:root {
      --ink: #F8FAFC;
      --ink-soft: #CBD5E1;
      --bg: #0D131F;
      --bg-card: #151D2C;
      --bg-header: rgba(13, 19, 31, 0.92);
      --bg-contrast: #1A2333;
      --text-contrast: #F8FAFC;
      --accent: #E29E4D;
      --accent-dark: #F5A952;
      --sage: #8BB28F;
      --muted: #94A3B8;
      --line: #222E42;
      --radius: 10px;
      --shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
    }

    :root.light-mode {
      --ink: #22314B;
      --ink-soft: #3C4B6B;
      --bg: #FAF6EF;
      --bg-card: #FFFFFF;
      --bg-header: rgba(250, 246, 239, 0.92);
      --bg-contrast: #22314B;
      --text-contrast: #FFFFFF;
      --accent: #D98E3B;
      --accent-dark: #B8721F;
      --sage: #7A9E7E;
      --muted: #6B6558;
      --line: #E4DCCB;
      --shadow: 0 4px 16px rgba(34, 49, 75, 0.08);
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      background: var(--bg);
      color: var(--ink);
      font-family: 'Inter', sans-serif;
      font-size: 16px;
      line-height: 1.55;
      -webkit-font-smoothing: antialiased;
    }

    h1,
    h2,
    h3,
    h4 {
      font-family: 'Space Grotesk', sans-serif;
      color: var(--ink);
      line-height: 1.15;
    }

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

    img {
      max-width: 100%;
      display: block;
    }

    .wrap {
      max-width: 1400px;
      margin: 0 auto;
      padding: 0 24px;
    }

    .stitch {
      border-top: 2px dashed var(--line);
    }

    section {
      padding: 72px 0;
    }

    .eyebrow {
      display: inline-block;
      font-size: 13px;
      font-weight: 600;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      color: var(--accent-dark);
      margin-bottom: 12px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 13px 26px;
      border-radius: 8px;
      font-weight: 600;
      font-size: 15px;
      cursor: pointer;
      border: 1.5px solid transparent;
      transition: transform 0.15s ease, box-shadow 0.15s ease;
    }

    .btn:hover {
      transform: translateY(-1px);
    }

    .btn-primary {
      background: var(--accent);
      color: #fff;
    }

    .btn-primary:hover {
      background: var(--accent-dark);
      box-shadow: 0 6px 18px rgba(217, 142, 59, 0.35);
    }

    .btn-outline {
      background: transparent;
      border-color: var(--ink);
      color: var(--ink);
    }

    .btn-outline:hover {
      background: var(--ink);
      color: var(--bg);
    }

    .btn-whatsapp {
      background: #25D366;
      color: #fff;
    }

    .btn-whatsapp:hover {
      background: #1EBE59;
      box-shadow: 0 6px 18px rgba(37, 211, 102, 0.35);
    }

    /* HEADER */
    header {
      position: sticky;
      top: 0;
      z-index: 50;
      background: var(--bg-header);
      backdrop-filter: blur(8px);
      border-bottom: 1px solid var(--line);
    }

    .nav {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 14px 20px;
      max-width: 1400px;
      margin: 0 auto;
      gap: 12px;
    }

    .logo {
      font-family: 'Space Grotesk', sans-serif;
      font-weight: 700;
      font-size: 22px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

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

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

    .nav-links a {
      font-weight: 500;
      font-size: 16px;
      color: var(--ink-soft);
    }

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

    .nav-cta {
      display: flex;
      gap: 12px;
      align-items: center;
    }

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 26px;
      cursor: pointer;
      color: var(--ink);
    }

    .theme-toggle-btn {
      background: none;
      border: 1.5px solid var(--line);
      border-radius: 50%;
      width: 40px;
      height: 40px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      color: var(--ink);
      transition: border-color 0.2s ease, transform 0.2s ease, background-color 0.2s ease;
      padding: 0;
    }

    .theme-toggle-btn:hover {
      border-color: var(--accent);
      transform: scale(1.05);
      background-color: rgba(255, 255, 255, 0.05);
    }

    .light-mode .theme-toggle-btn:hover {
      background-color: rgba(0, 0, 0, 0.03);
    }

    .theme-toggle-btn svg {
      width: 20px;
      height: 20px;
      fill: none;
      stroke: currentColor;
      stroke-width: 2;
      stroke-linecap: round;
      stroke-linejoin: round;
      transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

    .theme-toggle-btn:active svg {
      transform: scale(0.85);
    }

    .sun-icon {
      display: block;
    }

    .moon-icon {
      display: none;
    }

    .light-mode .sun-icon {
      display: none;
    }

    .light-mode .moon-icon {
      display: block;
    }

    /* HERO */
    .hero {
      padding: 80px 0 60px;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 56px;
      align-items: center;
    }

    .hero h1 {
      font-size: 64px;
      letter-spacing: -0.02em;
      margin-bottom: 20px;
    }

    .hero h1 em {
      font-style: normal;
      color: var(--accent-dark);
    }

    .hero p {
      font-size: 20px;
      color: var(--muted);
      max-width: 580px;
      margin-bottom: 30px;
    }

    .hero-ctas {
      display: flex;
      gap: 14px;
      flex-wrap: wrap;
      margin-bottom: 28px;
    }

    .hero-stats {
      display: flex;
      gap: 32px;
      padding-top: 24px;
      border-top: 1px dashed var(--line);
    }

    .hero-stats div strong {
      display: block;
      font-family: 'Space Grotesk', sans-serif;
      font-size: 28px;
    }

    .hero-stats div span {
      font-size: 15px;
      color: var(--muted);
    }

    .hero-visual {
      background: var(--bg-card);
      border: 1px solid var(--line);
      border-radius: 16px;
      padding: 0;
      position: relative;
      overflow: hidden;
      min-height: 360px;
      display: flex;
      align-items: stretch;
    }

    .hero-img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }

    .hero-visual:hover .hero-img {
      transform: scale(1.03);
    }

    /* TRUST STRIP */
    .trust {
      background: var(--bg-contrast);
      color: var(--text-contrast);
    }
    /* FOOTER */
    footer {
      background: var(--bg-contrast);
      color: #DCE2ED;
      padding: 56px 0 24px;
    }

    .foot-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr 1fr;
      gap: 36px;
      margin-bottom: 40px;
    }

    .foot-grid h4 {
      color: #fff;
      font-size: 14.5px;
      margin-bottom: 16px;
    }

    .foot-grid p,
    .foot-grid a {
      font-size: 13.5px;
      color: #AEB8CC;
      display: block;
      margin-bottom: 9px;
    }

    .foot-grid a:hover {
      color: var(--accent);
    }

    .foot-logo {
      font-family: 'Space Grotesk', sans-serif;
      font-weight: 700;
      font-size: 20px;
      color: #fff;
      margin-bottom: 12px;
    }

    .foot-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.12);
      padding-top: 20px;
      display: flex;
      justify-content: space-between;
      font-size: 12.5px;
      color: #8792A8;
      flex-wrap: wrap;
      gap: 8px;
    }

    /* FLOATING WHATSAPP */
    .float-wa {
      position: fixed;
      bottom: 24px;
      right: 24px;
      z-index: 60;
      background: #25D366;
      color: #fff;
      width: 56px;
      height: 56px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 26px;
      box-shadow: 0 6px 18px rgba(37, 211, 102, 0.4);
    }

    /* RESPONSIVE */
    @media (max-width: 900px) {
      .hero-grid {
        grid-template-columns: 1fr;
      }

      .hero-visual {
        order: -1;
        min-height: 220px;
      }

      .trust .wrap {
        grid-template-columns: repeat(2, 1fr);
      }

      .cat-grid {
        grid-template-columns: repeat(2, 1fr);
      }

      .calc {
        grid-template-columns: 1fr;
        padding: 28px;
      }

      .steps {
        grid-template-columns: repeat(2, 1fr);
        gap: 28px;
      }

      .step::before {
        display: none;
      }

      .why-grid {
        grid-template-columns: repeat(2, 1fr);
      }

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

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

    /* ── MOBILE (≤640px) ── */
    @media (max-width: 640px) {

      /* Nav — collapse links into hamburger */
      .nav {
        padding: 12px 16px;
        position: relative;
      }

      .nav-links {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--bg);
        border-bottom: 1px solid var(--line);
        flex-direction: column;
        padding: 16px 20px;
        gap: 16px;
        display: none;
        z-index: 100;
        box-shadow: 0 8px 24px rgba(0,0,0,0.15);
      }

      .nav-links.open {
        display: flex;
      }

      .nav-links a {
        font-size: 17px;
        padding: 6px 0;
        border-bottom: 1px solid var(--line);
        width: 100%;
      }

      .nav-links a:last-child {
        border-bottom: none;
      }

      /* Hide nav CTAs on mobile except theme toggle + hamburger */
      .menu-toggle {
        display: block;
        order: 3;
      }

      .nav-cta .btn-primary,
      .nav-cta .btn-whatsapp {
        display: none;
      }

      .nav-cta {
        gap: 8px;
      }

      /* Logo */
      .logo {
        font-size: 18px;
      }

      /* Hero */
      .hero {
        padding: 40px 0 32px;
      }

      .hero h1 {
        font-size: 30px;
        letter-spacing: -0.01em;
      }

      .hero p {
        font-size: 16px;
        margin-bottom: 20px;
      }

      .hero-ctas {
        flex-direction: column;
        gap: 10px;
      }

      .hero-ctas .btn {
        width: 100%;
        justify-content: center;
        padding: 14px 20px;
      }

      .hero-stats {
        flex-wrap: wrap;
        gap: 16px;
      }

      .hero-stats div {
        min-width: 80px;
      }

      .hero-stats div strong {
        font-size: 22px;
      }

      .hero-visual {
        min-height: 200px;
      }

      /* Trust strip */
      .trust .wrap {
        grid-template-columns: 1fr 1fr;
        padding: 20px 16px;
        gap: 12px;
      }

      .trust-item {
        font-size: 13px;
      }

      /* Sections */
      section {
        padding: 44px 0;
      }

      .wrap {
        padding: 0 16px;
      }

      .sec-head h2 {
        font-size: 28px;
      }

      .sec-head p {
        font-size: 15px;
      }

      /* Products grid */
      .cat-grid {
        grid-template-columns: 1fr;
        gap: 16px;
      }

      /* Steps */
      .steps {
        grid-template-columns: 1fr;
        gap: 24px;
      }

      .step {
        padding: 0;
        display: flex;
        gap: 16px;
        align-items: flex-start;
      }

      .step-num {
        flex-shrink: 0;
        margin-bottom: 0;
        width: 40px;
        height: 40px;
      }

      .step h4 {
        font-size: 17px;
        margin-top: 8px;
      }

      /* Why grid */
      .why-grid {
        grid-template-columns: 1fr;
        gap: 20px;
      }

      /* CTA banner */
      .cta-banner {
        padding: 28px 16px;
        border-radius: 12px;
      }

      .cta-banner h2 {
        font-size: 26px;
      }

      .cta-banner p {
        font-size: 15px;
      }

      .cta-banner .btn {
        width: 100%;
        justify-content: center;
      }

      /* Footer */
      .foot-grid {
        grid-template-columns: 1fr;
        gap: 24px;
      }

      footer {
        padding: 40px 0 20px;
      }

      .foot-bottom {
        flex-direction: column;
        align-items: center;
        text-align: center;
        gap: 6px;
      }

      /* Float WA button */
      .float-wa {
        bottom: 16px;
        right: 16px;
        width: 50px;
        height: 50px;
        font-size: 22px;
      }
    }

    /* ── VERY SMALL (≤380px) ── */
    @media (max-width: 380px) {
      .hero h1 {
        font-size: 26px;
      }

      .trust .wrap {
        grid-template-columns: 1fr;
      }

      .logo {
        font-size: 16px;
      }
    }

    :focus-visible {
      outline: 2.5px solid var(--accent-dark);
      outline-offset: 2px;
    }

    @media (prefers-reduced-motion: reduce) {
      * {
        transition: none !important;
      }
    }