary);
        margin-bottom: 6px;
        display: block;
      }

      .strip-cell .value {
        font-family: "JetBrains Mono", monospace;
        font-size: 1.05rem;
        font-weight: 600;
      }

      .strip-cell .value.accent {
        color: var(--primary);
      }
      .strip-cell .value.warn {
        color: hsl(30, 80%, 50%);
      }
      body[data-theme="dark"] .strip-cell .value.warn {
        color: hsl(40, 90%, 65%);
      }

      .strip-note {
        padding: 14px 18px;
        background: var(--alternate);
        font-size: 0.85rem;
        color: var(--text);
        display: flex;
        align-items: center;
        gap: 10px;
      }
      .strip-note svg {
        flex-shrink: 0;
        width: 16px;
        height: 16px;
      }

      @media (max-width: 720px) {
        .strip-row {
          grid-template-columns: repeat(2, 1fr);
        }
        .strip-cell:nth-child(2n) {
          border-right: none;
        }
        .strip-cell:nth-child(-n + 4) {
          border-bottom: 1px solid var(--border);
        }
      }

      /* ============ SECTIONS ============ */
      section {
        padding: 80px 0;
      }

      section.alt {
        background: var(--highlight);
        border-top: 1px solid var(--border);
        border-bottom: 1px solid var(--border);
      }

      .section-head {
        max-width: 600px;
        margin: 0 0 48px;
      }

      .section-head .eyebrow {
        margin-bottom: 14px;
      }

      h2 {
        font-family: "Space Grotesk", sans-serif;
        font-size: clamp(1.7rem, 4vw, 2.4rem);
        font-weight: 700;
        letter-spacing: -0.01em;
        margin: 0 0 14px;
      }

      .section-head p {
        color: var(--text-secondary);
        line-height: 1.65;
        font-size: 1.05rem;
        margin: 0;
      }

      /* ============ GAP / PROBLEM ============ */
      .gap-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 40px;
        align-items: start;
      }

      .gap-grid p {
        line-height: 1.7;
        color: var(--text-secondary);
        font-size: 1rem;
      }

      .gap-grid .highlight-line {
        font-family: "Space Grotesk", sans-serif;
        font-weight: 600;
        color: var(--text);
        font-size: 1.15rem;
        margin-top: 18px;
      }

      @media (max-width: 760px) {
        .gap-grid {
          grid-template-columns: 1fr;
          gap: 24px;
        }
      }

      /* ============ FEATURES ============ */
      .features {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 20px;
      }

      @media (max-width: 900px) {
        .features {
          grid-template-columns: 1fr;
        }
      }

      .feature-card {
        background: var(--highlight);
        border: 1px solid var(--border);
        border-radius: var(--radius);
        padding: 28px;
        position: relative;
        display: flex;
        flex-direction: column;
        gap: 14px;
      }

      .feature-icon {
        width: 44px;
        height: 44px;
        border-radius: 10px;
        background: var(--inputHighlight);
        display: flex;
        align-items: center;
        justify-content: center;
        color: var(--primary);
      }
      .feature-icon svg {
        width: 22px;
        height: 22px;
      }

      .feature-card h3 {
        font-family: "Space Grotesk", sans-serif;
        font-size: 1.15rem;
        font-weight: 600;
        margin: 0;
      }

      .feature-card p {
        color: var(--text-secondary);
        font-size: 0.95rem;
        line-height: 1.6;
        margin: 0;
      }

      .badge {
        position: absolute;
        top: 24px;
        right: 24px;
        background: var(--alternate);
        color: var(--text);
        font-family: "JetBrains Mono", monospace;
        font-size: 0.65rem;
        font-weight: 600;
        letter-spacing: 0.08em;
        text-transform: uppercase;
        padding: 4px 9px;
        border-radius: 999px;
      }
      body[data-theme="dark"] .badge {
        color: hsl(0 0% 100% / 0.85);
      }

      /* ============ OPEN SOURCE ============ */
      .oss {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 40px;
        flex-wrap: wrap;
      }

      .oss-text {
        max-width: 540px;
      }

      .oss-text h2 {
        margin-bottom: 12px;
      }
      .oss-text p {
        color: var(--text-secondary);
        line-height: 1.65;
        font-size: 1.05rem;
        margin: 0;
      }

      .oss-code {
        background: var(--text);
        color: var(--bg);
        border-radius: var(--radius);
        padding: 20px 24px;
        font-family: "JetBrains Mono", monospace;
        font-size: 0.85rem;
        line-height: 1.8;
        min-width: 280px;
        flex: 1;
      }
      body[data-theme="dark"] .oss-code {
        background: hsl(0 0% 8%);
        color: hsl(0 0% 85%);
      }

      .oss-code .c1 {
        color: hsl(190 100% 60%);
      }
      .oss-code .c2 {
        color: hsl(48 80% 65%);
      }

      /* ============ DOCUMENT / DOWNLOAD ============ */
      .document-showcase {
        display: grid;
        grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr);
        gap: 40px;
        align-items: center;
      }

      .document-copy {
        max-width: 620px;
      }

      .document-copy p {
        color: var(--text-secondary);
        line-height: 1.7;
        font-size: 1.02rem;
        margin: 0 0 18px;
      }

      .document-copy p strong {
        color: var(--text);
      }

      .document-note {
        font-family: "JetBrains Mono", monospace;
        font-size: 0.82rem !important;
        letter-spacing: 0.02em;
        color: var(--primary) !important;
      }

      .document-actions {
        margin-bottom: 0;
      }

      .document-preview {
        display: flex;
        justify-content: center;
      }

      .document-preview-frame {
        position: relative;
        width: min(100%, 410px);
        padding: 18px;
        border-radius: 28px;
        background:
          linear-gradient(135deg, var(--inputHighlight), transparent 50%),
          var(--highlight);
        border: 1px solid var(--border);
        box-shadow: 0 28px 70px rgba(0, 0, 0, 0.08);
      }

      .document-preview-spine {
        position: absolute;
        inset: 18px auto 18px 18px;
        width: 16px;
        border-radius: 18px 0 0 18px;
        background: linear-gradient(180deg, var(--primary), var(--inputHighlight));
        opacity: 0.95;
      }

      .document-preview-sheet {
        position: relative;
        margin-left: 22px;
        background:
          radial-gradient(circle at top right, var(--inputHighlight), transparent 28%),
          linear-gradient(180deg, var(--highlight), var(--bg));
        border: 1px solid var(--border);
        min-height: 500px;
        overflow: hidden;
        display: flex;
        flex-direction: column;
        justify-content: space-between;
      }

      .document-preview-topline,
      .document-preview-footer {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 14px;
        font-family: "JetBrains Mono", monospace;
        font-size: 0.72rem;
        letter-spacing: 0.08em;
        text-transform: uppercase;
        color: var(--text-secondary);
      }

      .document-preview-cover {
        display: flex;
        flex-direction: column;
        gap: 18px;
        padding: 34px 0;
      }

      .document-preview-kicker {
        display: inline-flex;
        width: fit-content;
        padding: 6px 10px;
        border-radius: 999px;
        background: var(--inputHighlight);
        color: var(--primary);
        font-family: "JetBrains Mono", monospace;
        font-size: 0.7rem;
        font-weight: 700;
        letter-spacing: 0.08em;
        text-transform: uppercase;
      }

      .document-preview-cover h3 {
        font-family: "Space Grotesk", sans-serif;
        font-size: clamp(2rem, 6vw, 3.2rem);
        line-height: 0.95;
        letter-spacing: -0.05em;
        margin: 0;
      }

      .document-preview-cover p {
        margin: 0;
        color: var(--text-secondary);
        line-height: 1.65;
        max-width: 28ch;
        font-size: 0.96rem;
      }

      @media (max-width: 900px) {
        .document-showcase {
          grid-template-columns: 1fr;
        }

        .document-preview-frame {
          width: 100%;
          max-width: 460px;
        }
      }

      @media (max-width: 560px) {
        .document-preview-sheet {
          min-height: 420px;
          padding: 22px;
        }

        .document-preview-spine {
          inset: 16px auto 16px 16px;
        }

        .document-preview-cover h3 {
          font-size: 2.35rem;
        }
      }

      /* ============ FOLLOW ALONG ============ */
      .follow-along-box {
        background: var(--highlight);
        border: 1px solid var(--border);
        border-radius: var(--radius);
        padding: 48px;
        text-align: center;
        max-width: 600px;
        margin: 0 auto;
      }

      .follow-along-box h2 {
        margin-bottom: 10px;
      }
      .follow-along-box p {
        color: var(--text-secondary);
        margin: 0 0 28px;
        font-size: 1rem;
      }

      /* ============ FOOTER ============ */
      footer {
        border-top: 1px solid var(--border);
        padding: 40px 0;
      }

      .footer-grid {
        display: flex;
        justify-content: space-between;
        align-items: flex-start;
        flex-wrap: wrap;
        gap: 24px;
      }

      .footer-divider {
        width: 1px;
        background: var(--border);
        align-self: stretch;
      }

      .footer-brand {
        display: flex;
        align-items: center;
        gap: 10px;
      }
      .footer-brand img {
        height: 26px;
      }

      .footer-links {
        display: flex;
        gap: 24px;
      }
      .footer-links a {
        color: var(--text-secondary);
        font-size: 0.9rem;
      }
      .footer-links a:hover {
        color: var(--text);
      }

      .disclaimer {
        margin-top: 28px;
        padding-top: 24px;
        border-top: 1px solid var(--border);
        font-size: 0.82rem;
        color: var(--text-secondary);
        line-height: 1.6;
        max-width: 720px;
      }

      .disclaimer strong {
        color: var(--text);
      }

      @media (max-width: 900px) {
        .footer-divider {
          display: none;
        }
      }

      /* Focus visibility */
      a:focus-visible,
      button:focus-visible,
      input:focus-visible {
        outline: 2px solid var(--primary);
        outline-offset: 2px;
      }

      @media (prefers-reduced-motion: reduce) {
        * {
          transition: none !important;
          scroll-behavior: auto !important;
        }
      }


.logo {
  font-family: 'Manrope', sans-serif;
}

#logoAI{
    color: var(--primary);
}

#logoVFR {
    position: relative;
    right: 3px;
    color: var(--text);
}

#logoAI, #logoVFR {
    font-size: 30px;
    font-weight: 700;
}

.copyright {
    font-size: 14px;
    color: var(--text-secondary);
    margin-top: 10px;
}

#YSP {
  background: hsl(0 0% 100%);
  border-radius: 10px;
  border: 1px solid var(--onhover);
  padding: 10px;
}

#creator-info {
  max-width: 100px;
  font-size: 1rem;
  line-height: 1.65;
  max-width: 540px;
  margin: 0 0 32px;
  text-align: left;
}