:root {
      --blue-50: #EAF6FF;
      --blue-100: #C6E9FF;
      --blue-500: #4BA3D9;
      --blue-700: #276A9B;
      --blue-900: #173F59;

      --green-50: #EAF7ED;
      --green-100: #CFEBD6;
      --green-500: #5AAE53;
      --green-700: #2D7A35;
      --green-900: #174F2B;

      --yellow-50: #FFFBEA;
      --yellow-500: #FFC84D;
      --yellow-700: #C98C1E;

      --mint-100: #E8F5E9;
      --text: #2D3748;
      --text-light: #64748B;
      --text-muted: #6B7280;
      --paper: #F9FAFB;
      --card: #FFFFFF;
      --line: #DCE3EC;
      --shadow: rgba(31, 41, 55, 0.14);
      --font: "Roboto", "Inter", "Segoe UI", Arial, sans-serif;
    }

    * {
      box-sizing: border-box;
      -webkit-font-smoothing: antialiased;
    }

    body {
      margin: 0;
      color: var(--text);
      background:
        radial-gradient(circle at 70% 5%, rgba(75, 163, 217, 0.23), transparent 18%),
        radial-gradient(circle at 30% 90%, rgba(255, 200, 77, 0.20), transparent 12%),
        var(--paper);
      font-family: var(--font);
      line-height: 1.6;
    }

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

    .topbar {
      position: sticky;
      top: 0;
      z-index: 10;
      background: var(--blue-900);
      backdrop-filter: blur(14px);
      border-bottom: 1px solid rgba(220, 227, 236, 0.7);
    }

    .nav {
      max-width: 1180px;
      margin: 0 auto;
      padding: 14px 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
    }

    .brand {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 800;
      font-size: 26px;
      color: var(--blue-50);
      letter-spacing: -0.03em;
      white-space: nowrap;
    }

    .brand-mark {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--blue-500), var(--green-500), var(--yellow-500));
      box-shadow: 0 6px 14px var(--shadow);
      display: flex;
      align-items: center;
      justify-content: center;
      color: white;
      font-size: 22px;
      font-weight: 700;
    }

    .menu {
      display: flex;
      align-items: center;
      gap: 30px;
      font-size: 14px;
      font-weight: 700;
      color: var(--text-light);
    }

    .menu-toggle {
      display: none;
      width: 46px;
      height: 46px;
      border-radius: 50%;
      background: var(--card);
      border: 1px solid var(--line);
      align-items: center;
      justify-content: center;
      cursor: pointer;
      box-shadow: 0 8px 16px var(--shadow);
      padding: 0;
    }

    .menu-toggle span {
      display: block;
      width: 21px;
      height: 2px;
      background: var(--yellow-500);
      border-radius: 2px;
      transition: transform 280ms ease, opacity 280ms ease;
    }

    .menu-toggle span + span {
      margin-top: 5px;
    }

    .menu-toggle.active span:nth-child(1) {
      transform: translateY(7px) rotate(45deg);
    }

    .menu-toggle.active span:nth-child(2) {
      opacity: 0;
    }

    .menu-toggle.active span:nth-child(3) {
      transform: translateY(-7px) rotate(-45deg);
    }

    .menu a {
      position: relative;
      transition: color 260ms ease;
    }

    .menu a::after {
      content: "";
      display: block;
      height: 3px;
      width: 0;
      background: var(--yellow-500);
      border-radius: 999px;
      transition: width 260ms ease;
      margin-top: 5px;
    }

    .menu a:hover {
      color: var(--yellow-500);
    }

    .menu a:hover::after {
      width: 100%;
    }

    .nav-cta {
      padding: 11px 22px;
      border-radius: 999px;
      background: var(--yellow-500);
      color: var(--blue-900);
      font-weight: 800;
      font-size: 13px;
      box-shadow: 0 8px 16px var(--shadow);
      transition: transform 260ms ease, box-shadow 260ms ease, background 260ms ease;
    }

    .nav-cta:hover {
      background: var(--green-500);
      color: white;
      transform: translateY(-3px);
      box-shadow: 0 14px 30px var(--shadow);
    }

    .hero {
      min-height: 620px;
      display: flex;
      align-items: center;
      max-width: 1180px;
      margin: 0 auto;
      padding: 40px 24px 50px;
      gap: 40px;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: minmax(520px, 1.1fr) minmax(420px, 0.9fr);
      align-items: center;
      gap: 40px;
      width: 100%;
    }

    .hero-copy {
      animation: rise 700ms ease;
    }

    .hero-tag {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      background: var(--green-50);
      color: var(--green-700);
      padding: 8px 14px;
      border-radius: 999px;
      border: 1px solid var(--green-100);
      font-size: 12px;
      font-weight: 900;
      letter-spacing: 0.12em;
      text-transform: uppercase;
      margin-bottom: 16px;
    }

    .hero-tag::before {
      content: "";
      width: 8px;
      height: 8px;
      background: var(--green-500);
      border-radius: 50%;
      display: inline-block;
    }

    h1 {
      margin: 0 0 16px;
      color: var(--text);
      font-size: clamp(56px, 5vw, 76px);
      line-height: 1.06;
      font-weight: 800;
      letter-spacing: -0.045em;
    }

    h1 span {
      color: var(--blue-700);
    }

    .hero-copy .lead {
      font-size: 22px;
      color: var(--text-light);
      line-height: 1.7;
      max-width: 620px;
      margin: 0 0 28px;
    }

    .hero-actions {
      display: flex;
      align-items: center;
      gap: 14px;
      flex-wrap: wrap;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      min-width: 160px;
      padding: 14px 22px;
      border-radius: 999px;
      font-weight: 800;
      font-size: 14px;
      transition: transform 260ms ease, box-shadow 260ms ease, background 260ms ease;
      border: none;
      cursor: pointer;
    }

    .btn-primary {
      background: var(--green-500);
      color: white;
      box-shadow: 0 12px 24px var(--shadow);
    }

    .btn-secondary {
      background: var(--card);
      color: var(--blue-700);
      box-shadow: 0 8px 16px var(--shadow);
      border: 1px solid var(--line);
    }

    .btn:hover {
      transform: translateY(-3px);
      box-shadow: 0 16px 30px var(--shadow);
    }

    .hero-proof {
      display: flex;
      align-items: center;
      gap: 30px;
      margin-top: 34px;
      flex-wrap: wrap;
    }

    .proof-item {
      display: flex;
      flex-direction: column;
      align-items: flex-start;
      gap: 4px;
    }

    .proof-number {
      font-size: 32px;
      font-weight: 900;
      color: var(--blue-700);
      line-height: 1;
    }

    .proof-label {
      font-size: 12px;
      font-weight: 800;
      color: var(--text-muted);
      text-transform: uppercase;
      letter-spacing: 0.12em;
    }

    .hero-card-wrap {
      display: flex;
      align-items: center;
      justify-content: center;
      min-height: 460px;
    }

    .hero-card {
      background: var(--card);
      border-radius: 28px;
      border: 1px solid rgba(220, 227, 236, 0.9);
      box-shadow: 0 24px 60px var(--shadow);
      width: min(410px, 100%);
      padding: 12px;
      position: relative;
      transform: rotate(2deg);
      animation: rise 800ms ease;
    }

    .hero-card::before,
    .hero-card::after {
      content: "";
      position: absolute;
      border-radius: 50%;
      background: rgba(139, 195, 74, 0.26);
      filter: blur(16px);
      width: 120px;
      height: 120px;
      z-index: -1;
    }

    .hero-card::before {
      top: -30px;
      left: -20px;
    }

    .hero-card::after {
      right: -20px;
      bottom: -40px;
      background: rgba(255, 200, 77, 0.36);
    }

    .code-window {
      background: linear-gradient(180deg, var(--blue-900), var(--green-900));
      border-radius: 20px;
      color: white;
      overflow: hidden;
      box-shadow: inset 0 0 0 1px rgba(255,255,255,0.08);
    }

    .window-top {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 10px;
      padding: 16px 18px;
      border-bottom: 1px solid rgba(255,255,255,0.08);
      background: rgba(255,255,255,0.03);
    }

    .window-dots {
      display: flex;
      gap: 7px;
    }

    .dot {
      width: 9px;
      height: 9px;
      border-radius: 50%;
      background: var(--yellow-500);
    }

    .dot:nth-child(2) {
      background: var(--green-500);
    }

    .dot:nth-child(3) {
      background: var(--blue-100);
    }

    .window-title {
      font-size: 11px;
      color: var(--green-50);
      font-weight: 800;
      letter-spacing: 0.12em;
      text-transform: uppercase;
      opacity: 0.88;
    }

    .code-content {
      padding: 36px 24px;
      min-height: 330px;
      background-image:
        linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
      background-size: 24px 24px, 24px 24px;
      position: relative;
    }

    .code-content::after {
      content: "";
      position: absolute;
      left: 0;
      right: 0;
      top: 0;
      bottom: 0;
      background-image: radial-gradient(rgba(255,255,255,0.08) 1px, transparent 1px);
      background-size: 22px 22px;
      mask-image: linear-gradient(180deg, rgba(0,0,0,1), transparent 100%);
      pointer-events: none;
    }

    .code-line {
      display: flex;
      align-items: center;
      gap: 12px;
      font-family: "Roboto Mono", "Consolas", monospace;
      font-size: 15px;
      line-height: 2.1;
      color: var(--green-50);
      position: relative;
      z-index: 2;
      white-space: nowrap;
    }

    .code-line .comment {
      color: var(--yellow-500);
      font-style: italic;
      opacity: 0.93;
    }

    .code-line .token {
      color: var(--blue-100);
    }

    .code-line .keyword {
      color: #80DEEA;
      font-weight: 700;
    }

    .playground {
      margin-top: 20px;
      display: flex;
      align-items: center;
      gap: 10px;
      justify-content: space-between;
      flex-wrap: wrap;
    }

    .playground-label {
      font-size: 10px;
      font-weight: 900;
      letter-spacing: 0.12em;
      color: var(--green-50);
      text-transform: uppercase;
    }

    .playground-chip {
      background: rgba(255, 193, 7, 0.25);
      color: var(--yellow-50, #FFF8E1);
      border-radius: 999px;
      padding: 8px 12px;
      font-size: 11px;
      font-weight: 800;
      border: 1px solid var(--yellow-500);
    }

    .section {
      max-width: 1180px;
      margin: 0 auto;
      padding: 54px 24px;
    }

    .section-title {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 30px;
      margin-bottom: 24px;
      flex-wrap: wrap;
    }

    .section-kicker {
      color: var(--green-700);
      font-size: 12px;
      font-weight: 900;
      text-transform: uppercase;
      letter-spacing: 0.14em;
      margin-bottom: 14px;
    }

    .section-title h2 {
      margin: 0;
      font-size: clamp(36px, 4vw, 48px);
      color: var(--text);
      line-height: 1.1;
      letter-spacing: -0.035em;
    }

    .section-title .section-sub {
      max-width: 900px;
      color: var(--text-muted);
      font-size: 16px;
      line-height: 1.7;
    }

    .feature-grid {
      display: grid;
      grid-template-columns: repeat(4, minmax(180px, 1fr));
      gap: 18px;
      margin-top: 20px;
    }

    .feature-card {
      background: var(--card);
      border-radius: 22px;
      padding: 24px;
      box-shadow: 0 10px 26px var(--shadow);
      border: 1px solid rgba(220,227,236,0.7);
      transition: transform 260ms ease, box-shadow 260ms ease;
      min-height: 220px;
    }

    .feature-card:hover {
      transform: translateY(-8px);
      box-shadow: 0 16px 36px var(--shadow);
    }

    .feature-icon {
      width: 50px;
      height: 50px;
      border-radius: 16px;
      background: var(--green-50);
      color: var(--green-700);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 26px;
      margin-bottom: 16px;
      box-shadow: inset 0 0 0 1px var(--green-100);
    }

    .feature-card:nth-child(2) .feature-icon {
      background: var(--blue-50);
      color: var(--blue-700);
    }

    .feature-card:nth-child(3) .feature-icon {
      background: var(--yellow-50);
      color: var(--yellow-700);
    }

    .feature-card:nth-child(4) .feature-icon {
      background: var(--green-50);
      color: var(--green-900);
    }

    .feature-card h3 {
      margin: 0 0 12px;
      color: var(--text);
      font-size: 20px;
      line-height: 1.4;
    }

    .feature-card p {
      margin: 0;
      color: var(--text-muted);
      font-size: 14px;
      line-height: 1.7;
    }

    .scratch-grid {
      display: grid;
      grid-template-columns: minmax(450px, 1fr) minmax(360px, 0.95fr);
      gap: 30px;
      align-items: center;
      background: var(--card);
      border-radius: 28px;
      border: 1px solid var(--line);
      box-shadow: 0 14px 36px var(--shadow);
      padding: 30px;
      margin-top: 22px;
    }

    .scratch-copy {
      padding: 6px 10px;
    }

    .scratch-copy h3 {
      margin: 0 0 14px;
      color: var(--blue-900);
      font-size: clamp(30px, 3vw, 36px);
      line-height: 1.2;
      letter-spacing: -0.025em;
    }

    .scratch-copy p {
      color: var(--text-muted);
      font-size: 16px;
      line-height: 1.8;
      margin: 0 0 16px;
    }

    .scratch-list {
      list-style: none;
      padding: 0;
      margin: 24px 0 0;
      display: grid;
      gap: 12px;
    }

    .scratch-list li {
      color: var(--text);
      font-size: 14px;
      font-weight: 800;
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .scratch-list li::before {
      content: "";
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--yellow-500);
      box-shadow: 0 0 0 4px var(--yellow-50);
    }

    .scratch-card {
      background: var(--blue-50);
      border-radius: 22px;
      padding: 10px;
      border: 1px solid var(--line);
      display: flex;
      align-items: center;
      justify-content: center;
      min-height: 260px;
      box-shadow: inset 0 0 0 1px rgba(255,255,255,0.8);
    }

    .scratch-card img {
      width: 100%;
      height: auto;
      border-radius: 16px;
      display: block;
      box-shadow: 0 12px 26px var(--shadow);
      border: 1px solid rgba(220,227,236,0.8);
    }

    .story {
      background: linear-gradient(135deg, var(--blue-900), var(--blue-700), var(--yellow-700));
      color: white;
      border-radius: 32px;
      padding: 48px 44px;
      box-shadow: 0 24px 60px var(--shadow);
      position: relative;
      overflow: hidden;
    }

    .story::before,
    .story::after {
      content: "";
      position: absolute;
      border-radius: 50%;
      border: 1px solid rgba(255,255,255,0.4);
      width: 240px;
      height: 240px;
      background: transparent;
      top: -80px;
      right: -60px;
    }

    .story::after {
      width: 180px;
      height: 180px;
      bottom: -90px;
      left: -60px;
      top: auto;
      right: auto;
    }

    .story-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
      align-items: center;
      position: relative;
      z-index: 2;
    }

    .story h2 {
      color: white;
      font-size: clamp(34px, 4vw, 44px);
      line-height: 1.2;
      letter-spacing: -0.035em;
      margin: 0 0 16px;
    }

    .story p {
      color: rgba(255,255,255,0.84);
      font-size: 16px;
      line-height: 1.8;
      margin: 0 0 20px;
    }

    .story-list {
      list-style: none;
      padding: 0;
      margin: 26px 0 0;
      display: grid;
      gap: 12px;
    }

    .story-list li {
      color: var(--green-50);
      font-size: 14px;
      font-weight: 700;
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .story-list li::before {
      content: "✓";
      color: var(--yellow-500);
      font-size: 20px;
      font-weight: 900;
      background: rgba(255,255,255,0.08);
      width: 30px;
      height: 30px;
      border-radius: 50%;
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }

    .timeline-card {
      background: rgba(255,255,255,0.12);
      border-radius: 24px;
      padding: 26px;
      border: 1px solid rgba(255,255,255,0.2);
      backdrop-filter: blur(10px);
    }

    .timeline-card .date-label {
      color: var(--green-50);
      font-size: 11px;
      font-weight: 900;
      text-transform: uppercase;
      letter-spacing: 0.14em;
      margin-bottom: 12px;
    }

    .timeline-card .big-date {
      color: white;
      font-size: clamp(70px, 8vw, 96px);
      font-weight: 900;
      line-height: 1;
      font-family: "Roboto", "Segoe UI", Arial, sans-serif;
      margin-bottom: 18px;
    }

    .timeline-card .date-message {
      color: var(--green-50);
      font-size: 16px;
      font-weight: 700;
      line-height: 1.7;
    }

    .start-panel {
      display: grid;
      grid-template-columns: 1fr auto;
      align-items: center;
      gap: 26px;
      background: var(--card);
      border-radius: 26px;
      border: 1px solid var(--line);
      box-shadow: 0 14px 38px var(--shadow);
      padding: 30px 34px;
      margin-top: 30px;
    }

    .start-panel h3 {
      color: var(--text);
      margin: 0 0 8px;
      font-size: clamp(28px, 3vw, 36px);
      letter-spacing: -0.03em;
    }

    .start-panel p {
      margin: 0;
      color: var(--text-muted);
      font-size: 15px;
      line-height: 1.7;
    }

    .start-panel .btn {
      white-space: nowrap;
    }

    footer {
      background: var(--blue-900);
      color: white;
      padding: 40px 24px;
      margin-top: 56px;
    }

    .footer-content {
      max-width: 1180px;
      margin: 0 auto;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 30px;
      flex-wrap: wrap;
    }

    .footer-brand {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 24px;
      font-weight: 900;
      color: white;
    }

    .footer-brand .brand-mark {
      background: white;
      color: var(--green-900);
      width: 34px;
      height: 34px;
      font-size: 18px;
    }

    .footer-links {
      display: flex;
      gap: 30px;
      color: var(--green-50);
      font-size: 13px;
      font-weight: 800;
      text-transform: uppercase;
      letter-spacing: 0.12em;
    }

    .footer-copy {
      color: var(--green-50);
      font-size: 13px;
      opacity: 0.86;
    }

    @keyframes rise {
      from {
        opacity: 0;
        transform: translateY(14px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }

    @media (max-width: 960px) {
      .hero-grid,
      .story-grid,
      .feature-grid {
        grid-template-columns: 1fr;
      }

      .hero {
        min-height: auto;
      }

      h1 {
        font-size: clamp(46px, 10vw, 64px);
      }

      .hero-copy .lead {
        font-size: 20px;
      }

      .hero-grid {
        gap: 26px;
      }

      .hero-card-wrap {
        min-height: auto;
      }

      .feature-grid {
        grid-template-columns: repeat(2, minmax(180px, 1fr));
      }
    }

    @media (max-width: 760px) {
      .nav {
        flex-wrap: wrap;
        position: relative;
      }

      .brand {
        font-size: 22px;
      }

      .brand-mark {
        width: 38px;
        height: 38px;
      }

      .menu-toggle {
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        margin-left: auto;
      }

      .menu {
        display: none;
        order: 4;
        width: 100%;
        flex-direction: column;
        align-items: stretch;
        justify-content: center;
        gap: 8px;
        padding: 14px;
        background: var(--card);
        border-radius: 18px;
        border: 1px solid var(--line);
        box-shadow: 0 14px 34px var(--shadow);
        position: absolute;
        top: calc(100% + 8px);
        left: 0;
        right: 0;
        z-index: 20;
      }

      .menu.open {
        display: flex;
      }

      .menu a {
        width: 100%;
        padding: 12px 14px;
        border-radius: 12px;
        color: var(--text);
        background: var(--paper);
      }

      .menu a::after {
        display: none;
      }

      .nav-cta {
        display: none;
      }

      .hero {
        padding-top: 24px;
      }

      .hero-actions,
      .hero-proof {
        align-items: flex-start;
      }

      .feature-grid {
        grid-template-columns: 1fr;
      }

      .start-panel {
        grid-template-columns: 1fr;
      }

      .footer-content {
        align-items: flex-start;
        flex-direction: column;
      }
    }