:root {
      --purple-900: #1e0a4a;
      --purple-800: #2d1060;
      --purple-700: #3b1580;
      --purple-600: #4c1d95;
      --purple-500: #5b21b6;
      --purple-400: #7c3aed;
      --purple-300: #a78bfa;
      --purple-100: #ede9fe;
      --purple-50: #f5f3ff;
      --accent: #c4b5fd;
      --white: #ffffff;
      --gray-50: #f8f7ff;
      --gray-100: #f0eeff;
      --gray-200: #e4e0f7;
      --gray-500: #6b7280;
      --gray-700: #374151;
      --gray-900: #111827;
      --font-display: 'Plus Jakarta Sans', sans-serif;
      --font-body: 'DM Sans', sans-serif;
      --radius: 16px;
      --radius-sm: 8px;
      --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

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

    html { scroll-behavior: smooth; }

    body {
      font-family: var(--font-body);
      color: var(--gray-900);
      background: var(--white);
      line-height: 1.6;
      overflow-x: hidden;
    }

    /* ── NAV ── */
    nav {
      position: fixed;
      top: 0; left: 0; right: 0;
      z-index: 100;
      padding: 0 5vw;
      height: 64px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      background: rgba(30, 10, 74, 0.92);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(196, 181, 253, 0.1);
    }

    .nav-logo {
      font-family: var(--font-display);
      font-weight: 800;
      font-size: 1.1rem;
      color: var(--white);
      text-decoration: none;
      letter-spacing: -0.02em;
    }

    .nav-right {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .nav-links {
      display: flex;
      gap: 24px;
      list-style: none;
    }

    .nav-links a {
      font-size: 0.875rem;
      color: var(--accent);
      text-decoration: none;
      opacity: 0.8;
      transition: opacity var(--transition);
    }

    .nav-links a:hover { opacity: 1; }

    .lang-toggle {
      display: flex;
      background: rgba(255,255,255,0.08);
      border-radius: 20px;
      padding: 3px;
      gap: 2px;
    }

    .lang-btn {
      background: none;
      border: none;
      color: var(--accent);
      font-size: 0.75rem;
      font-family: var(--font-body);
      font-weight: 500;
      padding: 4px 10px;
      border-radius: 16px;
      cursor: pointer;
      transition: all var(--transition);
      opacity: 0.6;
    }

    .lang-btn.active {
      background: var(--purple-400);
      color: var(--white);
      opacity: 1;
    }

    .btn-install-nav {
      background: var(--purple-400);
      color: var(--white);
      font-size: 0.8rem;
      font-family: var(--font-body);
      font-weight: 500;
      padding: 8px 18px;
      border-radius: 20px;
      text-decoration: none;
      border: none;
      cursor: pointer;
      transition: background var(--transition), transform var(--transition);
    }

    .btn-install-nav:hover {
      background: var(--purple-300);
      transform: translateY(-1px);
    }

    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: none;
      border: none;
      cursor: pointer;
      padding: 4px;
    }

    .hamburger span {
      display: block;
      width: 22px;
      height: 2px;
      background: var(--white);
      border-radius: 2px;
      transition: all var(--transition);
    }

    /* ── HERO ── */
    #hero {
      min-height: 100vh;
      background: linear-gradient(135deg, var(--purple-900) 0%, var(--purple-700) 50%, var(--purple-600) 100%);
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      padding: 100px 5vw 60px;
      position: relative;
      overflow: hidden;
      text-align: center;
    }

    #hero::before {
      content: '';
      position: absolute;
      top: -40%;
      left: -20%;
      width: 80vw;
      height: 80vw;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(124, 58, 237, 0.3) 0%, transparent 70%);
      pointer-events: none;
    }

    #hero::after {
      content: '';
      position: absolute;
      bottom: -30%;
      right: -15%;
      width: 60vw;
      height: 60vw;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(167, 139, 250, 0.15) 0%, transparent 70%);
      pointer-events: none;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: rgba(196, 181, 253, 0.15);
      border: 1px solid rgba(196, 181, 253, 0.3);
      color: var(--accent);
      font-size: 0.8rem;
      font-weight: 500;
      padding: 6px 14px;
      border-radius: 20px;
      margin-bottom: 24px;
      animation: fadeInDown 0.6s ease forwards;
    }

    .hero-badge svg { width: 14px; height: 14px; }

    .hero-title {
      font-family: var(--font-display);
      font-weight: 700;
      font-size: clamp(2.4rem, 6vw, 4.5rem);
      color: var(--white);
      line-height: 1.08;
      letter-spacing: -0.025em;
      margin-bottom: 20px;
      max-width: 800px;
      animation: fadeInUp 0.7s 0.1s ease both;
    }

    .hero-title span {
      background: linear-gradient(135deg, var(--accent), #e0d7ff);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .hero-sub {
      font-size: clamp(1rem, 2vw, 1.2rem);
      color: rgba(255,255,255,0.75);
      max-width: 560px;
      margin-bottom: 36px;
      font-weight: 300;
      line-height: 1.7;
      animation: fadeInUp 0.7s 0.2s ease both;
    }

    .hero-ctas {
      display: flex;
      gap: 14px;
      flex-wrap: wrap;
      justify-content: center;
      animation: fadeInUp 0.7s 0.3s ease both;
    }

    .btn-primary {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: var(--white);
      color: var(--purple-600);
      font-family: var(--font-body);
      font-weight: 600;
      font-size: 0.95rem;
      padding: 14px 28px;
      border-radius: 30px;
      text-decoration: none;
      transition: all var(--transition);
      box-shadow: 0 8px 24px rgba(0,0,0,0.2);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 12px 32px rgba(0,0,0,0.3);
    }

    .btn-secondary {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(255,255,255,0.1);
      color: var(--white);
      font-family: var(--font-body);
      font-weight: 500;
      font-size: 0.95rem;
      padding: 14px 28px;
      border-radius: 30px;
      text-decoration: none;
      border: 1px solid rgba(255,255,255,0.25);
      transition: all var(--transition);
    }

    .btn-secondary:hover {
      background: rgba(255,255,255,0.18);
      transform: translateY(-2px);
    }

    .hero-image {
      margin-top: 56px;
      width: 100%;
      max-width: 860px;
      border-radius: 20px;
      overflow: hidden;
      box-shadow: 0 32px 80px rgba(0,0,0,0.45);
      border: 1px solid rgba(255,255,255,0.1);
      animation: fadeInUp 0.8s 0.4s ease both;
      position: relative;
      z-index: 1;
    }

    .hero-image img {
      width: 100%;
      display: block;
    }

    .hero-image-placeholder {
      width: 100%;
      height: 400px;
      background: linear-gradient(135deg, rgba(124,58,237,0.4), rgba(76,29,149,0.6));
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 16px;
      color: rgba(255,255,255,0.5);
      font-size: 0.875rem;
    }

    .hero-image-placeholder svg {
      width: 48px; height: 48px;
      opacity: 0.4;
    }

    /* ── TRUST STRIP ── */
    .trust-strip {
      background: var(--gray-50);
      padding: 20px 5vw;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 40px;
      flex-wrap: wrap;
      border-bottom: 1px solid var(--gray-200);
    }

    .trust-item {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 0.85rem;
      color: var(--gray-500);
      font-weight: 500;
    }

    .trust-item svg {
      width: 16px; height: 16px;
      color: var(--purple-400);
    }

    /* ── SECTIONS GENERAL ── */
    section {
      padding: 96px 5vw;
    }

    .section-label {
      display: inline-block;
      font-size: 0.75rem;
      font-weight: 600;
      letter-spacing: 0.12em;
      text-transform: uppercase;
      color: var(--purple-500);
      margin-bottom: 12px;
    }

    .section-title {
      font-family: var(--font-display);
      font-weight: 700;
      font-size: clamp(1.8rem, 3.5vw, 2.8rem);
      letter-spacing: -0.02em;
      line-height: 1.15;
      color: var(--gray-900);
      margin-bottom: 16px;
    }

    .section-sub {
      font-size: 1.05rem;
      color: var(--gray-500);
      max-width: 580px;
      line-height: 1.7;
      font-weight: 300;
    }

    .section-header {
      margin-bottom: 56px;
    }

    .section-header.centered {
      text-align: center;
      display: flex;
      flex-direction: column;
      align-items: center;
    }

    /* ── FEATURES GRID ── */
    #features {
      background: var(--white);
    }

    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .feature-card {
      background: var(--gray-50);
      border: 1px solid var(--gray-200);
      border-radius: var(--radius);
      padding: 32px;
      transition: all var(--transition);
      position: relative;
      overflow: hidden;
    }

    .feature-card::before {
      content: '';
      position: absolute;
      top: 0; left: 0; right: 0;
      height: 3px;
      background: linear-gradient(90deg, var(--purple-400), var(--purple-300));
      opacity: 0;
      transition: opacity var(--transition);
    }

    .feature-card:hover {
      border-color: var(--purple-300);
      transform: translateY(-4px);
      box-shadow: 0 16px 40px rgba(91,33,182,0.12);
    }

    .feature-card:hover::before { opacity: 1; }

    .feature-icon {
      width: 48px; height: 48px;
      background: linear-gradient(135deg, var(--purple-600), var(--purple-400));
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
    }

    .feature-icon svg {
      width: 22px; height: 22px;
      color: var(--white);
    }

    .feature-card h3 {
      font-family: var(--font-display);
      font-weight: 700;
      font-size: 1.1rem;
      color: var(--gray-900);
      margin-bottom: 10px;
    }

    .feature-card p {
      font-size: 0.9rem;
      color: var(--gray-500);
      line-height: 1.65;
    }

    /* ── HOW IT WORKS ── */
    #how-it-works {
      background: var(--purple-900);
      color: var(--white);
    }

    #how-it-works .section-title { color: var(--white); }
    #how-it-works .section-sub { color: rgba(255,255,255,0.6); }
    #how-it-works .section-label { color: var(--accent); }

    .steps-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 0;
      position: relative;
    }

    .steps-grid::before {
      content: '';
      position: absolute;
      top: 36px;
      left: 12.5%;
      right: 12.5%;
      height: 2px;
      background: linear-gradient(90deg, var(--purple-400), var(--purple-300), var(--accent));
      z-index: 0;
    }

    .step {
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
      padding: 0 20px;
      position: relative;
      z-index: 1;
    }

    .step-num {
      width: 72px; height: 72px;
      background: linear-gradient(135deg, var(--purple-600), var(--purple-400));
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-family: var(--font-display);
      font-weight: 800;
      font-size: 1.4rem;
      color: var(--white);
      margin-bottom: 20px;
      border: 3px solid rgba(196,181,253,0.2);
    }

    .step h3 {
      font-family: var(--font-display);
      font-weight: 700;
      font-size: 1rem;
      color: var(--white);
      margin-bottom: 8px;
    }

    .step p {
      font-size: 0.85rem;
      color: rgba(255,255,255,0.55);
      line-height: 1.6;
    }

    /* ── USE CASES ── */
    #use-cases {
      background: var(--gray-50);
    }

    .use-cases-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 32px;
    }

    .use-case-card {
      background: var(--white);
      border-radius: var(--radius);
      padding: 36px;
      border: 1px solid var(--gray-200);
      transition: all var(--transition);
    }

    .use-case-card:hover {
      box-shadow: 0 12px 32px rgba(91,33,182,0.1);
      border-color: var(--purple-300);
      transform: translateY(-2px);
    }

    .use-case-tag {
      display: inline-block;
      background: var(--purple-100);
      color: var(--purple-600);
      font-size: 0.75rem;
      font-weight: 600;
      padding: 4px 12px;
      border-radius: 12px;
      margin-bottom: 16px;
    }

    .use-case-card h3 {
      font-family: var(--font-display);
      font-weight: 700;
      font-size: 1.2rem;
      color: var(--gray-900);
      margin-bottom: 12px;
    }

    .use-case-card p {
      font-size: 0.9rem;
      color: var(--gray-500);
      line-height: 1.65;
    }

    .use-case-card ul {
      list-style: none;
      margin-top: 14px;
      display: flex;
      flex-direction: column;
      gap: 6px;
    }

    .use-case-card li {
      display: flex;
      align-items: flex-start;
      gap: 8px;
      font-size: 0.875rem;
      color: var(--gray-700);
    }

    .use-case-card li::before {
      content: '✓';
      color: var(--purple-400);
      font-weight: 700;
      margin-top: 1px;
      flex-shrink: 0;
    }

    /* ── DATA SECTION ── */
    #data {
      background: var(--white);
    }

    .data-layout {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 80px;
      align-items: center;
    }

    .data-metrics {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }

    .metric-card {
      background: var(--gray-50);
      border: 1px solid var(--gray-200);
      border-radius: var(--radius);
      padding: 24px;
      transition: all var(--transition);
    }

    .metric-card:hover {
      border-color: var(--purple-300);
      box-shadow: 0 8px 24px rgba(91,33,182,0.1);
    }

    .metric-icon {
      font-size: 1.5rem;
      margin-bottom: 10px;
    }

    .metric-card h4 {
      font-family: var(--font-display);
      font-weight: 700;
      font-size: 0.95rem;
      color: var(--gray-900);
      margin-bottom: 4px;
    }

    .metric-card p {
      font-size: 0.8rem;
      color: var(--gray-500);
      line-height: 1.5;
    }

    /* ── FAQ ── */
    #faq {
      background: var(--gray-50);
    }

    .faq-list {
      max-width: 720px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 0;
    }

    .faq-item {
      border-bottom: 1px solid var(--gray-200);
    }

    .faq-question {
      width: 100%;
      background: none;
      border: none;
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 16px;
      padding: 22px 0;
      font-family: var(--font-body);
      font-size: 1rem;
      font-weight: 500;
      color: var(--gray-900);
      cursor: pointer;
      text-align: left;
      transition: color var(--transition);
    }

    .faq-question:hover { color: var(--purple-500); }

    .faq-chevron {
      width: 20px; height: 20px;
      color: var(--purple-400);
      flex-shrink: 0;
      transition: transform var(--transition);
    }

    .faq-item.open .faq-chevron { transform: rotate(180deg); }

    .faq-answer {
      display: none;
      padding: 0 0 20px;
      font-size: 0.9rem;
      color: var(--gray-500);
      line-height: 1.7;
    }

    .faq-item.open .faq-answer { display: block; }

    /* ── CTA BAND ── */
    #cta {
      background: linear-gradient(135deg, var(--purple-700), var(--purple-500));
      text-align: center;
      padding: 96px 5vw;
      position: relative;
      overflow: hidden;
    }

    #cta::before {
      content: '';
      position: absolute;
      top: -50%;
      left: 50%;
      transform: translateX(-50%);
      width: 600px; height: 600px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(255,255,255,0.06) 0%, transparent 70%);
    }

    #cta .section-title { color: var(--white); }

    .cta-sub {
      color: rgba(255,255,255,0.75);
      font-size: 1.05rem;
      max-width: 500px;
      margin: 0 auto 36px;
      line-height: 1.7;
    }

    /* ── VISION FORM ── */
    #vision {
      background: var(--white);
    }

    .vision-layout {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 80px;
      align-items: start;
    }

    .vision-form {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .form-group label {
      display: block;
      font-size: 0.85rem;
      font-weight: 500;
      color: var(--gray-700);
      margin-bottom: 6px;
    }

    .form-group input,
    .form-group textarea {
      width: 100%;
      background: var(--gray-50);
      border: 1.5px solid var(--gray-200);
      border-radius: var(--radius-sm);
      padding: 12px 16px;
      font-family: var(--font-body);
      font-size: 0.9rem;
      color: var(--gray-900);
      transition: border-color var(--transition);
      outline: none;
    }

    .form-group input:focus,
    .form-group textarea:focus {
      border-color: var(--purple-400);
      background: var(--white);
    }

    .form-group textarea { resize: vertical; min-height: 120px; }

    .btn-submit {
      background: var(--purple-500);
      color: var(--white);
      font-family: var(--font-body);
      font-weight: 600;
      font-size: 0.95rem;
      padding: 14px 28px;
      border-radius: 30px;
      border: none;
      cursor: pointer;
      transition: all var(--transition);
      align-self: flex-start;
    }

    .btn-submit:hover {
      background: var(--purple-400);
      transform: translateY(-1px);
    }

    /* ── FOOTER ── */
    footer {
      background: var(--purple-900);
      color: rgba(255,255,255,0.6);
      padding: 48px 5vw;
      display: grid;
      grid-template-columns: 1fr auto;
      gap: 40px;
      align-items: center;
    }

    .footer-left .footer-logo {
      font-family: var(--font-display);
      font-weight: 800;
      font-size: 1.1rem;
      color: var(--white);
      text-decoration: none;
      display: block;
      margin-bottom: 8px;
    }

    .footer-left p {
      font-size: 0.8rem;
      max-width: 360px;
      line-height: 1.6;
    }

    .footer-links {
      display: flex;
      flex-direction: column;
      gap: 8px;
      align-items: flex-end;
    }

    .footer-links a {
      font-size: 0.8rem;
      color: rgba(255,255,255,0.5);
      text-decoration: none;
      transition: color var(--transition);
    }

    .footer-links a:hover { color: var(--accent); }

    .footer-bottom {
      background: var(--purple-900);
      border-top: 1px solid rgba(255,255,255,0.07);
      padding: 16px 5vw;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 0.78rem;
      color: rgba(255,255,255,0.3);
      flex-wrap: wrap;
      gap: 8px;
    }

    .footer-bottom a {
      color: rgba(255,255,255,0.4);
      text-decoration: none;
    }

    /* ── ANIMATIONS ── */
    @keyframes fadeInUp {
      from { opacity: 0; transform: translateY(24px); }
      to   { opacity: 1; transform: translateY(0); }
    }

    @keyframes fadeInDown {
      from { opacity: 0; transform: translateY(-12px); }
      to   { opacity: 1; transform: translateY(0); }
    }

    .reveal {
      opacity: 0;
      transform: translateY(28px);
      transition: opacity 0.6s ease, transform 0.6s ease;
    }

    .reveal.visible {
      opacity: 1;
      transform: translateY(0);
    }

    /* ── RESPONSIVE ── */
    @media (max-width: 1024px) {
      .features-grid { grid-template-columns: repeat(2, 1fr); }
      .steps-grid { grid-template-columns: repeat(2, 1fr); gap: 40px; }
      .steps-grid::before { display: none; }
      .data-layout { grid-template-columns: 1fr; gap: 48px; }
      .vision-layout { grid-template-columns: 1fr; gap: 48px; }
    }

    @media (max-width: 768px) {
      .nav-links { display: none; }
      .hamburger { display: flex; }

      .features-grid { grid-template-columns: 1fr; }
      .use-cases-grid { grid-template-columns: 1fr; }
      .data-metrics { grid-template-columns: 1fr 1fr; }

      footer {
        grid-template-columns: 1fr;
      }
      .footer-links { align-items: flex-start; }

      section { padding: 64px 5vw; }
    }

    @media (max-width: 480px) {
      .data-metrics { grid-template-columns: 1fr; }
      .steps-grid { grid-template-columns: 1fr; }
      .hero-ctas { flex-direction: column; align-items: center; }
    }