input[type="file"] {
    height: 0;
    width: 0;
    visibility: hidden;
    position: absolute;
  }
  :root {
    --dark-bg: #06080d;
    --dark-panel: #0f1622;
    --dark-line: #243041;
    --dark-text: #e9eef8;
    --dark-muted: #9eabc1;
    --dark-accent: #ff5b5b;
  }

  .main-container {
    background: var(--dark-panel) !important;
    border: 1px solid var(--dark-line);
  }

  .main-container p,
  .main-container h1,
  .main-container h2,
  .main-container h3,
  .main-container h4,
  .main-container h5,
  .main-container h6,
  .main-container label {
    color: var(--dark-text);
  }

  .main-container .text-muted {
    color: var(--dark-muted) !important;
  }

  .custom-file-upload {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 90%;
    height: 260px;
    margin: 0 auto;
    cursor: pointer;
    color: #fff;
    border-radius: 4px;
    border: none;
    font-size: 16px;
    font-weight: bold;
    position: relative;
    cursor: pointer;
    border: 1px solid var(--dark-line);
    background: linear-gradient(135deg, #131d2c, #0d1420) !important;
  }

  
  .custom-file-upload img {
    position: absolute;
    top: 30%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 72px;
    height: 62px;
    margin-right: 10px;
    
  }
  .custom-file-upload label{
    margin-top: 10px;
  }
  .button-2 {
    background-color: var(--dark-accent);
    border-color: var(--dark-accent);
    color: #fff;
    transition: 0.2s;
  }
  
  .button-2:hover {
    background-color: var(--dark-accent);
    border-color: var(--dark-accent);
    color: #fff;
  }
  .button-2 {
    background-color: var(--dark-accent);
    border-color: var(--dark-accent);
    color: #fff;
  }
  .button-2:not(:disabled):not(:disabled):active {
    background-color: var(--dark-accent);
    border-color: var(--dark-accent);
    color: #fff;
 } 
  .custom-file-upload-color-1{
    background-color: #1a2538;
  }
  .custom-file-upload-color-2{
    background-color: #1a2538;
  }
  .custom-file-upload-color-3{
    background-color: #1a2538;
  }

  .button-3 {
    background-color: var(--dark-accent);
    border-color: var(--dark-accent);
    color: #fff;
  }
  .button-3:hover {
    background-color: var(--dark-accent);
    border-color: var(--dark-accent);
    color: #fff;
  }
  .button-3:not(:disabled):not(:disabled):active {
    background-color: var(--dark-accent);
    border-color: var(--dark-accent);
    color: #fff;
 } 
  .custom-file-upload label[for="pdfs"]::before {
    content: "";
    position: absolute;
    top: -15px;
    left: -15px;
    right: -15px;
    bottom: -15px;
    border: 1px dashed #3a465b;
    cursor: pointer;
  }
  .custom-file-upload label[for="pdf-input"]::before {
    content: "";
    position: absolute;
    top: -15px;
    left: -15px;
    right: -15px;
    bottom: -15px;
    border: 1px dashed #3a465b;
    cursor: pointer;
  }
  
  .fallback{
    margin: 0 auto;
  }
  .range-box{
    padding: 8px 20px;
    border: 1px solid var(--dark-line);
  padding-left: 15px;
  outline: none;
  border-radius: 5px;
  font-size: 17px;
  transition: all 0.3s;
  background: #0b111b;
  color: var(--dark-text);
  }
  .range-box:focus {
    border-color: var(--dark-accent);
    box-shadow: 0 0 0 0.2rem rgba(255, 91, 91, 0.2);
  }

  .common-btn,
  button[type="submit"],
  input[type="submit"] {
    background: linear-gradient(120deg, var(--dark-accent), #ff3b3b) !important;
    border: 1px solid #ff4f4f;
    color: #fff;
  }

  #pdf-list .list-group-item,
  .list-group-item {
    background: #0f1622;
    color: var(--dark-text);
    border-color: var(--dark-line);
  }

  @media (max-width: 768px) {
    .custom-file-upload {
      width: 100%;
      height: 220px;
      font-size: 14px;
    }

    .custom-file-upload img {
      width: 56px;
      height: 56px;
      top: 32%;
    }

    .custom-file-upload label[for="pdfs"]::before,
    .custom-file-upload label[for="pdf-input"]::before {
      top: -10px;
      left: -10px;
      right: -10px;
      bottom: -10px;
    }

    .range-box {
      width: 100%;
      font-size: 15px;
    }

    .btn-lg {
      width: 100%;
      padding-left: 1rem !important;
      padding-right: 1rem !important;
    }
  }

  /* Dashboard shell layout */
  .dashboard-shell {
    min-height: 100vh;
    display: flex;
    background: radial-gradient(circle at 8% 10%, #132036 0%, #070a10 45%, #04060a 100%);
  }

  .dashboard-sidebar {
    width: 280px;
    min-width: 280px;
    background: #0b111a;
    border-right: 1px solid #243041;
    padding: 22px 14px;
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    height: 100vh;
    overflow-y: auto;
    z-index: 1200;
  }

  .sidebar-brand-wrap {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 8px;
    margin-bottom: 14px;
  }

  .sidebar-brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: #e9eef8;
    font-size: 1.15rem;
    font-weight: 700;
  }

  .brand-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #ff5b5b;
    box-shadow: 0 0 14px rgba(255, 91, 91, 0.65);
  }

  .sidebar-caption {
    color: #9eabc1;
    font-size: 0.74rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin: 14px 10px 8px;
    font-weight: 700;
  }

  .sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: 4px;
  }

  .sidebar-link {
    color: #d8e2f1;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 9px 10px;
    border-radius: 9px;
    border: 1px solid transparent;
    transition: all 0.2s ease;
    font-size: 0.92rem;
  }

  .sidebar-link:hover {
    color: #fff;
    background: #162234;
    border-color: #2d3d55;
  }

  .sidebar-link i {
    width: 18px;
    text-align: center;
    color: #ff7d7d;
  }

  .sidebar-close {
    border: 1px solid #243041;
    background: #111b2a;
    color: #e9eef8;
    border-radius: 8px;
    width: 34px;
    height: 34px;
    display: none;
  }

  .dashboard-overlay {
    position: fixed;
    inset: 0;
    background: rgba(3, 6, 10, 0.7);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
    z-index: 1100;
  }

  .dashboard-content {
    flex: 1;
    min-width: 0;
    padding: 18px;
    margin-left: 280px;
    width: calc(100% - 280px);
  }

  .dashboard-topbar {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 18px;
    background: rgba(11, 17, 26, 0.88);
    border: 1px solid #243041;
    border-radius: 12px;
    margin-bottom: 18px;
  }

  .menu-toggle {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    border: 1px solid #243041;
    background: #111b2a;
    color: #e9eef8;
    display: none;
  }

  .topbar-title {
    margin: 0;
    color: #f3f6fc;
    font-size: 1.1rem;
    font-weight: 700;
  }

  .topbar-subtitle {
    margin: 2px 0 0;
    color: #9eabc1;
    font-size: 0.88rem;
  }

  .dashboard-content-inner {
    display: flex;
    flex-direction: column;
    gap: 18px;
  }

  .main-container {
    width: 100% !important;
    max-width: 1200px;
    margin: 0 auto;
    border-radius: 14px;
    padding: 8px 14px 18px;
  }

  .tool-section,
  .container-fluid,
  .footer {
    border-radius: 14px;
    overflow: hidden;
  }

  @media (max-width: 991px) {
    .menu-toggle,
    .sidebar-close {
      display: inline-flex;
      justify-content: center;
      align-items: center;
    }

    .dashboard-sidebar {
      position: fixed;
      left: -100%;
      top: 0;
      transition: left 0.25s ease;
    }

    .dashboard-sidebar.is-open {
      left: 0;
    }

    .dashboard-overlay.is-open {
      opacity: 1;
      pointer-events: auto;
    }

    .dashboard-content {
      padding: 10px;
      margin-left: 0;
      width: 100%;
    }

    .dashboard-topbar {
      margin-bottom: 10px;
    }
  }