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

    :root {
      --bg:          #F8F7FF;
      --card:        #ffffff;
      --primary:     #6C63FF;
      --primary-h:   #5A52E0;
      --accent:      #FF6B35;
      --text:        #1a1a2e;
      --text-muted:  #6B7280;
      --border:      #E5E7EB;
      --success:     #10B981;
      --radius:      16px;
      --shadow:      0 4px 24px rgba(0,0,0,0.08);
    }

    body {
      font-family: 'Plus Jakarta Sans', system-ui, sans-serif;
      background: var(--bg);
      color: var(--text);
      min-height: 100vh;
      -webkit-font-smoothing: antialiased;
    }

    /* ── Nav ──────────────────────────────────────────────────────── */
    .cfi-nav {
      background: rgba(255,255,255,0.92);
      backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--border);
      padding: 0 clamp(24px,5vw,64px);
      height: 60px;
      display: flex;
      align-items: center;
      position: sticky;
      top: 0;
      z-index: 100;
    }
    .cfi-nav-inner {
      max-width: 1200px;
      width: 100%;
      margin: 0 auto;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .cfi-logo {
      font-size: 1.15rem;
      font-weight: 800;
      color: var(--text);
      text-decoration: none;
      letter-spacing: -0.02em;
    }
    .cfi-logo span { color: var(--primary); }
    .cfi-nav-links { display: flex; gap: 20px; align-items: center; }
    .cfi-nav-links a {
      font-size: 0.875rem;
      font-weight: 500;
      color: var(--text-muted);
      text-decoration: none;
    }
    .cfi-nav-links a:hover { color: var(--text); }
    .cfi-nav-cta {
      background: var(--primary);
      color: #fff;
      font-size: 0.875rem;
      font-weight: 600;
      padding: 8px 18px;
      border-radius: 8px;
      text-decoration: none;
    }
    .cfi-nav-cta:hover { background: var(--primary-h); color: #fff; }

    /* ── Hero ──────────────────────────────────────────────────────── */
    .cfi-hero {
      text-align: center;
      padding: 64px clamp(24px,5vw,64px) 48px;
      max-width: 760px;
      margin: 0 auto;
    }
    .cfi-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: rgba(108,99,255,0.1);
      color: var(--primary);
      font-size: 0.8rem;
      font-weight: 600;
      padding: 6px 14px;
      border-radius: 999px;
      margin-bottom: 20px;
    }
    .cfi-hero h1 {
      font-size: clamp(2rem,5vw,3rem);
      font-weight: 800;
      line-height: 1.15;
      letter-spacing: -0.03em;
      margin-bottom: 16px;
    }
    .cfi-hero h1 span { color: var(--primary); }
    .cfi-hero p {
      font-size: 1.1rem;
      color: var(--text-muted);
      line-height: 1.65;
      max-width: 520px;
      margin: 0 auto;
    }

    /* ── Upload Zone ──────────────────────────────────────────────── */
    .cfi-tool {
      max-width: 760px;
      margin: 0 auto 48px;
      padding: 0 clamp(24px,5vw,32px);
    }

    .cfi-upload-zone {
      background: var(--card);
      border: 2px dashed var(--border);
      border-radius: var(--radius);
      padding: 48px 32px;
      text-align: center;
      cursor: pointer;
      transition: border-color 0.2s, background 0.2s;
      position: relative;
      overflow: hidden;
    }
    .cfi-upload-zone:hover,
    .cfi-upload-zone.drag-over {
      border-color: var(--primary);
      background: rgba(108,99,255,0.04);
    }
    .cfi-upload-icon {
      font-size: 2.5rem;
      margin-bottom: 12px;
      display: block;
    }
    .cfi-upload-title {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 6px;
    }
    .cfi-upload-sub {
      font-size: 0.875rem;
      color: var(--text-muted);
      margin-bottom: 20px;
    }
    .cfi-upload-btn {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: var(--primary);
      color: #fff;
      font-family: inherit;
      font-size: 0.9rem;
      font-weight: 600;
      padding: 12px 24px;
      border-radius: 10px;
      border: none;
      cursor: pointer;
      transition: background 0.15s;
    }
    .cfi-upload-btn:hover { background: var(--primary-h); }

    #cfi-file-input { display: none; }

    /* ── Preview section ──────────────────────────────────────────── */
    .cfi-preview-section {
      display: none;
      margin-top: 24px;
    }
    .cfi-preview-inner {
      background: var(--card);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 24px;
      box-shadow: var(--shadow);
    }
    .cfi-preview-row {
      display: flex;
      align-items: flex-start;
      gap: 24px;
      flex-wrap: wrap;
    }
    .cfi-preview-img-wrap {
      flex-shrink: 0;
      position: relative;
    }
    #cfi-preview-canvas {
      width: 200px;
      height: 150px;
      object-fit: cover;
      border-radius: 10px;
      display: block;
    }
    .cfi-preview-right { flex: 1; min-width: 220px; }
    .cfi-preview-label {
      font-size: 0.75rem;
      font-weight: 600;
      color: var(--text-muted);
      text-transform: uppercase;
      letter-spacing: 0.05em;
      margin-bottom: 10px;
    }
    .cfi-sample-row {
      display: flex;
      gap: 8px;
      flex-wrap: wrap;
      margin-bottom: 16px;
    }
    .cfi-swatch {
      width: 36px;
      height: 36px;
      border-radius: 8px;
      border: 1px solid rgba(0,0,0,0.08);
      cursor: pointer;
      transition: transform 0.1s;
      position: relative;
    }
    .cfi-swatch:hover { transform: scale(1.1); }
    .cfi-swatch .hex-tip {
      position: absolute;
      bottom: 100%;
      left: 50%;
      transform: translateX(-50%) translateY(-4px);
      background: #1a1a2e;
      color: #fff;
      font-size: 0.7rem;
      font-weight: 600;
      padding: 3px 7px;
      border-radius: 5px;
      white-space: nowrap;
      pointer-events: none;
      opacity: 0;
      transition: opacity 0.15s;
    }
    .cfi-swatch:hover .hex-tip { opacity: 1; }

    .cfi-extract-btn {
      width: 100%;
      padding: 14px;
      background: var(--primary);
      color: #fff;
      font-family: inherit;
      font-size: 0.95rem;
      font-weight: 700;
      border: none;
      border-radius: 10px;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      transition: background 0.15s;
    }
    .cfi-extract-btn:hover { background: var(--primary-h); }
    .cfi-extract-btn:disabled { opacity: 0.6; cursor: not-allowed; }

    .cfi-spinner {
      width: 18px;
      height: 18px;
      border: 2px solid rgba(255,255,255,0.3);
      border-top-color: #fff;
      border-radius: 50%;
      animation: spin 0.7s linear infinite;
      display: none;
    }
    @keyframes spin { to { transform: rotate(360deg); } }

    /* ── Results ────────────────────────────────────────────────── */
    .cfi-results {
      display: none;
      margin-top: 32px;
    }
    .cfi-results-inner {
      background: var(--card);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 28px;
      box-shadow: var(--shadow);
    }
    .cfi-results-header {
      margin-bottom: 20px;
    }
    .cfi-results-name {
      font-size: 1.2rem;
      font-weight: 800;
      letter-spacing: -0.02em;
      margin-bottom: 4px;
    }
    .cfi-results-sub {
      font-size: 0.875rem;
      color: var(--text-muted);
    }

    /* Palette swatches row */
    .cfi-palette-row {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 10px;
      margin-bottom: 24px;
    }
    .cfi-palette-swatch {
      aspect-ratio: 1;
      border-radius: 12px;
      position: relative;
      cursor: pointer;
      transition: transform 0.15s, box-shadow 0.15s;
      border: 1px solid rgba(0,0,0,0.06);
    }
    .cfi-palette-swatch:hover {
      transform: translateY(-3px);
      box-shadow: 0 8px 24px rgba(0,0,0,0.12);
    }
    .cfi-swatch-label {
      position: absolute;
      bottom: 0;
      left: 0;
      right: 0;
      background: rgba(0,0,0,0.55);
      color: #fff;
      font-size: 0.65rem;
      font-weight: 600;
      text-align: center;
      padding: 5px 4px 4px;
      border-radius: 0 0 11px 11px;
      text-transform: uppercase;
      letter-spacing: 0.04em;
    }
    .cfi-swatch-hex {
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      background: rgba(255,255,255,0.9);
      color: #1a1a2e;
      font-size: 0.72rem;
      font-weight: 700;
      padding: 4px 8px;
      border-radius: 6px;
      opacity: 0;
      transition: opacity 0.15s;
      white-space: nowrap;
    }
    .cfi-palette-swatch:hover .cfi-swatch-hex { opacity: 1; }

    /* Hex codes list */
    .cfi-hex-grid {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-bottom: 24px;
    }
    .cfi-hex-item {
      display: flex;
      align-items: center;
      gap: 8px;
      background: var(--bg);
      border: 1px solid var(--border);
      border-radius: 8px;
      padding: 8px 12px;
      cursor: pointer;
      font-size: 0.875rem;
      font-weight: 600;
      color: var(--text);
      transition: border-color 0.15s;
    }
    .cfi-hex-item:hover { border-color: var(--primary); }
    .cfi-hex-dot {
      width: 16px;
      height: 16px;
      border-radius: 4px;
      flex-shrink: 0;
      border: 1px solid rgba(0,0,0,0.08);
    }
    .cfi-hex-role {
      font-size: 0.7rem;
      font-weight: 500;
      color: var(--text-muted);
      margin-left: 2px;
    }
    .cfi-copy-hint {
      font-size: 0.72rem;
      color: var(--text-muted);
      margin-bottom: 16px;
    }

    /* Kit CTA */
    .cfi-kit-cta {
      background: linear-gradient(135deg, #1a1a2e 0%, #0d0d1a 100%);
      border: 1.5px solid rgba(108,99,255,0.3);
      border-radius: 14px;
      padding: 20px 24px;
      display: flex;
      align-items: center;
      gap: 20px;
      flex-wrap: wrap;
    }
    .cfi-kit-cta-body { flex: 1; min-width: 200px; }
    .cfi-kit-cta-title {
      font-size: 1rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 4px;
    }
    .cfi-kit-cta-sub {
      font-size: 0.8rem;
      color: rgba(255,255,255,0.6);
    }
    .cfi-kit-cta-btn {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: var(--accent);
      color: #fff;
      font-family: inherit;
      font-size: 0.875rem;
      font-weight: 700;
      padding: 12px 22px;
      border-radius: 10px;
      text-decoration: none;
      white-space: nowrap;
      transition: background 0.15s;
    }
    .cfi-kit-cta-btn:hover { background: #e85a26; color: #fff; }

    .cfi-reset-btn {
      background: transparent;
      border: 1px solid var(--border);
      color: var(--text-muted);
      font-family: inherit;
      font-size: 0.8rem;
      padding: 8px 16px;
      border-radius: 8px;
      cursor: pointer;
      margin-top: 16px;
    }
    .cfi-reset-btn:hover { border-color: var(--text-muted); color: var(--text); }

    /* ── Error ──────────────────────────────────────────────────── */
    .cfi-error {
      background: #FEF2F2;
      color: #B91C1C;
      border: 1px solid #FECACA;
      border-radius: 10px;
      padding: 12px 16px;
      font-size: 0.875rem;
      margin-top: 16px;
      display: none;
    }

    /* ── SEO Copy ───────────────────────────────────────────────── */
    .cfi-seo {
      max-width: 760px;
      margin: 48px auto 48px;
      padding: 0 clamp(24px,5vw,32px);
      font-family: 'DM Sans', system-ui, sans-serif;
    }
    .cfi-seo h2 {
      font-family: 'Plus Jakarta Sans', system-ui, sans-serif;
      font-size: 1.3rem;
      font-weight: 800;
      letter-spacing: -0.02em;
      margin: 32px 0 12px;
    }
    .cfi-seo h2:first-child { margin-top: 0; }
    .cfi-seo p {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 14px;
    }
    .cfi-seo ul {
      padding-left: 20px;
      margin-bottom: 14px;
    }
    .cfi-seo ul li {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 6px;
    }
    .cfi-seo strong { color: var(--text); }

    /* ── More Free Tools ────────────────────────────────────────── */
    .cfi-tools-grid {
      max-width: 760px;
      margin: 0 auto 56px;
      padding: 0 clamp(24px,5vw,32px);
    }
    .cfi-tools-grid h2 {
      font-family: 'Plus Jakarta Sans', system-ui, sans-serif;
      font-size: 1rem;
      font-weight: 700;
      margin-bottom: 16px;
    }
    .cfi-tools-row {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
      gap: 12px;
    }
    .cfi-tool-card {
      display: block;
      background: var(--card);
      border: 1px solid var(--border);
      border-radius: 12px;
      padding: 16px;
      text-decoration: none;
      transition: box-shadow 0.2s, border-color 0.2s;
    }
    .cfi-tool-card:hover {
      box-shadow: 0 4px 16px rgba(0,0,0,0.08);
      border-color: rgba(108,99,255,0.3);
    }
    .cfi-tool-icon { font-size: 1.4rem; margin-bottom: 8px; }
    .cfi-tool-name {
      font-family: 'Plus Jakarta Sans', system-ui, sans-serif;
      font-weight: 700;
      font-size: 0.9rem;
      color: var(--text);
      margin-bottom: 4px;
    }
    .cfi-tool-desc {
      font-family: 'DM Sans', system-ui, sans-serif;
      font-size: 0.78rem;
      color: var(--text-muted);
    }

    /* ── Footer ──────────────────────────────────────────────────── */
    .cfi-footer {
      background: var(--text);
      color: rgba(255,255,255,0.55);
      padding: 40px clamp(24px,5vw,64px);
      text-align: center;
    }
    .cfi-footer-links {
      display: flex;
      gap: 20px;
      justify-content: center;
      flex-wrap: wrap;
      margin-bottom: 14px;
    }
    .cfi-footer-links a {
      color: rgba(255,255,255,0.55);
      text-decoration: none;
      font-size: 0.875rem;
    }
    .cfi-footer-links a:hover { color: #fff; }
    .cfi-footer-copy { font-size: 0.8rem; }

    /* ── Responsive ──────────────────────────────────────────────── */
    @media (max-width: 640px) {
      .cfi-palette-row { grid-template-columns: repeat(5, 1fr); gap: 6px; }
      .cfi-kit-cta { flex-direction: column; gap: 12px; }
      .cfi-kit-cta-btn { width: 100%; justify-content: center; }
      .cfi-nav-links { display: none; }
    }