:root {
      --bg: #f8f8f8;
      --surface: #ffffff;
      --text: #1f1f29;
      --text-soft: #66667a;
      --text-faint: #9393a5;
      --border: #e7e7ef;
      --shadow: 0 14px 32px rgba(32, 26, 75, 0.08);
      --shadow-soft: 0 6px 18px rgba(31, 31, 41, 0.06);
      --primary: #5b4cdb;
      --primary-deep: #4738cb;
      --primary-soft: rgba(91, 76, 219, 0.14);
      --success: #1f9f68;
      --success-soft: rgba(31, 159, 104, 0.14);
      --error: #d74b4b;
      --error-soft: rgba(215, 75, 75, 0.14);
      --warning: #d99618;
      --warning-soft: rgba(217, 150, 24, 0.16);
      --info: #3577d4;
      --info-soft: rgba(53, 119, 212, 0.15);
      --overlay: rgba(20, 20, 30, 0.48);
      --radius-lg: 20px;
      --radius-md: 12px;
      --radius-sm: 10px;
      --space-1: 4px;
      --space-2: 8px;
      --space-3: 12px;
      --space-4: 16px;
      --space-5: 20px;
      --space-6: 24px;
      --space-8: 32px;
      --space-10: 40px;
      --transition-fast: 200ms ease;
      --transition-medium: 300ms ease;
      --max-width: 1120px;
    }

    * {
      box-sizing: border-box;
    }

    html,
    body {
      margin: 0;
      min-height: 100%;
      background:
        radial-gradient(circle at top left, rgba(91, 76, 219, 0.08), transparent 28%),
        linear-gradient(180deg, #fbfbff 0%, var(--bg) 28%, var(--bg) 100%);
      color: var(--text);
      font-family: system-ui, -apple-system, sans-serif;
    }

    body {
      min-width: 375px;
    }

    button,
    input,
    textarea {
      font: inherit;
    }

    button {
      border: 0;
      cursor: pointer;
      background: none;
      color: inherit;
    }

    img {
      display: block;
      max-width: 100%;
    }

    .hidden {
      display: none !important;
    }

    .app-shell {
      width: min(calc(100% - 32px), var(--max-width));
      margin: 0 auto;
      padding: var(--space-8) 0 calc(84px + var(--space-8));
    }

    .topbar {
      display: flex;
      flex-wrap: wrap;
      align-items: flex-end;
      justify-content: space-between;
      gap: var(--space-5);
      margin-bottom: var(--space-8);
    }

    .title-block p {
      margin: 0 0 var(--space-2);
      color: var(--text-soft);
      font-size: 0.95rem;
    }

    .title-block h1 {
      margin: 0;
      font-size: clamp(2rem, 3.6vw, 3rem);
      line-height: 1;
      letter-spacing: -0.04em;
    }

    .tabs {
      display: inline-flex;
      gap: var(--space-2);
      padding: var(--space-2);
      background: rgba(255, 255, 255, 0.84);
      border: 1px solid rgba(231, 231, 239, 0.95);
      border-radius: 999px;
      box-shadow: var(--shadow-soft);
      backdrop-filter: blur(12px);
    }

    .tab-button {
      padding: 10px 16px;
      border-radius: 999px;
      color: var(--text-soft);
      font-weight: 600;
      transition: background-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
    }

    .tab-button:hover {
      color: var(--text);
      transform: translateY(-1px);
    }

    .tab-button.active {
      background: var(--primary);
      color: #ffffff;
      box-shadow: 0 10px 20px rgba(91, 76, 219, 0.28);
    }

    .panel {
      position: relative;
      min-height: 320px;
    }

    .cards-grid {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: var(--space-5);
    }

    .card {
      display: flex;
      flex-direction: column;
      min-height: 100%;
      background: var(--surface);
      border: 1px solid rgba(231, 231, 239, 0.88);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-soft);
      overflow: hidden;
      transition: transform var(--transition-fast), box-shadow var(--transition-fast), opacity var(--transition-fast);
    }

    .card:hover {
      transform: translateY(-2px);
      box-shadow: var(--shadow);
    }

    .card.highlight {
      animation: card-flash 1.6s ease;
    }

    .card.is-removing {
      opacity: 0;
      transform: scale(0.94);
    }

    .card-media {
      position: relative;
      aspect-ratio: 16 / 9;
      background:
        linear-gradient(135deg, rgba(91, 76, 219, 0.08), rgba(91, 76, 219, 0.2)),
        #efeff6;
      overflow: hidden;
    }

    .card-media img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .card-media.is-broken::before {
      content: "Preview unavailable";
      position: absolute;
      inset: 0;
      display: grid;
      place-items: center;
      color: var(--text-soft);
      font-size: 0.95rem;
      background:
        linear-gradient(135deg, rgba(91, 76, 219, 0.08), rgba(91, 76, 219, 0.18)),
        #f0eff8;
    }

    .card-body {
      display: flex;
      flex: 1;
      flex-direction: column;
      gap: var(--space-4);
      padding: var(--space-5);
    }

    .card-caption {
      margin: 0;
      color: var(--text);
      line-height: 1.55;
      display: -webkit-box;
      -webkit-line-clamp: 3;
      -webkit-box-orient: vertical;
      overflow: hidden;
      min-height: calc(1.55em * 3);
    }

    .card-footer {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: var(--space-4);
      margin-top: auto;
    }

    .meta-block {
      display: grid;
      gap: var(--space-2);
    }

    .scheduled-at {
      color: var(--text-soft);
      font-size: 0.95rem;
      font-weight: 500;
    }

    .status-badge {
      display: inline-flex;
      align-items: center;
      width: fit-content;
      gap: 6px;
      padding: 6px 10px;
      border-radius: 999px;
      font-size: 0.8rem;
      font-weight: 700;
      letter-spacing: 0.01em;
      text-transform: capitalize;
    }

    .status-badge::before {
      content: "";
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: currentColor;
    }

    .status-scheduled {
      background: var(--info-soft);
      color: var(--info);
    }

    .status-publishing {
      background: var(--warning-soft);
      color: var(--warning);
      animation: pulse 1.3s ease-in-out infinite;
    }

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

    .status-failed {
      background: var(--error-soft);
      color: var(--error);
    }

    .card-actions {
      display: inline-flex;
      align-items: center;
      gap: var(--space-2);
      flex-shrink: 0;
    }

    .icon-button {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 40px;
      height: 40px;
      border-radius: 999px;
      background: #f5f5fb;
      border: 1px solid var(--border);
      color: var(--text-soft);
      transition: transform var(--transition-fast), background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
    }

    .icon-button:hover {
      transform: translateY(-1px);
      background: var(--primary-soft);
      border-color: rgba(91, 76, 219, 0.22);
      color: var(--primary);
    }

    .icon-button.danger:hover {
      background: var(--error-soft);
      border-color: rgba(215, 75, 75, 0.24);
      color: var(--error);
    }

    .icon-button svg {
      width: 18px;
      height: 18px;
      stroke: currentColor;
      stroke-width: 1.9;
      fill: none;
      stroke-linecap: round;
      stroke-linejoin: round;
    }

    .delete-confirm {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: var(--space-3);
      padding: var(--space-3);
      background: #fff5f5;
      border: 1px solid rgba(215, 75, 75, 0.15);
      border-radius: var(--radius-sm);
      color: var(--text-soft);
      font-size: 0.92rem;
    }

    .confirm-actions {
      display: inline-flex;
      gap: var(--space-2);
      flex-shrink: 0;
    }

    .text-button {
      padding: 8px 12px;
      border-radius: 999px;
      font-size: 0.9rem;
      font-weight: 700;
      transition: background-color var(--transition-fast), color var(--transition-fast);
    }

    .text-button.ghost {
      background: rgba(255, 255, 255, 0.72);
      color: var(--text-soft);
    }

    .text-button.ghost:hover {
      background: rgba(31, 31, 41, 0.06);
      color: var(--text);
    }

    .text-button.danger {
      background: rgba(215, 75, 75, 0.12);
      color: var(--error);
    }

    .text-button.danger:hover {
      background: rgba(215, 75, 75, 0.18);
    }

    .empty-state {
      display: grid;
      place-items: center;
      min-height: 320px;
      padding: var(--space-10) var(--space-5);
      text-align: center;
      color: var(--text-soft);
      background: rgba(255, 255, 255, 0.75);
      border: 1px dashed rgba(91, 76, 219, 0.18);
      border-radius: var(--radius-lg);
    }

    .empty-state strong {
      display: block;
      margin-bottom: var(--space-2);
      color: var(--text);
      font-size: 1.05rem;
    }

    .skeleton-card {
      background: var(--surface);
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid rgba(231, 231, 239, 0.88);
      box-shadow: var(--shadow-soft);
    }

    .skeleton-media,
    .skeleton-line,
    .skeleton-pill,
    .skeleton-button {
      position: relative;
      overflow: hidden;
      background: #ececf4;
    }

    .skeleton-media::after,
    .skeleton-line::after,
    .skeleton-pill::after,
    .skeleton-button::after {
      content: "";
      position: absolute;
      inset: 0;
      transform: translateX(-100%);
      background: linear-gradient(90deg, transparent 0%, rgba(255, 255, 255, 0.8) 50%, transparent 100%);
      animation: shimmer 1.4s linear infinite;
    }

    .skeleton-media {
      aspect-ratio: 16 / 9;
    }

    .skeleton-content {
      padding: var(--space-5);
    }

    .skeleton-line {
      height: 12px;
      margin-bottom: var(--space-3);
      border-radius: 999px;
    }

    .skeleton-line.short {
      width: 58%;
    }

    .skeleton-line.medium {
      width: 76%;
    }

    .skeleton-line:last-child {
      margin-bottom: 0;
    }

    .skeleton-footer {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: var(--space-4);
      margin-top: var(--space-5);
    }

    .skeleton-pill {
      width: 94px;
      height: 28px;
      border-radius: 999px;
    }

    .skeleton-actions {
      display: flex;
      gap: var(--space-2);
    }

    .skeleton-button {
      width: 40px;
      height: 40px;
      border-radius: 50%;
    }

    .fab {
      position: fixed;
      right: max(18px, env(safe-area-inset-right));
      bottom: max(18px, env(safe-area-inset-bottom));
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 64px;
      height: 64px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary), #7a6ef0);
      color: #ffffff;
      font-size: 2rem;
      line-height: 1;
      box-shadow: 0 18px 30px rgba(91, 76, 219, 0.34);
      transition: transform var(--transition-fast), box-shadow var(--transition-fast);
      z-index: 20;
    }

    .fab:hover {
      transform: translateY(-2px) scale(1.02);
      box-shadow: 0 24px 40px rgba(91, 76, 219, 0.38);
    }

    .modal-overlay {
      position: fixed;
      inset: 0;
      display: flex;
      align-items: center;
      justify-content: center;
      padding: var(--space-5);
      background: var(--overlay);
      opacity: 0;
      visibility: hidden;
      transition: opacity var(--transition-medium), visibility var(--transition-medium);
      z-index: 30;
    }

    .modal-overlay.is-open {
      opacity: 1;
      visibility: visible;
    }

    .modal {
      width: min(100%, 560px);
      max-height: min(92vh, 860px);
      overflow: auto;
      padding: var(--space-6);
      background: var(--surface);
      border-radius: 22px;
      box-shadow: var(--shadow);
      transform: translateY(18px) scale(0.98);
      transition: transform var(--transition-medium);
    }

    .modal-overlay.is-open .modal {
      transform: translateY(0) scale(1);
    }

    .modal-header {
      display: flex;
      align-items: flex-start;
      justify-content: space-between;
      gap: var(--space-4);
      margin-bottom: var(--space-6);
    }

    .modal-header h2 {
      margin: 0 0 var(--space-2);
      font-size: 1.5rem;
      letter-spacing: -0.03em;
    }

    .modal-header p {
      margin: 0;
      color: var(--text-soft);
    }

    .close-button {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: #f6f6fb;
      color: var(--text-soft);
      transition: background-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
    }

    .close-button:hover {
      background: #ececf6;
      color: var(--text);
      transform: rotate(90deg);
    }

    .form-grid {
      display: grid;
      gap: var(--space-5);
    }

    .field {
      display: grid;
      gap: var(--space-2);
    }

    .field-header,
    .counter-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: var(--space-3);
    }

    .field label {
      color: var(--text);
      font-size: 0.95rem;
      font-weight: 700;
    }

    .field input,
    .field textarea,
    .field select {
      width: 100%;
      padding: 14px 16px;
      border: 1px solid var(--border);
      border-radius: var(--radius-sm);
      background: #ffffff;
      color: var(--text);
      transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    }

    .field textarea {
      min-height: 152px;
      resize: vertical;
    }

    .field input[type="file"] {
      padding: 12px;
      background: #fafafe;
      cursor: pointer;
    }

    .field input[type="file"]:disabled {
      background: #f1f1f6;
      color: var(--text-faint);
      cursor: not-allowed;
    }

    .field input:focus,
    .field textarea:focus,
    .field select:focus {
      outline: none;
      border-color: rgba(91, 76, 219, 0.56);
      box-shadow: 0 0 0 4px rgba(91, 76, 219, 0.12);
    }

    .field.is-invalid input,
    .field.is-invalid textarea,
    .field.is-invalid select {
      border-color: rgba(215, 75, 75, 0.54);
      box-shadow: 0 0 0 4px rgba(215, 75, 75, 0.08);
    }

    .counter {
      color: var(--text-faint);
      font-size: 0.9rem;
      font-variant-numeric: tabular-nums;
    }

    .input-hint {
      color: var(--text-faint);
      font-size: 0.86rem;
    }

    .field-error {
      min-height: 18px;
      color: var(--error);
      font-size: 0.84rem;
    }

    .datetime-grid {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: var(--space-4);
    }

    .preview-panel {
      overflow: hidden;
      border-radius: 14px;
      border: 1px dashed rgba(91, 76, 219, 0.26);
      background:
        linear-gradient(135deg, rgba(91, 76, 219, 0.07), rgba(91, 76, 219, 0.16)),
        #f4f2ff;
    }

    .preview-frame {
      position: relative;
      aspect-ratio: 16 / 9;
      overflow: hidden;
    }

    .preview-frame img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .preview-placeholder {
      position: absolute;
      inset: 0;
      display: grid;
      place-items: center;
      padding: var(--space-5);
      text-align: center;
      color: var(--text-soft);
      font-size: 0.95rem;
      line-height: 1.4;
    }

    .modal-actions {
      display: flex;
      justify-content: flex-end;
      gap: var(--space-3);
      margin-top: var(--space-3);
    }

    .button {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 10px;
      min-width: 112px;
      padding: 13px 18px;
      border-radius: 999px;
      font-weight: 700;
      transition: transform var(--transition-fast), background-color var(--transition-fast), color var(--transition-fast), opacity var(--transition-fast);
    }

    .button:hover:not(:disabled) {
      transform: translateY(-1px);
    }

    .button:disabled {
      cursor: wait;
      opacity: 0.72;
    }

    .button.secondary {
      background: #f3f3f8;
      color: var(--text);
      border: 1px solid var(--border);
    }

    .button.secondary:hover:not(:disabled) {
      background: #ececf5;
    }

    .button.primary {
      background: var(--primary);
      color: #ffffff;
      box-shadow: 0 12px 24px rgba(91, 76, 219, 0.24);
    }

    .button.primary:hover:not(:disabled) {
      background: var(--primary-deep);
    }

    .button-spinner {
      width: 16px;
      height: 16px;
      border: 2px solid rgba(255, 255, 255, 0.42);
      border-top-color: #ffffff;
      border-radius: 50%;
      animation: spin 0.9s linear infinite;
    }

    .toast-stack {
      position: fixed;
      left: 50%;
      bottom: calc(18px + env(safe-area-inset-bottom));
      transform: translateX(-50%);
      display: flex;
      flex-direction: column;
      gap: var(--space-3);
      width: min(calc(100% - 32px), 420px);
      z-index: 40;
      pointer-events: none;
    }

    .toast {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: var(--space-3);
      padding: 14px 16px;
      border-radius: 14px;
      box-shadow: var(--shadow);
      color: #ffffff;
      transform: translateY(12px);
      opacity: 0;
      animation: toast-in 220ms ease forwards;
      pointer-events: auto;
    }

    .toast.success {
      background: linear-gradient(135deg, #24a86e, #1d8e5d);
    }

    .toast.error {
      background: linear-gradient(135deg, #df5252, #bf3e3e);
    }

    .toast button {
      color: rgba(255, 255, 255, 0.86);
      font-weight: 700;
    }

    @keyframes shimmer {
      100% {
        transform: translateX(100%);
      }
    }

    @keyframes pulse {
      0%, 100% {
        box-shadow: 0 0 0 0 rgba(217, 150, 24, 0.16);
      }
      50% {
        box-shadow: 0 0 0 10px rgba(217, 150, 24, 0);
      }
    }

    @keyframes spin {
      to {
        transform: rotate(360deg);
      }
    }

    @keyframes toast-in {
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }

    @keyframes card-flash {
      0% {
        box-shadow: 0 0 0 0 rgba(91, 76, 219, 0.2);
      }
      30% {
        box-shadow: 0 0 0 10px rgba(91, 76, 219, 0.06);
      }
      100% {
        box-shadow: var(--shadow-soft);
      }
    }

    @media (max-width: 820px) {
      .cards-grid {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 640px) {
      .app-shell {
        width: min(calc(100% - 20px), var(--max-width));
        padding-top: var(--space-6);
      }

      .topbar {
        align-items: stretch;
      }

      .tabs {
        width: 100%;
        justify-content: space-between;
      }

      .tab-button {
        flex: 1;
        text-align: center;
      }

      .modal {
        padding: var(--space-5);
      }

      .datetime-grid {
        grid-template-columns: 1fr;
      }

      .delete-confirm {
        flex-direction: column;
        align-items: stretch;
      }

      .confirm-actions {
        justify-content: flex-end;
      }
    }