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

    :root {
      --bg: #09090b;
      --surface: #111113;
      --surface-2: #151518;
      --border: #252529;
      --text: #f5f5f5;
      --muted: #88888f;
      --purple: #9b7cff;
      --purple-soft: rgba(155, 124, 255, 0.1);
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      min-height: 100vh;

      background: var(--bg);
      color: var(--text);

      font-family: "Inter", sans-serif;

      -webkit-font-smoothing: antialiased;
    }

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

    .container {
      width: min(1080px, calc(100% - 40px));
      margin: 0 auto;
    }

    /* =========================
       NAVIGATION
    ========================= */

    .navbar {
      position: fixed;
      top: 0;
      left: 0;

      width: 100%;
      height: 68px;

      z-index: 100;

      background: rgba(9, 9, 11, 0.88);
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);

      backdrop-filter: blur(14px);
    }

    .nav-inner {
      height: 100%;

      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    .logo {
      font-family: "Space Grotesk", sans-serif;

      font-size: 22px;
      font-weight: 700;

      letter-spacing: -1px;
    }

    .logo span {
      color: var(--purple);
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 28px;

      list-style: none;

      color: var(--muted);
      font-size: 13px;
    }

    .nav-links a {
      transition: color 0.2s ease;
    }

    .nav-links a:hover {
      color: #fff;
    }

    .nav-button {
      padding: 9px 15px;

      border: 1px solid #303034;
      border-radius: 8px;

      background: #f4f4f4;
      color: #09090b;

      font-size: 13px;
      font-weight: 600;

      transition:
        transform 0.2s ease,
        background 0.2s ease;
    }

    .nav-button:hover {
      background: #fff;
      transform: translateY(-1px);
    }

    /* =========================
       HERO
    ========================= */

    .hero {
      min-height: 760px;

      position: relative;
      overflow: hidden;

      display: flex;
      align-items: center;

      padding: 130px 0 100px;

      text-align: center;
    }

    .hero::before {
      content: "";

      position: absolute;

      width: 700px;
      height: 500px;

      top: -230px;
      left: 50%;

      transform: translateX(-50%);

      background: radial-gradient(
        ellipse,
        rgba(139, 92, 246, 0.14),
        transparent 68%
      );

      pointer-events: none;
    }

    .hero-content {
      width: 100%;

      position: relative;
      z-index: 2;
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;

      margin-bottom: 22px;

      color: #a0a0a6;

      font-size: 12px;
      font-weight: 500;
      letter-spacing: 0.04em;
    }

    .eyebrow-dot {
      width: 6px;
      height: 6px;

      border-radius: 50%;

      background: var(--purple);
    }

    .hero h1 {
      max-width: 850px;
      margin: 0 auto;

      font-family: "Space Grotesk", sans-serif;

      font-size: clamp(52px, 8vw, 82px);
      font-weight: 600;

      line-height: 0.98;
      letter-spacing: -4.5px;
    }

    .gradient {
      background: linear-gradient(
        100deg,
        #b7a5ff,
        #e8a1cc
      );

      background-clip: text;
      -webkit-background-clip: text;

      color: transparent;
      -webkit-text-fill-color: transparent;
    }

    .hero-description {
      max-width: 590px;

      margin: 25px auto 30px;

      color: var(--muted);

      font-size: 16px;
      line-height: 1.7;
    }

    .hero-buttons {
      display: flex;
      justify-content: center;

      gap: 9px;
    }

    .button {
      height: 44px;

      display: inline-flex;
      align-items: center;
      justify-content: center;

      padding: 0 18px;

      border-radius: 8px;

      font-size: 13px;
      font-weight: 600;

      transition:
        transform 0.2s ease,
        background 0.2s ease,
        border-color 0.2s ease;
    }

    .button:hover {
      transform: translateY(-2px);
    }

    .button-primary {
      background: #f3f3f3;
      color: #09090b;
    }

    .button-primary:hover {
      background: #fff;
    }

    .button-secondary {
      border: 1px solid var(--border);

      background: transparent;
      color: #c5c5c8;
    }

    .button-secondary:hover {
      background: var(--surface-2);
      border-color: #36363b;
    }

    /* =========================
       MATH DECORATIONS
    ========================= */

    .math {
      position: absolute;

      color: rgba(255, 255, 255, 0.08);

      font-family: "Space Grotesk", sans-serif;

      user-select: none;
      pointer-events: none;
    }

    .math-1 {
      top: 22%;
      left: 7%;

      font-size: 44px;

      transform: rotate(-12deg);
    }

    .math-2 {
      top: 35%;
      right: 8%;

      font-size: 30px;

      transform: rotate(10deg);
    }

    .math-3 {
      bottom: 15%;
      left: 13%;

      font-size: 25px;

      transform: rotate(8deg);
    }

    .math-4 {
      bottom: 18%;
      right: 14%;

      font-size: 42px;

      transform: rotate(-8deg);
    }

    .math-5 {
      top: 18%;
      right: 27%;

      font-size: 17px;

      color: rgba(155, 124, 255, 0.16);
    }

    /* =========================
       FEATURES
    ========================= */

    .features {
      padding: 100px 0;
    }

    .section-header {
      margin-bottom: 38px;
    }

    .section-header h2 {
      margin-bottom: 8px;

      font-family: "Space Grotesk", sans-serif;

      font-size: 31px;
      font-weight: 600;

      letter-spacing: -1.5px;
    }

    .section-header p {
      color: var(--muted);
      font-size: 14px;
    }

    .feature-grid {
      display: grid;

      grid-template-columns: repeat(3, 1fr);

      gap: 12px;
    }

    .feature-card {
      min-height: 220px;

      padding: 24px;

      border: 1px solid var(--border);
      border-radius: 12px;

      background: var(--surface);

      transition:
        background 0.2s ease,
        border-color 0.2s ease,
        transform 0.2s ease;
    }

    .feature-card:hover {
      background: var(--surface-2);
      border-color: #343438;
      transform: translateY(-3px);
    }

    .feature-number {
      margin-bottom: 55px;

      color: #5d5d63;

      font-family: "Space Grotesk", sans-serif;

      font-size: 12px;
    }

    .feature-card h3 {
      margin-bottom: 7px;

      font-family: "Space Grotesk", sans-serif;

      font-size: 17px;
      font-weight: 600;
    }

    .feature-card p {
      color: #77777d;

      font-size: 13px;
      line-height: 1.65;
    }

    /* =========================
       MATH STRIP
    ========================= */

    .math-strip {
      padding: 24px 0;

      overflow: hidden;

      border-top: 1px solid #18181b;
      border-bottom: 1px solid #18181b;

      color: #414147;

      font-family: "Space Grotesk", sans-serif;

      font-size: 18px;
      letter-spacing: 16px;

      text-align: center;

      white-space: nowrap;

      user-select: none;
    }

    /* =========================
       SHOWCASE
    ========================= */

    .showcase {
      padding: 100px 0;
    }

    .showcase-box {
      min-height: 390px;

      position: relative;
      overflow: hidden;

      display: flex;
      align-items: center;

      padding: 55px;

      border: 1px solid var(--border);
      border-radius: 14px;

      background: #0f0f11;
    }

    .showcase-box::after {
      content: "";

      position: absolute;

      width: 430px;
      height: 430px;

      right: -150px;
      top: -180px;

      border-radius: 50%;

      background: radial-gradient(
        circle,
        rgba(139, 92, 246, 0.14),
        transparent 68%
      );
    }

    .showcase-content {
      max-width: 560px;

      position: relative;
      z-index: 1;
    }

    .showcase-label {
      margin-bottom: 14px;

      color: #8f8f95;

      font-size: 11px;
      font-weight: 600;

      letter-spacing: 0.08em;
      text-transform: uppercase;
    }

    .showcase h2 {
      margin-bottom: 14px;

      font-family: "Space Grotesk", sans-serif;

      font-size: clamp(35px, 5vw, 52px);
      font-weight: 600;

      line-height: 1.05;
      letter-spacing: -2.5px;
    }

    .showcase p {
      max-width: 500px;

      margin-bottom: 24px;

      color: var(--muted);

      font-size: 14px;
      line-height: 1.7;
    }

    /* =========================
       REVIEWS
    ========================= */

    .reviews {
      padding: 20px 0 110px;
    }

    .reviews-header {
      margin-bottom: 35px;
    }

    .reviews-header h2 {
      margin-bottom: 8px;

      font-family: "Space Grotesk", sans-serif;

      font-size: 31px;
      font-weight: 600;

      letter-spacing: -1.5px;
    }

    .reviews-header p {
      color: var(--muted);
      font-size: 14px;
    }

    .review-grid {
      display: grid;

      grid-template-columns: repeat(3, 1fr);

      gap: 12px;
    }

    .review-card {
      padding: 24px;

      border: 1px solid var(--border);
      border-radius: 12px;

      background: var(--surface);
    }

    .stars {
      margin-bottom: 20px;

      color: #b09cff;

      font-size: 13px;
      letter-spacing: 2px;
    }

    .review-text {
      min-height: 90px;

      margin-bottom: 20px;

      color: #c4c4c8;

      font-size: 13px;
      line-height: 1.7;
    }

    .review-person {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .avatar {
      width: 32px;
      height: 32px;

      display: grid;
      place-items: center;

      border-radius: 50%;

      background: #1d1d21;

      color: #aaaab0;

      font-size: 11px;
      font-weight: 600;
    }

    .person-name {
      color: #dedee1;

      font-size: 12px;
      font-weight: 600;
    }

    .person-role {
      margin-top: 2px;

      color: #68686e;

      font-size: 11px;
    }

    /* =========================
       CTA
    ========================= */

    .cta {
      padding: 100px 0;

      border-top: 1px solid #1c1c1f;
      border-bottom: 1px solid #1c1c1f;

      text-align: center;
    }

    .cta h2 {
      margin-bottom: 12px;

      font-family: "Space Grotesk", sans-serif;

      font-size: clamp(40px, 6vw, 60px);
      font-weight: 600;

      line-height: 1;
      letter-spacing: -3px;
    }

    .cta p {
      margin-bottom: 25px;

      color: var(--muted);

      font-size: 14px;
    }

    /* =========================
       FOOTER
    ========================= */

    footer {
      padding: 28px 0;

      color: #606066;

      font-size: 12px;
    }

    .footer-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    .footer-links {
      display: flex;
      gap: 18px;
    }

    .footer-links a:hover {
      color: #aaaab0;
    }

    /* =========================
       MOBILE
    ========================= */

    @media (max-width: 760px) {
      .container {
        width: min(100% - 28px, 1080px);
      }

      .nav-links {
        display: none;
      }

      .hero {
        min-height: 680px;

        padding: 140px 0 90px;
      }

      .hero h1 {
        letter-spacing: -3px;
      }

      .hero-description {
        font-size: 15px;
      }

      .hero-buttons {
        flex-direction: column;

        width: 100%;
        max-width: 300px;

        margin: 0 auto;
      }

      .button {
        width: 100%;
      }

      .math-1 {
        left: 2%;
        top: 18%;
      }

      .math-2 {
        right: 2%;
        top: 30%;
      }

      .math-3 {
        left: 4%;
      }

      .math-4 {
        right: 4%;
      }

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

      .feature-card {
        min-height: 190px;
      }

      .feature-number {
        margin-bottom: 35px;
      }

      .showcase {
        padding: 80px 0;
      }

      .showcase-box {
        padding: 35px 25px;
      }

      .footer-inner {
        flex-direction: column;
        gap: 15px;
      }
    }