:root {
      --bg: #ffffff;
      --panel: rgba(255, 255, 255, 0.96);
      --panel-strong: #ffffff;
      --line: rgba(15, 23, 42, 0.08);
      --text: #1f2937;
      --muted: #6b7280;
      --accent-soft: #f8fafc;
      --success: #166534;
      --danger: #b42318;
      --shadow: 0 18px 40px rgba(15, 23, 42, 0.06);
    }

    * { box-sizing: border-box; }

    body {
      margin: 0;
      min-height: 100vh;
      font-family: "Segoe UI", Helvetica, Arial, sans-serif;
      color: var(--text);
      background:
        radial-gradient(circle at top left, rgba(15, 23, 42, 0.04), transparent 28%),
        radial-gradient(circle at right 18%, rgba(15, 23, 42, 0.03), transparent 24%),
        linear-gradient(180deg, #ffffff 0%, var(--bg) 46%, #fbfbfc 100%);
    }

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


    html[data-costing-theme='light'] body {
      --bg: #ffffff;
      --panel: rgba(255, 255, 255, 0.96);
      --panel-strong: #ffffff;
      --line: rgba(15, 23, 42, 0.08);
      --text: #1f2937;
      --muted: #6b7280;
      --accent-soft: #f8fafc;
      --success: #166534;
      --danger: #b42318;
      --shadow: 0 18px 40px rgba(15, 23, 42, 0.06);
      background: linear-gradient(180deg, #ffffff 0%, #fbfbfc 100%);
    }

    html[data-costing-theme='light'] .topbar,
    html[data-costing-theme='light'] .intro-panel,
    html[data-costing-theme='light'] .login-card,
    html[data-costing-theme='light'] .workspace,
    html[data-costing-theme='light'] .migration-panel,
    html[data-costing-theme='light'] .credential-gate-panel {
      background: var(--panel) !important;
      border-color: var(--line) !important;
      box-shadow: var(--shadow) !important;
      color: var(--text) !important;
    }

    html[data-costing-theme='light'] .topbar {
      background: rgba(255, 255, 255, 0.92) !important;
    }

    html[data-costing-theme='light'] .login-card,
    html[data-costing-theme='light'] .group-card {
      background: linear-gradient(180deg, rgba(20, 35, 63, 0.03), rgba(20, 35, 63, 0.015)), var(--panel-strong) !important;
    }

    html[data-costing-theme='light'] .intro-point,
    html[data-costing-theme='light'] .intro-link-card,
    html[data-costing-theme='light'] .role-card,
    html[data-costing-theme='light'] .group-card,
    html[data-costing-theme='light'] .passkey-summary,
    html[data-costing-theme='light'] .passkey-item,
    html[data-costing-theme='light'] .link-pill,
    html[data-costing-theme='light'] .ghost,
    html[data-costing-theme='light'] .field input,
    html[data-costing-theme='light'] .migration-table th,
    html[data-costing-theme='light'] .migration-table td {
      border-color: var(--line) !important;
    }

    html[data-costing-theme='light'] .intro-point,
    html[data-costing-theme='light'] .intro-link-card,
    html[data-costing-theme='light'] .role-card,
    html[data-costing-theme='light'] .passkey-summary,
    html[data-costing-theme='light'] .passkey-item {
      background: rgba(20, 35, 63, 0.03) !important;
      color: var(--text) !important;
    }

    html[data-costing-theme='light'] .kicker {
      background: rgba(20, 35, 63, 0.03) !important;
      color: var(--muted) !important;
      border-color: var(--line) !important;
    }

    html[data-costing-theme='light'] .field input {
      background: rgba(255, 255, 255, 0.92) !important;
      color: var(--text) !important;
    }

    html[data-costing-theme='light'] .button,
    html[data-costing-theme='light'] .ghost,
    html[data-costing-theme='light'] .link-pill {
      background: #ffffff !important;
      color: #1f2937 !important;
      border-color: rgba(15, 23, 42, 0.14) !important;
      box-shadow: none !important;
    }

    html[data-costing-theme='light'] .button:hover,
    html[data-costing-theme='light'] .ghost:hover,
    html[data-costing-theme='light'] .link-pill:hover {
      background: #f8fafc !important;
      color: #1f2937 !important;
      border-color: rgba(15, 23, 42, 0.18) !important;
    }

    html[data-costing-theme='dark'] .button,
    html[data-costing-theme='dark'] .ghost,
    html[data-costing-theme='dark'] .link-pill {
      background: #ffffff !important;
      color: #1f2937 !important;
      border-color: rgba(15, 23, 42, 0.14) !important;
      box-shadow: none !important;
    }

    html[data-costing-theme='dark'] .button:hover,
    html[data-costing-theme='dark'] .ghost:hover,
    html[data-costing-theme='dark'] .link-pill:hover {
      background: #f8fafc !important;
      color: #1f2937 !important;
      border-color: rgba(15, 23, 42, 0.18) !important;
    }

    html[data-costing-theme='light'] .brand-copy small,
    html[data-costing-theme='light'] .field label,
    html[data-costing-theme='light'] .group-meta,
    html[data-costing-theme='light'] .passkey-copy,
    html[data-costing-theme='light'] .passkey-meta,
    html[data-costing-theme='light'] p,
    html[data-costing-theme='light'] .session-user,
    html[data-costing-theme='light'] .role-card-meta {
      color: var(--muted) !important;
    }

    html[data-costing-theme='light'] .intro-point strong,
    html[data-costing-theme='light'] .intro-link-card strong,
    html[data-costing-theme='light'] .role-card h3,
    html[data-costing-theme='light'] .passkey-item strong,
    html[data-costing-theme='light'] h1,
    html[data-costing-theme='light'] h2,
    html[data-costing-theme='light'] h3 {
      color: var(--text) !important;
    }

    .shell {
      width: min(1180px, calc(100% - 32px));
      margin: 0 auto;
      padding: 28px 0 48px;
    }

    .topbar,
    .intro-panel,
    .login-card,
    .workspace {
      border: 1px solid var(--line);
      border-radius: 32px;
      background: var(--panel);
      box-shadow: var(--shadow);
    }

    .topbar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
      padding: 16px 20px;
      background: rgba(8, 8, 8, 0.78);
      backdrop-filter: blur(18px);
    }

    .brand {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .brand-mark {
      display: block;
      width: clamp(180px, 24vw, 260px);
      height: auto;
      flex: 0 0 auto;
      border-radius: 18px;
      box-shadow: 0 18px 35px rgba(0, 0, 0, 0.28);
    }

    .brand-copy {
      display: grid;
      gap: 6px;
    }

    .brand-copy strong {
      display: block;
      font-size: 1.15rem;
      font-weight: 600;
      letter-spacing: 0.08em;
    }

    .brand-copy small,
    .kicker,
    .field label,
    .status,
    .group-meta,
    .link-pill {
      letter-spacing: 0.16em;
      text-transform: uppercase;
    }

    .brand-copy small,
    .field label,
    .group-meta {
      color: var(--muted);
      font-size: 0.72rem;
    }

    .hero {
      display: grid;
      grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr);
      gap: 28px;
      margin-top: 28px;
    }

    .intro-panel,
    .login-card,
    .workspace {
      padding: 32px;
    }

    .intro-panel {
      position: relative;
      overflow: hidden;
    }

    .intro-panel::before {
      content: "";
      position: absolute;
      inset: auto -10% -35% 35%;
      height: 320px;
      background: radial-gradient(circle, var(--accent-soft), transparent 62%);
      pointer-events: none;
    }

    .kicker {
      display: inline-flex;
      align-items: center;
      width: fit-content;
      gap: 10px;
      padding: 8px 12px;
      border-radius: 999px;
      border: 1px solid var(--line);
      background: rgba(255, 255, 255, 0.03);
      color: var(--muted);
      font-size: 0.75rem;
    }

    h1, h2, h3 {
      margin: 0;
      font-weight: 600;
      letter-spacing: -0.04em;
    }

    h1 {
      margin: 22px 0 18px;
      font-size: clamp(3rem, 7vw, 4.8rem);
      line-height: 0.96;
    }

    h2 {
      margin: 8px 0 12px;
      font-size: 1.85rem;
    }

    p {
      margin: 0;
      color: var(--muted);
      line-height: 1.7;
    }

    .intro-points {
      display: grid;
      gap: 14px;
      margin-top: 28px;
    }

    .intro-point {
      padding: 18px 20px;
      border-radius: 22px;
      border: 1px solid var(--line);
      background: rgba(255, 255, 255, 0.03);
    }

    .intro-point strong {
      display: block;
      margin-bottom: 8px;
      color: var(--text);
      font-size: 1rem;
    }

    .intro-link-card {
      display: grid;
      gap: 18px;
      margin-top: 28px;
      padding: 24px;
      border-radius: 24px;
      border: 1px solid var(--line);
      background: rgba(255, 255, 255, 0.03);
    }

    .intro-link-card strong {
      display: block;
      color: var(--text);
      font-size: 1.1rem;
      letter-spacing: -0.02em;
    }

    .intro-link-copy {
      display: grid;
      gap: 10px;
    }

    .intro-link-button {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: fit-content;
      padding: 14px 18px;
      border-radius: 999px;
      border: 1px solid rgba(255, 255, 255, 0.16);
      background: rgba(255, 255, 255, 0.06);
      color: var(--text);
      font-weight: 600;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      transition: transform 0.16s ease, background 0.16s ease, border-color 0.16s ease;
    }

    .intro-link-button:hover {
      transform: translateY(-1px);
      background: rgba(255, 255, 255, 0.1);
      border-color: rgba(255, 255, 255, 0.24);
    }

    .login-card {
      display: flex;
      flex-direction: column;
      gap: 24px;
      background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.02)),
        var(--panel-strong);
    }

    .login-form {
      display: grid;
      gap: 14px;
    }

    .login-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
    }

    .login-actions .button,
    .login-actions .ghost {
      flex: 1 1 220px;
    }

    .field {
      display: grid;
      gap: 8px;
    }

    .field input {
      width: 100%;
      border: 1px solid var(--line);
      border-radius: 16px;
      background: rgba(255, 255, 255, 0.04);
      color: var(--text);
      padding: 16px 18px;
      font: inherit;
      outline: none;
    }

    .button,
    .ghost {
      border-radius: 999px;
      padding: 14px 18px;
      font: inherit;
      cursor: pointer;
    }

    .button {
      border: 0;
      background: linear-gradient(135deg, #d1c2ff, #89ebc0);
      color: #111;
      font-weight: 600;
      box-shadow: 0 16px 30px rgba(137, 235, 192, 0.2);
    }

    .ghost {
      border: 1px solid var(--line);
      background: transparent;
      color: var(--text);
    }

    .status {
      min-height: 1.1rem;
      font-size: 0.72rem;
      color: var(--danger);
    }

    .status.success {
      color: var(--success);
    }

    .passkey-copy,
    .passkey-meta {
      color: var(--muted);
      line-height: 1.6;
      font-size: 0.95rem;
    }

    .workspace {
      display: none;
      margin-top: 28px;
    }

    .workspace.active {
      display: block;
    }

    .workspace-head {
      display: flex;
      align-items: flex-start;
      justify-content: space-between;
      gap: 16px;
      flex-wrap: wrap;
    }
    .workspace-actions { display: flex; gap: 12px; flex-wrap: wrap; }
    .migration-modal { position: fixed; inset: 0; display: none; align-items: center; justify-content: center; background: rgba(0,0,0,0.6); z-index: 500; padding: 24px; }
    .migration-modal.active { display: flex; }
    .migration-panel { width: min(820px, 100%); background: rgba(10,10,10,0.96); border: 1px solid rgba(255,255,255,0.1); border-radius: 28px; padding: 24px; box-shadow: 0 30px 80px rgba(0,0,0,0.5); }
    .migration-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
    .migration-table { width: 100%; border-collapse: collapse; margin-top: 16px; }
    .migration-table th, .migration-table td { text-align: left; padding: 10px 8px; border-bottom: 1px solid rgba(255,255,255,0.08); }
    .migration-table th { font-size: 0.7rem; letter-spacing: 0.14em; text-transform: uppercase; color: #c5baab; }

    .session-user {
      margin-top: 10px;
      color: #dfd1ff;
    }

    .role-board {
      display: grid;
      gap: 18px;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      margin-top: 24px;
    }

    .role-card {
      padding: 20px;
      border-radius: 24px;
      border: 1px solid var(--line);
      background: rgba(255, 255, 255, 0.03);
      display: grid;
      gap: 12px;
      align-content: start;
    }

    .role-card h3 {
      font-size: 1.1rem;
      margin: 0;
    }

    .role-card-meta {
      color: #c5baab;
      font-size: 0.72rem;
      letter-spacing: 0.14em;
      text-transform: uppercase;
    }

    .role-card-detail {
      color: var(--muted);
      line-height: 1.6;
      white-space: pre-line;
    }

    .role-card-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }

    .role-links {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }

    .group-grid {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 20px;
      margin-top: 24px;
    }

    .security-grid {
      display: grid;
      gap: 20px;
      margin-top: 24px;
    }

    .group-card {
      padding: 24px;
      border-radius: 28px;
      border: 1px solid var(--line);
      background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.02)),
        rgba(18, 18, 18, 0.96);
    }

    .security-card {
      display: grid;
      gap: 16px;
    }

    .passkey-field {
      max-width: 360px;
    }

    .passkey-summary {
      padding: 14px 16px;
      border-radius: 20px;
      border: 1px solid var(--line);
      background: rgba(255, 255, 255, 0.03);
    }

    .passkey-list {
      display: grid;
      gap: 12px;
    }

    .passkey-item {
      padding: 16px 18px;
      border-radius: 22px;
      border: 1px solid var(--line);
      background: rgba(255, 255, 255, 0.025);
      display: grid;
      gap: 10px;
    }

    .passkey-item-head {
      display: flex;
      align-items: flex-start;
      justify-content: space-between;
      gap: 12px;
      flex-wrap: wrap;
    }

    .passkey-item strong {
      color: var(--text);
      font-size: 1rem;
    }

    .group-card[hidden] {
      display: none;
    }

    .group-meta {
      display: block;
      margin-bottom: 10px;
    }

    .group-links {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 18px;
    }

    .link-pill {
      display: inline-flex;
      align-items: center;
      padding: 11px 14px;
      border-radius: 999px;
      border: 1px solid var(--line);
      background: rgba(255, 255, 255, 0.03);
      color: var(--text);
      font-size: 0.72rem;
    }

    .empty-state {
      display: none;
      margin-top: 24px;
      padding: 22px;
      border-radius: 24px;
      border: 1px dashed var(--line);
      color: var(--muted);
      line-height: 1.7;
    }

    .empty-state.active {
      display: block;
    }

    .credential-gate {
      position: fixed;
      inset: 0;
      z-index: 1200;
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 24px;
      background: rgba(10, 10, 10, 0.72);
      backdrop-filter: blur(10px);
    }

    .credential-gate[hidden] {
      display: none;
    }

    .credential-gate-panel {
      width: min(560px, 100%);
      padding: 28px;
      border-radius: 28px;
      border: 1px solid var(--line);
      background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.02)),
        rgba(18, 18, 18, 0.98);
      display: grid;
      gap: 16px;
      box-shadow: 0 24px 80px rgba(0, 0, 0, 0.34);
    }

    .credential-gate-meta {
      color: var(--accent-soft);
      font-size: 0.74rem;
      letter-spacing: 0.14em;
      text-transform: uppercase;
    }

    .credential-gate-panel h3 {
      margin: 0;
      font-size: 1.5rem;
    }

    .credential-gate-copy {
      color: var(--muted);
      line-height: 1.7;
    }

    .credential-gate-steps {
      display: flex;
      gap: 10px;
      flex-wrap: wrap;
    }

    .credential-gate-step {
      padding: 8px 12px;
      border-radius: 999px;
      border: 1px solid var(--line);
      color: var(--muted);
      font-size: 0.76rem;
      letter-spacing: 0.08em;
      text-transform: uppercase;
    }

    .credential-gate-step.active {
      border-color: rgba(196, 163, 120, 0.45);
      background: rgba(196, 163, 120, 0.12);
      color: var(--text);
    }

    .credential-gate-step.done {
      border-color: rgba(72, 214, 145, 0.3);
      color: #bff0d7;
    }

    .credential-gate-actions {
      display: flex;
      gap: 12px;
      flex-wrap: wrap;
    }

    .credential-gate-section[hidden] {
      display: none;
    }

    @media (max-width: 980px) {
      .hero,
      .role-board,
      .group-grid {
        grid-template-columns: 1fr;
      }

      .topbar {
        align-items: flex-start;
        flex-direction: column;
      }
    }

    @media (max-width: 640px) {
      .shell {
        width: min(100% - 20px, 100%);
        padding-top: 18px;
      }

      .topbar,
      .intro-panel,
      .login-card,
      .workspace {
        padding: 24px;
        border-radius: 26px;
      }

      h1 {
        font-size: 2.8rem;
      }

      .brand {
        align-items: flex-start;
        flex-direction: column;
      }
    }

    .brand-mark {
      padding: 14px 18px;
      background: #050505;
      border: 1px solid rgba(0, 0, 0, 0.92);
      border-radius: 24px;
      box-shadow: 0 24px 42px rgba(0, 0, 0, 0.22);
      box-sizing: border-box;
    }