:root {
      --bg: #f4f1eb;
      --paper: rgba(255, 255, 255, 0.82);
      --ink: #18212b;
      --muted: #5d6872;
      --line: rgba(24, 33, 43, 0.1);
      --line-strong: rgba(24, 33, 43, 0.16);
      --accent: #23425e;
      --success: #24664a;
      --danger: #a14842;
      --shadow: 0 24px 60px rgba(24, 33, 43, 0.08);
      --sans: "Segoe UI", "Segoe UI Variable Text", "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
    }

    html {
      scrollbar-gutter: stable;
      -webkit-text-size-adjust: 100%;
    }

    * { box-sizing: border-box; margin: 0; padding: 0; }
    body {
      font-family: var(--sans);
      background:
        radial-gradient(circle at top left, rgba(255,255,255,0.92), rgba(255,255,255,0) 38%),
        linear-gradient(180deg, #fbfaf7 0%, var(--bg) 100%);
      color: var(--ink);
      min-height: 100vh;
      padding: 24px;
    }
    a { color: inherit; text-decoration: none; }
    button,
    input,
    select { font: inherit; }
    button { cursor: pointer; }

    .page {
      max-width: 1180px;
      margin: 0 auto;
    }
    .frame {
      background: var(--paper);
      border: 1px solid rgba(255,255,255,0.7);
      box-shadow: var(--shadow);
      border-radius: 36px;
      backdrop-filter: blur(18px);
      overflow: hidden;
      animation: page-soft-rise 0.45s ease-out both;
    }
    .shell > .panel {
      animation: page-soft-rise 0.42s ease-out both;
      animation-delay: 0.08s;
    }
    @keyframes page-soft-rise {
      from { opacity: 0; transform: translateY(8px); }
      to { opacity: 1; transform: translateY(0); }
    }
    @media (prefers-reduced-motion: reduce) {
      .frame,
      .shell > .panel {
        animation: none;
      }
    }
    .nav {
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 16px;
      padding: 22px 26px;
      border-bottom: 1px solid var(--line);
    }
    .brand {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      font-size: 1.2rem;
      font-weight: 700;
      letter-spacing: 0.02em;
    }
    .brand-mark {
      width: 32px;
      height: 32px;
      flex-shrink: 0;
      display: block;
      filter: drop-shadow(0 2px 5px rgba(35, 66, 94, 0.22));
    }
    .nav-actions {
      display: flex;
      gap: 10px;
      flex-wrap: wrap;
    }
    .nav-link,
    .nav-danger,
    .nav-pill,
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border-radius: 999px;
      font-size: 0.9rem;
      font-weight: 700;
      transition: transform 0.16s ease, border-color 0.16s ease, background 0.16s ease;
    }
    .nav-link,
    .nav-danger,
    .nav-pill {
      padding: 12px 18px;
      border: 1px solid var(--line-strong);
      background: rgba(255,255,255,0.8);
      color: var(--ink);
    }
    .nav-link:hover,
    .nav-danger:hover,
    .btn:hover {
      transform: translateY(-1px);
    }
    .nav-danger {
      border-color: rgba(161, 72, 66, 0.18);
      color: var(--danger);
    }
    .nav-pill {
      color: var(--ink);
      cursor: default;
    }
    .nav-pill[aria-current="page"] {
      background: linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(230, 238, 245, 0.65));
      border-color: rgba(35, 66, 94, 0.34);
      box-shadow:
        0 0 0 1px rgba(35, 66, 94, 0.06),
        0 4px 16px rgba(35, 66, 94, 0.1);
      color: var(--accent);
    }
    .nav-menu-btn {
      display: none;
      align-items: center;
      justify-content: center;
      width: 44px;
      height: 44px;
      padding: 0;
      border-radius: 999px;
      border: 1px solid var(--line-strong);
      background: #ffffff;
      color: var(--accent);
      cursor: pointer;
      box-shadow: 0 2px 10px rgba(24, 33, 43, 0.05);
      flex-shrink: 0;
      transition: border-color 0.16s ease, box-shadow 0.16s ease, background 0.16s ease;
    }
    .nav-menu-btn:hover {
      border-color: rgba(35, 66, 94, 0.28);
      box-shadow: 0 6px 16px rgba(24, 33, 43, 0.08);
    }
    .nav-menu-btn:focus-visible {
      outline: none;
      box-shadow: 0 0 0 3px rgba(35, 66, 94, 0.2);
    }
    .nav-menu-panel {
      display: none;
    }
    .sr-only {
      position: absolute;
      width: 1px;
      height: 1px;
      padding: 0;
      margin: -1px;
      overflow: hidden;
      clip: rect(0, 0, 0, 0);
      white-space: nowrap;
      border: 0;
    }

    .shell {
      padding: 24px;
      display: flex;
      justify-content: center;
    }
    .panel {
      width: min(940px, 100%);
      background: rgba(255,255,255,0.82);
      border: 1px solid var(--line);
      border-radius: 30px;
      padding: 28px;
    }
    h1 {
      font-size: clamp(2rem, 4vw, 2.7rem);
      font-weight: 750;
      letter-spacing: -0.03em;
      line-height: 1.05;
      margin-bottom: 14px;
    }
    .lead {
      color: var(--muted);
      max-width: none;
      white-space: nowrap;
      line-height: 1.7;
      margin-bottom: 24px;
    }
    .settings-stack {
      display: grid;
      gap: 18px;
    }
    .settings-section {
      border: 1px solid var(--line);
      border-radius: 26px;
      padding: 24px;
      background:
        linear-gradient(180deg, rgba(255,255,255,0.92), rgba(255,255,255,0.78)),
        linear-gradient(135deg, rgba(230,238,245,0.16), rgba(255,255,255,0));
    }
    .section-head {
      display: flex;
      justify-content: space-between;
      gap: 12px;
      align-items: flex-start;
      margin-bottom: 16px;
      flex-wrap: wrap;
    }
    .section-head h2 {
      font-size: 1.18rem;
      letter-spacing: -0.02em;
      margin: 0;
    }
    .field-label {
      font-size: 0.74rem;
      text-transform: uppercase;
      letter-spacing: 0.12em;
      color: #7a8390;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .form-grid,
    .card-form-grid {
      display: grid;
      gap: 14px;
      margin-bottom: 14px;
    }
    .form-grid {
      grid-template-columns: repeat(2, minmax(0, 1fr));
      margin-bottom: 20px;
    }
    .card-form-grid {
      grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr) minmax(0, 0.9fr);
      align-items: end;
      margin-bottom: 20px;
    }
    .brand-control-slot {
      display: flex;
      flex-direction: column;
      gap: 0;
    }
    .brand-custom-row {
      display: none;
      align-items: stretch;
      gap: 8px;
    }
    .brand-custom-row.is-visible {
      display: flex;
    }
    .brand-custom-row .text-input {
      flex: 1;
      min-width: 0;
    }
    .brand-list-btn {
      flex: 0 0 auto;
      padding: 14px 14px;
      border-radius: 18px;
      border: 1px solid var(--line-strong);
      background: rgba(255, 255, 255, 0.95);
      color: var(--muted);
      font-size: 0.82rem;
      font-weight: 700;
      white-space: nowrap;
    }
    .brand-list-btn:hover {
      border-color: rgba(35, 66, 94, 0.28);
      color: var(--ink);
    }
    .text-input,
    .select-input {
      width: 100%;
      padding: 14px 15px;
      border-radius: 18px;
      border: 1px solid var(--line-strong);
      background: rgba(255,255,255,0.98);
      outline: none;
      color: var(--ink);
    }
    .text-input:focus,
    .select-input:focus {
      border-color: rgba(35, 66, 94, 0.42);
      box-shadow: 0 0 0 4px rgba(35, 66, 94, 0.08);
    }
    .btn {
      padding: 12px 18px;
      border: 1px solid transparent;
    }
    .btn-primary {
      background: var(--accent);
      color: #ffffff;
      box-shadow: 0 14px 28px rgba(35, 66, 94, 0.18);
    }
    .btn-secondary {
      background: rgba(255,255,255,0.88);
      color: var(--ink);
      border-color: var(--line-strong);
    }
    .btn-danger {
      background: #8f3f38;
      color: #ffffff;
      border-color: rgba(143, 63, 56, 0.42);
      box-shadow: 0 14px 28px rgba(143, 63, 56, 0.14);
    }
    .btn-success {
      background: var(--success);
      color: #ffffff;
      border-color: rgba(36, 102, 74, 0.36);
      box-shadow: 0 14px 28px rgba(36, 102, 74, 0.16);
    }
    .btn-primary:disabled,
    .btn-secondary:disabled,
    .btn-danger:disabled {
      opacity: 0.45;
      cursor: not-allowed;
      transform: none;
      box-shadow: none;
    }
    .actions {
      display: flex;
      gap: 12px;
      align-items: center;
      flex-wrap: wrap;
    }
    .status-msg {
      display: none;
      font-size: 0.86rem;
      font-weight: 500;
      line-height: 1.58;
      text-wrap: pretty;
    }
    .status-msg.success {
      color: var(--success);
      width: auto;
      max-width: 100%;
      padding: 13px 18px;
      border-radius: 999px;
      background: linear-gradient(180deg, rgba(228, 243, 234, 0.92), rgba(255, 255, 255, 0.92));
      border: 1px solid rgba(36, 102, 74, 0.2);
      box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.68);
    }
    .status-msg.error { color: var(--danger); }
    .note {
      margin-top: 12px;
      color: var(--muted);
      font-size: 0.84rem;
      line-height: 1.6;
    }
    .card-list {
      display: grid;
      gap: 10px;
      margin-bottom: 0;
    }
    .card-list:not(:empty) {
      margin-bottom: 18px;
    }
    .saved-card {
      display: flex;
      justify-content: space-between;
      gap: 12px;
      align-items: center;
      border: 1px solid var(--line);
      border-radius: 18px;
      padding: 14px 16px;
      background: rgba(255,255,255,0.9);
    }
    .saved-card-label {
      font-weight: 700;
      letter-spacing: -0.01em;
      margin-bottom: 4px;
    }
    .saved-card-meta {
      color: var(--muted);
      font-size: 0.82rem;
      line-height: 1.5;
    }
    .empty-state {
      display: none;
      align-items: center;
      gap: 10px;
      color: var(--muted);
      line-height: 1.58;
      margin-bottom: 18px;
      font-size: 0.88rem;
      font-weight: 500;
      text-wrap: pretty;
    }
    .empty-state::before {
      content: "";
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: #8aa0b2;
      flex: 0 0 auto;
      box-shadow: 0 0 0 4px rgba(138, 160, 178, 0.12);
    }
    .empty-state-label {
      color: var(--ink);
      font-weight: inherit;
    }
    .empty-state.success {
      color: var(--success);
      width: fit-content;
      max-width: 100%;
      margin-inline: auto;
      text-align: center;
      padding: 13px 18px;
      border-radius: 999px;
      background: linear-gradient(180deg, rgba(228, 243, 234, 0.92), rgba(255, 255, 255, 0.92));
      border: 1px solid rgba(36, 102, 74, 0.2);
      box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.68);
      justify-content: center;
    }
    .empty-state.success::before {
      content: none;
    }
    .empty-state.success .empty-state-label {
      color: var(--success);
    }
    .empty-state.danger {
      color: var(--danger);
      width: fit-content;
      max-width: 100%;
      margin-inline: auto;
      text-align: center;
      padding: 13px 18px;
      border-radius: 999px;
      background: linear-gradient(180deg, rgba(243, 228, 226, 0.92), rgba(255, 255, 255, 0.92));
      border: 1px solid rgba(161, 72, 66, 0.2);
      box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.68);
      justify-content: center;
    }
    .empty-state.danger::before {
      content: none;
    }
    .empty-state.danger .empty-state-label {
      color: var(--danger);
    }

    .spinner {
      display: inline-block;
      width: 14px;
      height: 14px;
      border: 2px solid rgba(255,255,255,0.35);
      border-top-color: #ffffff;
      border-radius: 50%;
      animation: spin 0.7s linear infinite;
    }
    @keyframes spin { to { transform: rotate(360deg); } }

    @media (max-width: 980px) {
      .nav {
        flex-wrap: wrap;
        align-items: center;
        gap: 14px;
      }
      .nav .brand {
        flex: 1;
        min-width: 0;
        order: 1;
      }
      .nav-menu-btn {
        display: inline-flex;
        order: 2;
      }
      .nav .nav-actions {
        order: 3;
        flex-basis: 100%;
        width: 100%;
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 8px;
      }
      .nav .nav-actions > .nav-link,
      .nav .nav-actions > .nav-pill {
        flex: none;
        width: 100%;
        min-height: 44px;
      }
      .nav .nav-actions > .nav-danger--desktop {
        display: none;
      }
      .nav-menu-panel {
        order: 4;
        flex-basis: 100%;
        width: 100%;
        display: none;
      }
      .nav.nav--open .nav-menu-panel {
        display: flex;
        flex-direction: column;
        gap: 8px;
      }
      .nav-menu-panel > .nav-danger {
        width: 100%;
        min-height: 44px;
      }
    }

    @media (max-width: 860px) {
      body { padding: 16px; }
    }

    @media (max-width: 720px) {
      .shell {
        padding: 18px 14px 16px;
      }
      .panel {
        padding: 24px;
        border-radius: 24px;
      }
      .form-grid,
      .card-form-grid {
        grid-template-columns: 1fr;
      }
      .saved-card,
      .actions {
        align-items: stretch;
        flex-direction: column;
      }
      .empty-state {
        align-items: flex-start;
      }
      .btn {
        width: 100%;
      }
      .lead {
        white-space: normal;
      }
    }

    @media (max-width: 480px) {
      body {
        padding:
          max(12px, env(safe-area-inset-top, 0px))
          max(12px, env(safe-area-inset-right, 0px))
          max(14px, env(safe-area-inset-bottom, 0px))
          max(12px, env(safe-area-inset-left, 0px));
        touch-action: manipulation;
      }
      .frame {
        border-radius: 22px;
      }
      .nav {
        padding: 16px 18px;
      }
      .nav-actions {
        gap: 8px;
      }
      .nav-link,
      .nav-danger {
        min-height: 44px;
      }
      .nav-danger {
        width: 100%;
      }
    }