:root {
      --bg:         #ffffff;
      --bg-alt:      #f8fafc;
      --bg-card:     #ffffff;
      --bg-hero:     linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 40%, #f8fafc 100%);
      --border:      #e5e7eb;
      --text-1:      #0f172a;
      --text-2:      #475569;
      --text-3:      #94a3b8;
      --accent:      #0284c7;
      --accent-h:    #0369a1;
      --accent-faint:#e0f2fe;
      --accent-text: #0ea5e9;
      --nav-bg:      rgba(255,255,255,0.92);
      --nav-border:  rgba(0,0,0,0.07);
      --popular-glow:rgba(2,132,199,0.2);
      --shadow:      0 4px 20px rgba(0,0,0,0.08);
      --shadow-lg:   0 8px 40px rgba(0,0,0,0.12);
      --chat-user-bg:#0284c7;
      --chat-bot-bg: #f1f5f9;
      --chat-bot-c:  #0f172a;
      --chat-wrap:   #ffffff;
      --check:       #059669;
    }
    html.dark {
      --bg:          #0b0f1c;
      --bg-alt:      #0f1524;
      --bg-card:     #131d30;
      --bg-hero:     linear-gradient(135deg, #0b0f1c 0%, #0f1524 100%);
      --border:      #1b273d;
      --text-1:      #f0f4fd;
      --text-2:      #8b9ab8;
      --text-3:      #4e5e7c;
      --accent:      #22d3ee;
      --accent-h:    #67e8f9;
      --accent-faint:rgba(34,211,238,0.08);
      --accent-text: #22d3ee;
      --nav-bg:      rgba(11,15,28,0.88);
      --nav-border:  rgba(255,255,255,0.05);
      --popular-glow:rgba(34,211,238,0.2);
      --shadow:      0 4px 20px rgba(0,0,0,0.4);
      --shadow-lg:   0 8px 40px rgba(0,0,0,0.5);
      --chat-user-bg:#22d3ee;
      --chat-bot-bg: #1a2540;
      --chat-bot-c:  #d6e4f7;
      --chat-wrap:   #131d30;
      --check:       #34d399;
    }

    *, *::before, *::after { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      font-family: 'Inter', system-ui, sans-serif;
      background: var(--bg);
      color: var(--text-1);
      transition: background 0.25s, color 0.25s;
      margin: 0;
    }
    .hf { font-family: 'Space Grotesk', sans-serif; }

    nav {
      position: sticky; top: 0; z-index: 50;
      background: var(--nav-bg);
      border-bottom: 1px solid var(--nav-border);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
    }
    .nav-link {
      position: relative;
      color: var(--text-2);
      font-size: 14px;
      font-weight: 500;
      text-decoration: none;
      padding-bottom: 2px;
      cursor: pointer;
      transition: color 0.2s;
    }
    .nav-link:hover { color: var(--text-1); }
    .nav-link::after {
      content: '';
      position: absolute; bottom: -2px; left: 0;
      width: 0; height: 2px;
      background: var(--accent);
      transition: width 0.3s ease;
    }
    .nav-link:hover::after { width: 100%; }

    .btn-primary {
      display: inline-flex; align-items: center; gap: 8px;
      padding: 11px 22px;
      background: var(--accent);
      color: #ffffff;
      font-weight: 600; font-size: 14px;
      border: none; border-radius: 9px;
      cursor: pointer; text-decoration: none;
      transition: background 0.2s, transform 0.15s, box-shadow 0.2s;
      box-shadow: 0 0 0 0 var(--popular-glow);
    }
    .btn-primary:hover {
      background: var(--accent-h);
      transform: translateY(-1px);
      box-shadow: 0 4px 18px var(--popular-glow);
    }
    .btn-ghost {
      display: inline-flex; align-items: center; gap: 8px;
      padding: 11px 22px;
      background: transparent;
      color: var(--text-2);
      font-weight: 600; font-size: 14px;
      border: 1px solid var(--border);
      border-radius: 9px;
      cursor: pointer; text-decoration: none;
      transition: all 0.2s;
    }
    .btn-ghost:hover {
      color: var(--text-1);
      border-color: var(--accent);
      background: var(--accent-faint);
    }
    .btn-theme {
      width: 38px; height: 38px;
      display: flex; align-items: center; justify-content: center;
      background: var(--bg-alt);
      border: 1px solid var(--border);
      border-radius: 8px;
      color: var(--text-2);
      cursor: pointer;
      transition: all 0.2s;
    }
    .btn-theme:hover { color: var(--text-1); border-color: var(--accent); }

    .section-alt { background: var(--bg-alt); }
    .section-hero { background: var(--bg-hero); }

    .card {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: 14px;
      transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s;
    }
    .card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-lg);
      border-color: var(--accent);
    }

    .feat-icon {
      width: 44px; height: 44px;
      border-radius: 10px;
      background: var(--accent-faint);
      color: var(--accent-text);
      display: flex; align-items: center; justify-content: center;
      font-size: 18px;
      flex-shrink: 0;
    }

    .step-num {
      width: 52px; height: 52px;
      border-radius: 50%;
      background: var(--accent);
      color: #fff;
      font-size: 20px; font-weight: 700;
      display: flex; align-items: center; justify-content: center;
      margin: 0 auto 20px;
      flex-shrink: 0;
    }

    .check-item {
      display: flex; align-items: flex-start; gap: 10px;
      font-size: 14px;
      color: var(--text-2);
      line-height: 1.55;
    }
    .check-item i { color: var(--check); margin-top: 10px; flex-shrink: 0; }

    .demo-wrap {
      background: var(--chat-wrap);
      border: 1px solid var(--border);
      border-radius: 20px;
      padding: 24px;
      box-shadow: var(--shadow-lg);
      max-width: 380px;
      width: 100%;
    }
    .msg-user {
      margin-left: auto;
      max-width: 76%;
      background: var(--chat-user-bg);
      color: #fff;
      padding: 10px 16px;
      border-radius: 18px 18px 4px 18px;
      font-size: 13.5px;
      line-height: 1.5;
    }
    .msg-bot {
      max-width: 82%;
      background: var(--chat-bot-bg);
      color: var(--chat-bot-c);
      padding: 10px 16px;
      border-radius: 18px 18px 18px 4px;
      font-size: 13.5px;
      line-height: 1.5;
    }
    .accent-text { color: var(--accent-text); font-weight: 600; }

    .trust-bar {
      display: flex; align-items: center; gap: 6px;
      font-size: 13px;
      color: var(--text-3);
    }
    .trust-bar i { color: var(--check); font-size: 12px; }

    .pricing-toggle {
      display: inline-flex;
      background: var(--bg-alt);
      border: 1px solid var(--border);
      border-radius: 10px;
      padding: 4px;
    }
    .toggle-opt {
      padding: 8px 24px;
      border-radius: 7px;
      font-size: 14px; font-weight: 600;
      cursor: pointer;
      color: var(--text-2);
      transition: all 0.25s;
      user-select: none;
      white-space: nowrap;
    }
    .toggle-opt.active {
      background: var(--bg-card);
      color: var(--text-1);
      box-shadow: var(--shadow);
    }

    /* ── Pricing cards ── */
    .p-card {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: 14px;
      padding: 32px;
      display: flex;
      flex-direction: column;
      transition: box-shadow 0.25s, border-color 0.25s;
    }
    .p-card.popular {
      border-color: var(--accent);
      box-shadow: 0 0 0 3px var(--popular-glow), var(--shadow-lg);
    }
    .p-badge {
      display: inline-block;
      background: var(--accent);
      color: #fff;
      font-size: 11px; font-weight: 700;
      padding: 3px 12px; border-radius: 20px;
      margin-bottom: 16px; text-transform: uppercase; letter-spacing: 0.05em;
    }
    .p-name { font-size: 22px; font-weight: 700; color: var(--text-1); margin: 0; }
    .p-price {
      font-size: 48px; font-weight: 700;
      color: var(--text-1);
      line-height: 1; margin: 12px 0 4px;
      font-family: 'Space Grotesk', sans-serif;
    }
    .p-period { font-size: 14px; color: var(--text-2); margin: 0; }
    .p-desc { font-size: 14px; color: var(--text-2); margin: 8px 0 20px; }
    .p-feature { display: flex; gap: 10px; align-items: flex-start; font-size: 14px; color: var(--text-2); line-height: 1.5; }
    .p-feature i { color: var(--check); margin-top: 10px; flex-shrink: 0; }
    .p-note { font-size: 12px; color: var(--text-3); margin-top: 20px; padding-top: 16px; border-top: 1px solid var(--border); }
    .p-cta {
      display: flex; align-items: center; justify-content: center; gap: 8px;
      margin-top: 24px; padding: 12px;
      background: var(--accent); color: #fff;
      border: none; border-radius: 9px;
      font-size: 14px; font-weight: 600;
      cursor: pointer; text-decoration: none;
      transition: background 0.2s;
    }
    .p-cta:hover { background: var(--accent-h); }

    .int-badge {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: 14px;
      padding: 32px 40px;
      display: flex; flex-direction: column; align-items: center;
      text-align: center; width: 260px;
      transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s;
    }
    .int-badge:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
      border-color: var(--accent);
    }
    .int-icon {
      width: 56px; height: 56px;
      border-radius: 14px;
      background: var(--accent-faint);
      color: var(--accent-text);
      display: flex; align-items: center; justify-content: center;
      font-size: 24px; margin-bottom: 14px;
    }
    .int-badge h4 { font-size: 18px; font-weight: 700; color: var(--text-1); margin: 0 0 6px; }
    .int-badge p { font-size: 13px; color: var(--text-2); margin: 0; }
    .int-badge .int-status {
      margin-top: 14px; font-size: 12px; font-weight: 600;
      color: var(--check); display: flex; align-items: center; gap: 5px;
    }

    .form-field { display: flex; flex-direction: column; gap: 6px; }
    .form-field label { font-size: 13px; font-weight: 600; color: var(--text-2); }
    .form-field input,
    .form-field select,
    .form-field textarea {
      background: var(--bg-alt);
      border: 1px solid var(--border);
      border-radius: 8px;
      padding: 10px 14px;
      font-size: 14px;
      color: var(--text-1);
      font-family: inherit;
      outline: none;
      transition: border-color 0.2s, box-shadow 0.2s;
      width: 100%;
    }
    .form-field input:focus,
    .form-field select:focus,
    .form-field textarea:focus {
      border-color: var(--accent);
      box-shadow: 0 0 0 3px var(--popular-glow);
    }
    .form-field input::placeholder,
    .form-field textarea::placeholder { color: var(--text-3); }
    .form-field select option { background: var(--bg-card); color: var(--text-1); }

    footer {
      background: #070d1c;
      color: #5a6d8c;
      border-top: 1px solid #0e1a2c;
    }

    @keyframes fadeUp {
      from { opacity: 0; transform: translateY(24px); }
      to   { opacity: 1; transform: translateY(0); }
    }
    .fade-up { animation: fadeUp 0.7s ease backwards; }
    .delay-1 { animation-delay: 0.15s; }
    .delay-2 { animation-delay: 0.3s; }

    /* ── Hero grid default (desktop) ── */
    .hero-grid { grid-template-columns: 1fr 1fr; }

    /* ── Hamburger: hidden by default on desktop ── */
    .btn-hamburger {
      display: none !important;
      width: 38px; height: 38px;
      align-items: center; justify-content: center;
      background: var(--bg-alt);
      border: 1px solid var(--border);
      border-radius: 8px;
      color: var(--text-2);
      cursor: pointer;
      transition: all 0.2s;
      flex-shrink: 0;
    }
    .btn-hamburger:hover { color: var(--text-1); border-color: var(--accent); }

    /* ── Mobile dropdown menu ── */
    .mobile-menu {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, opacity 0.3s ease;
      opacity: 0;
      border-top: 0px solid var(--nav-border);
      background: var(--nav-bg);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
    }
    .mobile-menu.open {
      max-height: 400px;
      opacity: 1;
      border-top: 1px solid var(--nav-border);
    }
    .mobile-nav-link {
      display: block !important;
      color: var(--text-2);
      font-size: 15px;
      font-weight: 500;
      text-decoration: none;
      padding: 13px 0;
      cursor: pointer;
      border-bottom: 1px solid var(--border);
      transition: color 0.2s, padding-left 0.2s;
    }
    .mobile-nav-link:last-child { border-bottom: none; }
    .mobile-nav-link:hover { color: var(--text-1); padding-left: 6px; }
    .mobile-menu-cta {
      display: block !important;
      margin-top: 14px;
      margin-bottom: 6px;
      text-align: center;
      text-decoration: none;
    }

    /* ── Tablet: ≤ 1024px ── */
    @media (max-width: 1024px) {
      .int-badge { width: 220px; padding: 24px 28px; }
    }

    /* ── Mobile: ≤ 768px ── */
    @media (max-width: 768px) {
      /* Nav: hide links, show hamburger */
      .nav-links   { display: none !important; }
      .btn-hamburger { display: flex !important; }
      /* Hide desktop CTA — it lives in mobile menu */
      .nav-cta     { display: none !important; }

      /* Hero */
      .hero-grid { grid-template-columns: 1fr !important; gap: 2rem; }

      /* Section headings */
      h2.text-5xl { font-size: clamp(1.7rem, 6vw, 2.4rem) !important; }
      h2.text-4xl { font-size: clamp(1.4rem, 5.5vw, 2rem)  !important; }

      /* Section padding */
      .py-24 { padding-top: 3.5rem !important; padding-bottom: 3.5rem !important; }
      .mb-16 { margin-bottom: 2.5rem !important; }
      .mb-14 { margin-bottom: 2rem   !important; }

      /* Contact form: 2-col → 1-col */
      .grid.grid-cols-2 { grid-template-columns: 1fr !important; }

      /* Integration badges */
      .int-badge { width: 100%; max-width: 340px; padding: 24px; }

      /* Pricing */
      .p-card  { padding: 24px; }
      .p-price { font-size: 36px; }

      /* Chat demo: show centered below hero text */
      .hidden.md\:flex { display: flex !important; justify-content: center; }
      .demo-wrap { max-width: 100%; }

      /* Trust bar */
      .trust-bar { font-size: 12px; }
    }

    /* ── Small phones: ≤ 480px ── */
    @media (max-width: 480px) {
      nav .max-w-7xl         { padding-left: 1rem; padding-right: 1rem; }
      .mobile-menu .max-w-7xl { padding-left: 1rem; padding-right: 1rem; }

      h2.text-5xl { font-size: 1.55rem !important; }
      h2.text-4xl { font-size: 1.35rem !important; }

      .py-24 { padding-top: 2.5rem !important; padding-bottom: 2.5rem !important; }

      .card.p-8 { padding: 1.25rem !important; }
      .card.p-7 { padding: 1.25rem !important; }
      .p-card   { padding: 20px; }

      #cf-country { width: 110px; }

      footer .flex.gap-6 { gap: 1rem; flex-wrap: wrap; justify-content: center; }
    }