body {
      margin: 0;
      font-family: 'Inter', Arial, sans-serif;
      background: #fff;
      color: #111;
    }
    .navbar {
      width: 100%;
      position: fixed;
      top: 0;
      left: 0;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 1.2rem 3vw;
      background: rgba(255,255,255,0.0);
      z-index: 100;
      box-sizing: border-box;
    }
    .navbar-logo {
      display: flex;
      align-items: center;
      gap: 0.7rem;
    }
    .navbar-logo img {
      height: 38px;
      width: 38px;
      object-fit: contain;
      border-radius: 8px;
      box-shadow: 0 2px 8px rgba(0,0,0,0.04);
    }
    .navbar-logo span {
      font-weight: 600;
      font-size: 1.25rem;
      letter-spacing: 0.02em;
      color: #111;
    }
    .navbar-items {
      display: flex;
      gap: 2.2rem;
    }
    .navbar-items a {
      text-decoration: none;
      color: #222;
      font-weight: 500;
      font-size: 1.05rem;
      transition: color 0.2s;
      position: relative;
    }
    .navbar-items a::after {
      content: '';
      display: block;
      width: 0;
      height: 2px;
      background: #111;
      transition: width 0.2s;
      position: absolute;
      left: 0;
      bottom: -4px;
    }
    .navbar-items a:hover {
      color: #111;
    }
    .navbar-items a:hover::after {
      width: 100%;
    }
    .navbar-hamburger {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 0.4rem 0.6rem;
      border-radius: 6px;
      transition: background 0.2s;
      color: #fff;
    }
    .navbar-hamburger:focus,
    .navbar-hamburger:hover {
      background: #e5e5e5;
      color: #555;
    }
    .navbar-hamburger span {
      display: block;
      width: 26px;
      height: 3px;
      margin: 5px 0;
      background: #fff;
      border-radius: 2px;
      transition: all 0.3s;
    }
    .sidebar {
      position: fixed;
      top: 0;
      right: -270px;
      width: 250px;
      height: 100vh;
      background: #fff;
      box-shadow: -2px 0 18px rgba(0,0,0,0.08);
      z-index: 200;
      display: flex;
      flex-direction: column;
      padding: 2.2rem 1.5rem 1.5rem 1.5rem;
      transition: right 0.3s cubic-bezier(.4,0,.2,1), opacity 0.3s cubic-bezier(.4,0,.2,1);
      pointer-events: none;
      opacity: 0;
    }
    .sidebar.open {
      right: 0;
      pointer-events: auto;
      opacity: 1;
    }
    .sidebar.closing {
      right: -270px;
      opacity: 0;
      pointer-events: none;
    }
    .sidebar-close {
      align-self: flex-end;
      background: none;
      border: none;
      font-size: 1.7rem;
      cursor: pointer;
      margin-bottom: 1.5rem;
      color: #222;
      transition: color 0.2s;
    }
    .sidebar-close:hover {
      color: #111;
    }
    .sidebar a {
      text-decoration: none;
      color: #222;
      font-weight: 500;
      font-size: 1.1rem;
      margin-bottom: 1.2rem;
      transition: color 0.2s, background 0.2s;
      display: block;
      border-radius: 5px;
      padding: 0.5rem 0.7rem;
    }
    .sidebar a:last-child {
      margin-bottom: 0;
    }
    .sidebar a:hover {
      color: #111;
      background: #f3f4f6;
    }
    .sidebar-backdrop {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      width: 100vw;
      height: 100vh;
      background: rgba(0,0,0,0.13);
      z-index: 150;
      transition: opacity 0.2s;
    }
    .sidebar-backdrop.open {
      display: block;
    }
    .tools-container {
      max-width: 1100px;
      margin: 0 auto;
      padding: 6.5rem 2vw 3rem 2vw;
      display: flex;
      flex-direction: column;
      align-items: center;
    }
    .tools-title {
      font-size: 2.3rem;
      font-weight: 700;
      margin-bottom: 1.5rem;
      letter-spacing: -0.01em;
      color: #111;
      text-align: center;
    }
    .tools-search {
      width: 100%;
      max-width: 420px;
      margin-bottom: 2.5rem;
      display: flex;
      align-items: center;
      background: #fafbfc;
      border: 1.5px solid #e5e7eb;
      border-radius: 8px;
      padding: 0.5rem 1rem;
      box-sizing: border-box;
      transition: border 0.2s;
    }
    .tools-search:focus-within {
      border: 1.5px solid #111;
    }
    .tools-search input {
      border: none;
      outline: none;
      background: transparent;
      font-size: 1.08rem;
      color: #111;
      width: 100%;
      padding: 0.4rem 0;
    }
    .tools-list {
      width: 100%;
      display: grid;
      grid-template-columns: repeat(1, 1fr);
      gap: 2.2rem;
      margin-top: 0.5rem;
      transition: grid-template-columns 0.2s;
    }
    @media (min-width: 600px) {
      .tools-list {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    @media (min-width: 900px) {
      .tools-list {
        grid-template-columns: repeat(3, 1fr);
      }
    }
    .tool-card {
      background: #fff;
      border-radius: 14px;
      box-shadow: 0 2px 12px rgba(0,0,0,0.04);
      padding: 2.1rem 1.3rem 1.5rem 1.3rem;
      display: flex;
      flex-direction: column;
      align-items: flex-start;
      min-height: 120px;
      transition: box-shadow 0.2s, transform 0.2s, border 0.2s;
      gap: 0.7rem;
      border: 1.5px solid #f3f4f6;
      text-decoration: none;
      cursor: pointer;
    }
    .tool-card:hover {
      box-shadow: 0 6px 24px rgba(0,0,0,0.09);
      transform: translateY(-2px) scale(1.02);
      border: 1.5px solid #111;
    }
    .tool-card:visited, .tool-card:active, .tool-card:focus {
      text-decoration: none;
      color: inherit;
    }
    .tool-icon {
      width: 38px;
      height: 38px;
      margin-bottom: 0.7rem;
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
      background: #f3f4f6;
      border-radius: 8px;
    }
    .tool-title {
      font-size: 1.18rem;
      font-weight: 600;
      margin: 0 0 0.7rem 0;
      color: #222;
    }
    .tool-desc {
      font-size: 1.04rem;
      color: #444;
      margin: 0;
      line-height: 1.6;
    }
    @media (max-width: 700px) {
      .navbar {
        flex-direction: row;
        align-items: center;
        padding: 0.7rem 2vw;
        background: #111;
      }
      .navbar-logo span {
        color: #fff;
      }
      .navbar-items {
        display: none;
      }
      .navbar-hamburger {
        display: block;
        background: none !important;
      }
      .navbar-hamburger:focus,
      .navbar-hamburger:hover {
        background: none !important;
      }
      .navbar-hamburger span {
        background: #fff;
        transition: background 0.2s;
      }
      .navbar-hamburger:hover span,
      .navbar-hamburger:focus span {
        background: #444;
      }
      .tools-title {
        font-size: 1.3rem;
        margin-bottom: 1.1rem;
      }
      .tools-search {
        max-width: 98vw;
        margin-bottom: 1.3rem;
      }
      .tools-list {
        gap: 1.1rem;
      }
      .tool-card {
        padding: 1.2rem 1rem 1.1rem 1rem;
        min-height: 100px;
      }
      .tool-icon {
        width: 28px;
        height: 28px;
        margin-bottom: 0.7rem;
      }
      .tool-title {
        font-size: 1.01rem;
      }
      .tool-desc {
        font-size: 0.97rem;
      }
    }
    /* Sticky footer fix */
    html, body {
      height: 100%;
    }
    body {
      display: flex;
      flex-direction: column;
      min-height: 100vh;
    }
    .tools-container {
      flex: 1 0 auto;
    }
    footer {
      flex-shrink: 0;
    }