:root {
      --primary: #161D25;
      --primary-dark: #0E1A2B;
      --secondary: #FFFFFF;
      --background: #F6F7F9;
      --card: #FFFFFF;
      --field: #F3F4F6;
      --border: #D8DCE2;
      --text-muted: #6B7280;
      --error: #B3261E;
      --text: #161D25;
      --shadow: 0 18px 45px rgba(31, 41, 55, 0.10);
      --radius: 22px;
    }

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

    html { scroll-behavior: smooth; }

    body {
      font-family: Arial, Helvetica, sans-serif;
      color: var(--text);
      background: var(--background);
      line-height: 1.6;
    }

    a { color: inherit; text-decoration: none; }

    .container {
      width: min(1120px, calc(100% - 32px));
      margin: 0 auto;
    }

    header {
      position: sticky;
      top: 0;
      z-index: 10;
      background: rgba(246, 247, 249, 0.86);
      backdrop-filter: blur(14px);
      border-bottom: 1px solid rgba(216, 220, 226, 0.8);
    }

    .nav {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 18px 0;
    }

    .brand {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 800;
      font-size: 22px;
      letter-spacing: -0.5px;
    }

    .brand-icon {
      width: 42px;
      height: 42px;
      border-radius: 14px;
      display: grid;
      place-items: center;
      background: linear-gradient(135deg, var(--primary), var(--primary-dark));
      box-shadow: 0 8px 20px rgba(22, 29, 37, 0.22);
      overflow: hidden;
    }

    .brand-icon img {
      width: 26px;
      height: 26px;
      object-fit: contain;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 24px;
      color: var(--text-muted);
      font-size: 14px;
    }

    .nav-links a:hover { color: var(--primary-dark); }

    .btn {
      border: none;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 13px 20px;
      border-radius: 999px;
      font-weight: 700;
      transition: 0.2s ease;
    }

    .btn-primary {
      color: #fff;
      background: linear-gradient(135deg, var(--primary), var(--primary-dark));
      box-shadow: 0 14px 30px rgba(22, 29, 37, 0.18);
    }

    .btn-primary:hover:not(:disabled) {
      transform: translateY(-2px);
      box-shadow: 0 18px 36px rgba(22, 29, 37, 0.24);
    }

    .btn:disabled {
      cursor: not-allowed;
      opacity: 0.45;
      transform: none;
      box-shadow: none;
    }

    .hero {
      position: relative;
      overflow: hidden;
      padding: 92px 0 72px;
    }

    .hero::before {
      content: "";
      position: absolute;
      width: 520px;
      height: 520px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(22, 29, 37, 0.10), transparent 65%);
      right: -160px;
      top: -150px;
      pointer-events: none;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 52px;
      align-items: center;
    }

    .badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 8px 13px;
      border-radius: 999px;
      background: rgba(22, 29, 37, 0.08);
      color: var(--primary-dark);
      font-size: 14px;
      font-weight: 700;
      margin-bottom: 18px;
    }

    h1 {
      font-size: clamp(38px, 6vw, 64px);
      line-height: 1.04;
      letter-spacing: -2px;
      margin-bottom: 20px;
    }

    .gradient-text {
      background: linear-gradient(135deg, var(--primary), var(--primary-dark));
      -webkit-background-clip: text;
      background-clip: text;
      color: transparent;
    }

    .hero p {
      font-size: 18px;
      color: var(--text-muted);
      max-width: 610px;
      margin-bottom: 28px;
    }

    .hero-actions { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }

    .btn-light {
      background: #fff;
      color: var(--text);
      border: 1px solid var(--border);
    }

    .mockup {
      background: rgba(255, 255, 255, 0.72);
      border: 1px solid rgba(216, 220, 226, 0.9);
      box-shadow: var(--shadow);
      border-radius: 34px;
      padding: 22px;
    }

    .mockup-card {
      background: #fff;
      border-radius: 26px;
      padding: 24px;
      border: 1px solid var(--border);
    }

    .mockup-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; }

    .pill {
      font-size: 12px;
      color: var(--secondary);
      background: var(--primary-dark);
      padding: 6px 10px;
      border-radius: 999px;
      font-weight: 700;
    }

    .opportunity {
      padding: 16px;
      border-radius: 18px;
      border: 1px solid var(--border);
      margin-top: 12px;
      background: linear-gradient(180deg, #ffffff, #f7f8fa);
    }

    .opportunity strong { display: block; margin-bottom: 4px; }
    .opportunity span { color: var(--text-muted); font-size: 14px; }

    section { padding: 72px 0; }

    .section-title { text-align: center; max-width: 760px; margin: 0 auto 38px; }
    .section-title h2 { font-size: clamp(30px, 4vw, 44px); letter-spacing: -1px; margin-bottom: 12px; }
    .section-title p { color: var(--text-muted); font-size: 17px; }

    .cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }

    .card {
      background: var(--card);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 26px;
      box-shadow: 0 10px 28px rgba(31, 41, 55, 0.05);
    }

    .icon {
      width: 48px;
      height: 48px;
      border-radius: 16px;
      display: grid;
      place-items: center;
      color: #fff;
      background: linear-gradient(135deg, var(--primary), var(--primary-dark));
      margin-bottom: 18px;
      font-size: 22px;
    }

    .card h3 { font-size: 20px; margin-bottom: 8px; }
    .card p { color: var(--text-muted); font-size: 15px; }

    .steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; counter-reset: step; }

    .step {
      background: #fff;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 24px;
      position: relative;
    }

    .step::before {
      counter-increment: step;
      content: counter(step);
      width: 34px;
      height: 34px;
      border-radius: 50%;
      background: rgba(22, 29, 37, 0.08);
      color: var(--primary-dark);
      display: grid;
      place-items: center;
      font-weight: 800;
      margin-bottom: 16px;
    }

    .step h3 { font-size: 18px; margin-bottom: 8px; }
    .step p { color: var(--text-muted); font-size: 15px; }

    .contact-wrap { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 26px; align-items: start; }

    .contact-info,
    form {
      background: #fff;
      border: 1px solid var(--border);
      border-radius: 28px;
      padding: 30px;
      box-shadow: 0 10px 28px rgba(31, 41, 55, 0.05);
    }

    .contact-info h2 { font-size: 34px; line-height: 1.1; margin-bottom: 14px; }
    .contact-info p { color: var(--text-muted); margin-bottom: 18px; }

    .field { margin-bottom: 16px; }

    label { display: block; font-size: 14px; font-weight: 700; margin-bottom: 7px; }

    input,
    textarea,
    select {
      width: 100%;
      border: 1px solid var(--border);
      background: var(--field);
      border-radius: 14px;
      padding: 13px 14px;
      font: inherit;
      outline: none;
      color: var(--text);
    }

    input:focus,
    textarea:focus,
    select:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 4px rgba(22, 29, 37, 0.12);
      background: #fff;
    }

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

    .form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }

    .field-error {
      display: none;
      margin-top: 6px;
      color: var(--error);
      font-size: 13px;
      font-weight: 600;
    }

    .field.invalid .field-error { display: block; }

    .field.invalid input,
    .field.invalid textarea,
    .field.invalid select {
      border-color: var(--error);
      background: #fff8f7;
    }

    .checkbox-field {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      margin: 4px 0 18px;
      color: var(--text-muted);
      font-size: 14px;
    }

    .checkbox-field input {
      width: 18px;
      height: 18px;
      margin-top: 3px;
      accent-color: var(--primary);
      flex: 0 0 auto;
    }

    .checkbox-field label {
      margin: 0;
      font-weight: 600;
      cursor: pointer;
    }

    .form-message {
      display: none;
      margin-top: 14px;
      padding: 12px 14px;
      border-radius: 14px;
      background: rgba(22, 29, 37, 0.08);
      color: var(--primary-dark);
      font-weight: 700;
      font-size: 14px;
    }

    footer {
      padding: 28px 0;
      border-top: 1px solid var(--border);
      color: var(--text-muted);
      font-size: 14px;
      text-align: center;
    }

    @media (max-width: 880px) {
      .hero-grid,
      .contact-wrap { grid-template-columns: 1fr; }
      .cards,
      .steps { grid-template-columns: 1fr 1fr; }
      .nav-links { display: none; }
    }

    @media (max-width: 580px) {
      .hero { padding-top: 58px; }
      .cards,
      .steps,
      .form-row { grid-template-columns: 1fr; }
      .mockup { padding: 14px; border-radius: 24px; }
    }