:root {
      --bg-0: #0b0d12;
      --bg-1: #111622;
      --bg-2: #151b2b;
      --line: rgba(255, 255, 255, 0.08);
      --text: #eef2f6;
      --muted: #97a3b6;
      --accent: #4cc9f0;
      --accent-2: #5eead4;
      --btn-hover-bg: #ffffff;
      --btn-hover-color: #000000;
      --btn-hover-border: #ffffff;
      --btn-active-bg: #e5e7eb;
      --btn-active-color: #000000;
      --btn-active-border: #e5e7eb;
    }
    html[data-theme='light'] {
      --bg-0: #f5f7fb;
      --bg-1: #eef2f7;
      --bg-2: #e6ecf5;
      --line: rgba(15, 23, 42, 0.12);
      --text: #0f172a;
      --muted: #475569;
      --accent: #0ea5e9;
      --accent-2: #14b8a6;
      --btn-hover-bg: #0f172a;
      --btn-hover-color: #ffffff;
      --btn-hover-border: #0f172a;
      --btn-active-bg: #111827;
      --btn-active-color: #ffffff;
      --btn-active-border: #111827;
    }
    body {
      font-family: "IBM Plex Sans", "Space Grotesk", sans-serif;
      color: var(--text);
      background:
        radial-gradient(900px 520px at 15% -10%, rgba(76, 201, 240, 0.22), transparent 65%),
        radial-gradient(860px 540px at 90% 0%, rgba(94, 234, 212, 0.18), transparent 60%),
        linear-gradient(180deg, var(--bg-0) 0%, #0f1420 100%);
      min-height: 100vh;
    }
    html[data-theme='light'] body {
      background:
        radial-gradient(900px 520px at 15% -10%, rgba(148, 163, 184, 0.22), transparent 65%),
        radial-gradient(860px 540px at 90% 0%, rgba(100, 116, 139, 0.18), transparent 60%),
        linear-gradient(180deg, var(--bg-0) 0%, #f8fafc 100%);
    }
    .bg-grid {
      position: fixed;
      inset: 0;
      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: 80px 80px;
      mask-image: radial-gradient(circle at 50% 0%, rgba(0, 0, 0, 0.65), transparent 65%);
      opacity: 0.4;
      pointer-events: none;
      z-index: 0;
    }
    html[data-theme='light'] .bg-grid {
      background-image: linear-gradient(rgba(15, 23, 42, 0.06) 1px, transparent 1px),
                        linear-gradient(90deg, rgba(15, 23, 42, 0.06) 1px, transparent 1px);
      opacity: 0.25;
      mask-image: radial-gradient(circle at 50% 0%, rgba(255, 255, 255, 0.8), transparent 65%);
    }
    main {
      position: relative;
      z-index: 1;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
      padding: 0.35rem 0.75rem;
      border-radius: 999px;
      border: 1px solid var(--line);
      background: rgba(17, 22, 34, 0.7);
      font-size: 0.85rem;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      color: var(--muted);
    }
    html[data-theme='light'] .hero-badge {
      background: rgba(255, 255, 255, 0.8);
    }
    .login-panel {
      display: flex;
      justify-content: center;
    }
    .login-card {
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 0.85rem;
      padding: 1.5rem 2rem;
      border-radius: 18px;
      border: 1px solid var(--line);
      background: rgba(17, 22, 34, 0.92);
      box-shadow: 0 16px 32px rgba(0, 0, 0, 0.35);
      max-width: 420px;
      width: 100%;
    }
    .login-card-alt {
      align-items: stretch;
      text-align: left;
    }
    .test-mode-form {
      display: flex;
      flex-direction: column;
      gap: 0.75rem;
      width: 100%;
    }
    .test-mode-field .form-control {
      background: rgba(255, 255, 255, 0.04);
      border-color: var(--line);
      color: var(--text);
    }
    html[data-theme='light'] .test-mode-field .form-control {
      background: rgba(15, 23, 42, 0.04);
      border-color: rgba(15, 23, 42, 0.2);
      color: #0f172a;
    }
    html[data-theme='light'] .login-card {
      background: rgba(255, 255, 255, 0.92);
      box-shadow: 0 16px 32px rgba(15, 23, 42, 0.08);
    }
    .login-title {
      font-family: "Space Grotesk", sans-serif;
      font-size: 1.1rem;
      font-weight: 600;
      color: var(--text);
    }
    .login-subtitle {
      color: var(--muted);
      font-size: 0.95rem;
    }
    .login-google-btn {
      display: inline-flex;
      align-items: center;
      gap: 0.6rem;
      padding: 0.55rem 1.1rem;
      border-radius: 999px;
      border: 1px solid var(--line);
      background: rgba(255, 255, 255, 0.06);
      color: var(--text);
      font-weight: 600;
      text-decoration: none;
      transition: transform 0.15s ease, box-shadow 0.15s ease;
    }
    .login-google-btn:hover {
      transform: translateY(-1px);
      box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
    }
    html[data-theme='light'] .login-google-btn {
      background: rgba(15, 23, 42, 0.04);
    }
    .display-5 {
      font-family: "Space Grotesk", sans-serif;
    }
    .tool-card {
      position: relative;
      padding: 1.75rem;
      border-radius: 1.25rem;
      border: 1px solid var(--line);
      background: rgba(17, 22, 34, 0.92);
      box-shadow: 0 18px 40px rgba(0, 0, 0, 0.35);
      overflow: hidden;
      opacity: 0;
      transform: translateY(18px);
      animation: fadeUp 0.7s ease forwards;
    }
    html[data-theme='light'] .tool-card {
      background: rgba(255, 255, 255, 0.92);
      box-shadow: 0 18px 40px rgba(15, 23, 42, 0.08);
    }
    .tool-card::before {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(120deg, rgba(76, 201, 240, 0.12), transparent 55%);
      opacity: 0;
      transition: opacity 0.3s ease;
      pointer-events: none;
      z-index: 0;
    }
    .tool-card > * {
      position: relative;
      z-index: 1;
    }
    .tool-card:hover::before {
      opacity: 1;
    }
    html[data-theme='light'] .tool-card::before {
      background: linear-gradient(120deg, rgba(148, 163, 184, 0.18), transparent 55%);
    }
    .tool-card:hover {
      transform: translateY(10px);
    }
    .tool-icon {
      width: 48px;
      height: 48px;
      border-radius: 16px;
      display: grid;
      place-items: center;
      background: transparent;
      border: 1px solid #fff;
      color: #fff;
    }
    html[data-theme='light'] .tool-icon {
      background: transparent;
      border-color: #000;
      color: #000;
    }
    .tool-card h2 {
      font-family: "Space Grotesk", sans-serif;
    }
    .btn-primary {
      background: linear-gradient(135deg, #4cc9f0, #4895ef);
      border: none;
    }
    .btn-primary:hover {
      filter: brightness(1.05);
    }
    .btn:not(:disabled):not(.disabled):hover,
    .btn:not(:disabled):not(.disabled):focus-visible {
      background: var(--btn-hover-bg);
      color: var(--btn-hover-color);
      border-color: var(--btn-hover-border);
    }
    .btn:not(:disabled):not(.disabled):active,
    .btn:not(:disabled):not(.disabled).active {
      background: var(--btn-active-bg);
      color: var(--btn-active-color);
      border-color: var(--btn-active-border);
    }
    .btn-outline-info {
      --bs-btn-color: #fff;
      --bs-btn-border-color: #fff;
      --bs-btn-hover-color: #fff;
      --bs-btn-hover-bg: transparent;
      --bs-btn-hover-border-color: #fff;
      --bs-btn-focus-shadow-rgb: 255, 255, 255;
      --bs-btn-active-color: #fff;
      --bs-btn-active-bg: transparent;
      --bs-btn-active-border-color: #fff;
    }
    html[data-theme='light'] .btn-outline-info {
      --bs-btn-color: #000;
      --bs-btn-border-color: #000;
      --bs-btn-hover-color: #000;
      --bs-btn-hover-bg: transparent;
      --bs-btn-hover-border-color: #000;
      --bs-btn-focus-shadow-rgb: 0, 0, 0;
      --bs-btn-active-color: #000;
      --bs-btn-active-bg: transparent;
      --bs-btn-active-border-color: #000;
    }
    .tool-meta {
      color: var(--muted);
      font-size: 0.95rem;
    }
    .auth-launch {
      position: absolute;
      top: 1.25rem;
      right: 1.25rem;
      z-index: 2;
      display: flex;
      align-items: center;
      gap: 0.5rem;
    }
    .auth-button {
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
      border-radius: 999px;
      padding: 0.35rem 0.85rem;
      border: 1px solid var(--line);
      background: rgba(15, 20, 32, 0.7);
      color: var(--text);
      font-size: 0.9rem;
      font-weight: 600;
    }
    html[data-theme='light'] .auth-button {
      background: rgba(255, 255, 255, 0.8);
      color: var(--text);
    }
    .auth-button svg {
      width: 18px;
      height: 18px;
      fill: currentColor;
    }
    .auth-button:hover {
      border-color: rgba(255, 255, 255, 0.25);
      color: #fff;
    }
    .auth-dropdown {
      position: relative;
    }
    .auth-dropdown-toggle {
      cursor: pointer;
    }
    .auth-caret {
      width: 14px;
      height: 14px;
      opacity: 0.75;
    }
    .auth-dropdown-menu {
      position: absolute;
      top: 100%;
      right: 0;
      margin-top: 0.25rem;
      min-width: 200px;
      padding: 0.35rem;
      border-radius: 14px;
      border: 1px solid var(--line);
      background: rgba(17, 22, 34, 0.98);
      box-shadow: 0 16px 32px rgba(0, 0, 0, 0.35);
      opacity: 0;
      transform: translateY(6px);
      pointer-events: none;
      transition: opacity 0.15s ease, transform 0.15s ease;
      z-index: 3;
    }
    .auth-dropdown-menu::before {
      content: "";
      position: absolute;
      top: -8px;
      left: 0;
      right: 0;
      height: 8px;
    }
    html[data-theme='light'] .auth-dropdown-menu {
      background: #ffffff;
      box-shadow: 0 16px 32px rgba(15, 23, 42, 0.12);
    }
    .auth-dropdown:hover .auth-dropdown-menu {
      opacity: 1;
      transform: translateY(0);
      pointer-events: auto;
    }
    .auth-dropdown-item {
      display: flex;
      align-items: center;
      width: 100%;
      padding: 0.5rem 0.75rem;
      border-radius: 10px;
      border: none;
      background: transparent;
      color: var(--text);
      font-size: 0.9rem;
      font-weight: 500;
      text-decoration: none;
      text-align: left;
      cursor: pointer;
    }
    .auth-dropdown-item-static {
      padding: 0;
    }
    .auth-dropdown-item.auth-dropdown-item-static:hover,
    .auth-dropdown-item.auth-dropdown-item-static:focus-visible {
      background: transparent;
      color: inherit;
    }
    .auth-dropdown-menu .theme-toggle {
      width: 100%;
      justify-content: space-between;
    }
    .auth-dropdown-item:hover,
    .auth-dropdown-item:focus-visible {
      background: rgba(255, 255, 255, 0.08);
      color: #fff;
    }
    html[data-theme='light'] .auth-dropdown-item:hover,
    html[data-theme='light'] .auth-dropdown-item:focus-visible {
      background: rgba(15, 23, 42, 0.08);
      color: #0f172a;
    }
    .auth-modal .modal-card {
      width: min(520px, 100%);
    }
    html[data-theme='light'] .modal-card {
      background: #ffffff;
      border-color: rgba(15, 23, 42, 0.12);
      box-shadow: 0 20px 40px rgba(15, 23, 42, 0.12);
      color: var(--text);
    }
    html[data-theme='light'] .modal-card .btn-outline-light {
      --bs-btn-color: #0f172a;
      --bs-btn-border-color: #0f172a;
      --bs-btn-hover-color: #ffffff;
      --bs-btn-hover-bg: #0f172a;
      --bs-btn-hover-border-color: #0f172a;
      --bs-btn-active-color: #ffffff;
      --bs-btn-active-bg: #111827;
      --bs-btn-active-border-color: #111827;
    }
    html[data-theme='light'] .modal-overlay {
      background: rgba(15, 23, 42, 0.35);
    }
    .auth-view {
      display: none;
    }
    .auth-view.active {
      display: block;
    }
    .auth-separator {
      display: flex;
      align-items: center;
      gap: 0.75rem;
      color: var(--muted);
      font-size: 0.85rem;
    }
    .auth-separator::before,
    .auth-separator::after {
      content: "";
      flex: 1;
      height: 1px;
      background: var(--line);
    }
    .auth-link {
      color: var(--accent-2);
      text-decoration: none;
      cursor: pointer;
    }
    .auth-link:hover {
      color: #9ff3e5;
    }
    @keyframes fadeUp {
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }
    @media (prefers-reduced-motion: reduce) {
      .tool-card {
        animation: none;
        opacity: 1;
        transform: none;
      }
      .tool-card:hover {
        transform: none;
      }
    }
    .modal-overlay {
      position: fixed;
      inset: 0;
      background: rgba(0, 0, 0, 0.65);
      display: none;
      align-items: center;
      justify-content: center;
      padding: 1.5rem;
      z-index: 1050;
    }
    .modal-card {
      width: min(720px, 100%);
      background: #111;
      border: 1px solid #343a40;
      border-radius: 16px;
      padding: 1.5rem;
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
    }
    .drop-zone {
      border: 2px dashed #6c757d;
      border-radius: 16px;
      padding: 2.5rem;
      text-align: center;
      background: rgba(255, 255, 255, 0.03);
      transition: border-color 0.15s ease, background 0.15s ease;
      cursor: pointer;
      width: 100%;
      display: block;
    }
    html[data-theme='light'] .drop-zone {
      border-color: rgba(15, 23, 42, 0.2);
      background: rgba(15, 23, 42, 0.02);
    }
    .drop-zone.dragover {
      border-color: #0dcaf0;
      background: rgba(13, 202, 240, 0.1);
    }
    .drop-zone.has-file {
      border-color: #198754;
      background: rgba(25, 135, 84, 0.1);
    }
    .drop-zone input[type="file"] {
      display: none;
    }
    .log-box {
      background: #0d0f14;
      border: 1px solid #2b3036;
      border-radius: 12px;
      padding: 0.75rem;
      height: 220px;
      overflow-y: auto;
      font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
      font-size: 0.85rem;
      white-space: pre-wrap;
    }
    html[data-theme='light'] .log-box {
      background: #f8fafc;
      border-color: rgba(15, 23, 42, 0.12);
      color: #0f172a;
    }
    .progress-bar-animated {
      animation: progress-stripes 1s linear infinite;
    }
    @keyframes progress-stripes {
      0% { background-position-x: 1rem; }
      100% { background-position-x: 0; }
    }
    .spinner-ring {
      width: 64px;
      height: 64px;
      border-radius: 50%;
      border: 4px solid rgba(255, 255, 255, 0.15);
      border-top-color: #4cc9f0;
      animation: spin 0.8s linear infinite;
      margin: 0 auto 1rem;
    }
    @keyframes spin {
      to { transform: rotate(360deg); }
    }
    .h5p-type-columns {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 1rem;
      margin-top: 0.5rem;
    }
    .h5p-type-column {
      display: flex;
      flex-direction: column;
      gap: 0.5rem;
    }
    .h5p-type-column-title {
      font-size: 0.75rem;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      color: #97a3b6;
    }
    .h5p-type-item {
      display: flex;
      align-items: center;
      gap: 0.5rem;
      width: 100%;
    }
    .h5p-type-item-select {
      gap: 0.75rem;
      justify-content: space-between;
    }
    .h5p-type-item-select .form-label {
      flex: 1;
    }
    .h5p-type-count {
      width: 4.5rem;
      flex: 0 0 auto;
    }
    .h5p-type-item .form-check-input {
      margin-left: 0;
      margin-top: 0;
    }
    @media (max-width: 576px) {
      .h5p-type-columns {
        grid-template-columns: 1fr;
      }
    }