@import url('https://fonts.googleapis.com/css2?family=Sarabun:wght@300;400;500;600;700&display=swap');

  :root {
    /* ✅ Enhanced Color Palette */
    --bg-primary: #fefefe;
    --bg-secondary: #ffffff;
    --bg-tertiary: #faf9f7;
    --bg-warm: #f5f3f0;
    --text-primary: #2d3748;
    --text-secondary: #5a6578;
    --text-muted: #9ca3af;
    --text-light: #b5b5b5;
    --border: #e2e8f0;
    --border-soft: #f0eeeb;

    /* ✅ Vibrant Accent Colors */
    --accent: #6366f1;
    --accent-light: #818cf8;
    --accent-dark: #4f46e5;
    --accent-soft: rgba(99, 102, 241, .08);
    --accent-glow: rgba(99, 102, 241, .25);

    /* ✅ Status Colors */
    --success: #10b981;
    --success-soft: rgba(16, 185, 129, .1);
    --warning: #f59e0b;
    --warning-soft: rgba(245, 158, 11, .1);
    --danger: #ef4444;
    --danger-soft: rgba(239, 68, 68, .1);

    /* ✅ Enhanced Shadows */
    /* ✅ OPTIMIZED: ลด shadow layers สำหรับ performance */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, .04);
    --shadow-sm: 0 2px 6px rgba(0, 0, 0, .05);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, .06);
    --shadow-lg: 0 6px 20px rgba(0, 0, 0, .08);
    --shadow-xl: 0 10px 30px rgba(0, 0, 0, .1);
    --shadow-glow: 0 0 20px var(--accent-glow);
    --shadow-accent: 0 3px 12px var(--accent-glow);

    --radius-sm: 10px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    /* ✅ OPTIMIZED: ใช้ transform แทน all เพื่อใช้ GPU acceleration */
    --transition: transform .25s cubic-bezier(.4, 0, .2, 1), opacity .25s ease;
    --transition-fast: transform .12s ease, opacity .12s ease;
  }

  * {
    box-sizing: border-box
  }

  body {
    margin: 0;
    font-family: 'Sarabun', system-ui;
    color: var(--text-primary);
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 50%, #f1f5f9 100%);
    background-attachment: fixed;
    min-height: 100vh;
  }

  .app {
    width: 100%;
    max-width: 100%;
    margin: 0;
    padding: 24px 28px;
  }

  /* ✅ OPTIMIZED: ลด backdrop-filter และ shadow layers */
  .topbar {
    display: flex;
    gap: 24px;
    justify-content: space-between;
    align-items: center;
    padding: 20px 32px;
    background: rgba(255, 255, 255, .96);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border);
    margin-bottom: 24px;
    will-change: transform;
  }

  .brand {
    display: flex;
    align-items: center;
    gap: 18px
  }

  .brand img {
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition)
  }

  .brand img:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-md)
  }

  .brand-text {
    display: flex;
    flex-direction: column;
    gap: 4px
  }

  .title {
    font-size: 26px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-light) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -.5px;
  }

  .subtitle {
    font-size: 13px;
    color: var(--text-muted);
    font-weight: 500
  }

  .actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    align-items: center
  }

  /* ✅ Enhanced Buttons */
  /* ✅ OPTIMIZED: ลด pseudo-element และ transition properties */
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    font: inherit;
    font-size: 14px;
    font-weight: 600;
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    background: var(--bg-secondary);
    color: var(--text-primary);
    cursor: pointer;
    transition: transform .2s ease, background-color .2s ease, box-shadow .2s ease;
    box-shadow: var(--shadow-xs);
    will-change: transform;
  }

  .btn:hover {
    background: var(--bg-tertiary);
    box-shadow: var(--shadow-sm);
    transform: translateY(-1px);
  }

  .btn:active {
    transform: translateY(0);
    box-shadow: var(--shadow-xs);
  }

  .btn.primary {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
    border: none;
    color: #fff;
    font-weight: 600;
    box-shadow: var(--shadow-accent);
  }

  .btn.primary:hover {
    background: linear-gradient(135deg, var(--accent-light) 0%, var(--accent) 100%);
    box-shadow: 0 6px 20px var(--accent-glow);
    transform: translateY(-2px);
  }

  .btn.ghost {
    background: transparent;
    border-color: transparent;
    box-shadow: none;
    color: var(--text-secondary)
  }

  .btn.ghost:hover {
    background: var(--accent-soft);
    color: var(--accent)
  }

  .hidden {
    display: none !important
  }

  /* ✅ OPTIMIZED: ลด backdrop-filter และ composite layers */
  .panel {
    background: rgba(255, 255, 255, .96);
    border-radius: var(--radius-xl);
    padding: 28px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border);
  }

  .filters {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
    align-items: center;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border-soft);
    margin-bottom: 24px;
  }

  /* ✅ Enhanced Inputs */
  .input {
    padding: 13px 18px;
    font: inherit;
    font-size: 14px;
    border: 2px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
    color: var(--text-primary);
    outline: none;
    transition: var(--transition);
    box-shadow: var(--shadow-xs);
  }

  .input:hover {
    border-color: #cbd5e1
  }

  .input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 4px var(--accent-soft), var(--shadow-sm);
  }

  .input.small {
    width: 100px
  }

  select.input {
    cursor: pointer;
    min-width: 170px;
    padding-right: 36px
  }

  .status {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 12px 20px;
    font-size: 14px;
    font-weight: 600;
    color: var(--accent);
    background: var(--accent-soft);
    border-radius: var(--radius-md);
    margin-bottom: 20px;
    border: 1px solid rgba(99, 102, 241, .15);
  }

  /* ✅ Enhanced Table */
  .tableWrap {
    overflow: auto;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    background: var(--bg-secondary);
  }

  table {
    width: 100%;
    border-collapse: collapse;
    table-layout: auto
  }

  thead th {
    position: sticky;
    z-index: 3;
    background: linear-gradient(180deg, #f8fafc 0%, #f1f5f9 100%);
    border-bottom: 2px solid var(--border);
    padding: 16px 18px;
    text-align: left;
    white-space: nowrap;
  }

  thead tr.group-row th {
    top: 0;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--accent);
    font-weight: 700;
    background: linear-gradient(180deg, #eef2ff 0%, #e0e7ff 100%);
  }

  thead tr.col-row th {
    top: 48px;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: .5px;
    z-index: 2;
    cursor: pointer;
    transition: var(--transition-fast);
  }

  thead tr.col-row th:hover {
    color: var(--accent);
    background: #f8fafc
  }

  /* ✅ Zebra Striping & Enhanced Hover */
  tbody tr:nth-child(even) td {
    background: #fafbfc
  }

  tbody td {
    padding: 16px 18px;
    font-size: 14px;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-soft);
    vertical-align: middle;
    background: var(--bg-secondary);
    transition: var(--transition-fast);
  }

  /* ✅ OPTIMIZED: ลด transform และ gradient สำหรับ smooth scrolling */
  tbody tr {
    cursor: pointer;
    transition: background-color .15s ease;
  }

  tbody tr:hover td {
    background: var(--accent-soft);
    color: var(--accent-dark);
  }

  tbody tr:last-child td {
    border-bottom: none
  }

  /* ✅ Enhanced Pager */
  .pager {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 24px;
    padding-top: 20px;
    border-top: 1px solid var(--border-soft);
  }

  .pageInfo {
    font-size: 14px;
    color: var(--text-muted);
    font-weight: 600;
    padding: 10px 16px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
  }

  /* ✅ OPTIMIZED: ลด backdrop-filter และ animation complexity */
  .modalOverlay {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, .6);
    display: none;
    align-items: center;
    justify-content: center;
    padding: 28px;
    z-index: 1000;
  }

  .modal {
    width: min(1400px, 96vw);
    max-height: 92vh;
    overflow: auto;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    animation: modalSlideIn .3s cubic-bezier(.34, 1.3, .64, 1);
  }

  @keyframes modalSlideIn {
    from {
      opacity: 0;
      transform: translateY(-20px) scale(.96);
    }

    to {
      opacity: 1;
      transform: translateY(0) scale(1);
    }
  }

  .modalHeader {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 28px;
    border-bottom: 1px solid var(--border);
    background: linear-gradient(135deg, #f8fafc 0%, #eef2ff 100%);
  }

  .modalTitle {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-primary);
  }

  .modalBody {
    padding: 24px 28px;
    max-height: 70vh;
    overflow: auto;
  }

  .modalFooter {
    display: flex;
    justify-content: flex-end;
    gap: 14px;
    padding: 20px 28px;
    border-top: 1px solid var(--border);
    background: linear-gradient(180deg, #fafbfc 0%, #f1f5f9 100%);
  }

  /* ✅ Enhanced Sections */
  .section {
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 20px;
    margin-bottom: 16px;
    background: linear-gradient(180deg, #fff 0%, #fafbfc 100%);
    transition: var(--transition);
  }

  .section:hover {
    box-shadow: var(--shadow-sm)
  }

  .sectionTitle {
    font-weight: 700;
    font-size: 15px;
    color: var(--accent);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 10px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--accent-soft);
  }

  .sectionGrid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }

  .field {
    display: flex;
    flex-direction: column;
    gap: 8px
  }

  .field label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary)
  }

  textarea.input {
    min-height: 100px;
    resize: vertical
  }

  .uploadRow {
    display: flex;
    gap: 10px;
    align-items: center;
    flex-wrap: wrap
  }

  .uploadRow .input.file {
    padding: 10px 12px
  }

  .uploadStatus {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 6px
  }

  /* ✅ OPTIMIZED: ลด transform และ transition สำหรับ gallery */
  .thumb {
    width: 100%;
    max-height: 180px;
    object-fit: contain;
    border: 2px solid var(--border);
    border-radius: var(--radius-md);
    background: #fafbfc;
    padding: 8px;
    transition: border-color .2s ease, box-shadow .2s ease;
  }

  .thumb:hover {
    border-color: var(--accent);
    box-shadow: var(--shadow-md);
  }

  .gallery-item {
    transition: transform .2s ease;
  }

  .gallery-item:hover {
    transform: translateY(-2px);
  }

  /* ✅ Enhanced Spinner */
  .spinner {
    width: 52px;
    height: 52px;
    border: 4px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
  }

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

  /* ✅ Success Animation */
  @keyframes successPulse {
    0% {
      transform: scale(1)
    }

    50% {
      transform: scale(1.05)
    }

    100% {
      transform: scale(1)
    }
  }

  .success-text {
    animation: successPulse .5s ease
  }

  /* ✅ Visitor Counter */
  .visitor-counter {
    position: fixed;
    bottom: 24px;
    right: 24px;
    background: var(--bg-secondary);
    padding: 10px 18px;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border);
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    z-index: 100;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
    animation: slideUp 0.5s ease forwards;
  }
  
  .visitor-counter:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--accent-light);
  }

  @keyframes slideUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
  }

  /* ✅ Responsive */
  @media (max-width:1024px) {
    .sectionGrid {
      grid-template-columns: repeat(2, 1fr)
    }
  }

  @media (max-width:768px) {
    .app {
      padding: 16px
    }

    .topbar {
      flex-direction: column;
      align-items: flex-start;
      gap: 16px;
      padding: 20px
    }

    .panel {
      padding: 20px
    }

    .sectionGrid {
      grid-template-columns: 1fr
    }

    table {
      min-width: 1100px
    }

    thead tr.col-row th {
      top: 48px
    }

    .title {
      font-size: 22px
    }
  }


/* Firebase 100% additions */
.auth-user {font-size: 12px;color: var(--text-muted);max-width: 240px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.btn.warning {background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);border:none;color:#fff;box-shadow:var(--shadow-sm);}
.admin-badge {display:inline-flex;align-items:center;gap:6px;padding:6px 10px;border-radius:999px;background:var(--success-soft);color:var(--success);font-size:12px;font-weight:700;}
.user-badge {display:inline-flex;align-items:center;gap:6px;padding:6px 10px;border-radius:999px;background:var(--accent-soft);color:var(--accent);font-size:12px;font-weight:700;}
.image-preview {max-width:220px;max-height:160px;border-radius:14px;border:1px solid var(--border);box-shadow:var(--shadow-sm);object-fit:cover;background:#fff;display:block;margin-bottom:8px;}
.field small {display:block;color:var(--text-muted);font-size:11px;margin-top:5px;line-height:1.4;}
.empty-state {padding:36px;text-align:center;color:var(--text-muted);}
.row-actions {display:flex;gap:6px;flex-wrap:wrap;}
.mini {padding:7px 11px;font-size:12px;border-radius:10px;}
.table td.clickable {cursor:pointer;}
.table td.clickable:hover {color:var(--accent);text-decoration:underline;}
.import-box {max-width:920px;margin:24px auto;background:rgba(255,255,255,.96);border:1px solid var(--border);border-radius:24px;box-shadow:var(--shadow-md);padding:24px;}
code.inline {background:var(--bg-tertiary);border:1px solid var(--border-soft);border-radius:8px;padding:2px 6px;}