:root {
    /* 🎨 Bright Pastel Theme */
    --bg: #f8fafc;
    --panel: #ffffff;
    --card: #ffffff;
    --ink: #334155;
    --muted: #64748b;
    --line: #e2e8f0;

    /* สดใส */
    --accent: #3b82f6;           /* ฟ้า */
    --accent-strong: #2563eb;    /* ฟ้าเข้ม */
    --ok: #22c55e;               /* เขียวมิ้นท์ */
    --warn: #f59e0b;             /* เหลือง */
    --bad: #ef4444;              /* แดงสด */

    --radius: 14px;
    --radius-sm: 10px;
    --radius-lg: 22px;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);

    --space: 14px;
    --space-lg: 18px;
    --space-xl: 24px;

    --fs-1: clamp(.95rem, .9rem + .2vw, 1.05rem);
    --fs-2: clamp(1.05rem, 1rem + .4vw, 1.2rem);
    --fs-3: clamp(1.25rem, 1.1rem + .8vw, 1.6rem);
  }
  *{box-sizing:border-box}
  html, body {
    margin: 0;
    background: var(--bg);
    color: var(--ink);
    font-family: "Noto Sans Thai", system-ui, sans-serif;
    line-height: 1.6;
  }
  a{color:#cfe4ff;text-decoration:none}
  img{max-width:100%;display:block}

  
  /* Sidebar */
  /* .sidebar{background:var(--panel);border-right:1px solid var(--line)} */
  .brand{padding:var(--space);border-bottom:1px solid var(--line);display:flex;align-items:center;gap:12px}
  .logo{width:38px;height:38px;border-radius:10px;background:linear-gradient(135deg,#0b1220,#0f172a);border:1px solid var(--line);box-shadow:inset 0 0 0 1px rgba(255,255,255,.02)}
  .brand h1{margin:0;font-size:var(--fs-2)}
  .brand small{display:block;margin-top:2px;color:var(--muted);font-weight:500}

  .nav{padding:6px}
  .nav a{display:flex;gap:10px;align-items:center;padding:10px 12px;border-radius:10px;border:1px solid transparent}
  .nav a .dot{width:8px;height:8px;border-radius:999px;background:var(--line)}
  .nav a:hover{background:#0b1220;border-color:var(--line)}
  .nav a.active{background:linear-gradient(180deg,#0b1220,#0f172a);border-color:#1e2a43}


  /* Layout */
  .app{display:grid;grid-template-columns:280px 1fr;min-height:100vh}
  @media(max-width:1024px){.app{grid-template-columns:1fr}}


  /* Mobile drawer */
  @media(max-width:1024px){
      .sidebar {
        position: fixed;
        inset: 0 20% 0 -1%;
        transform: translateX(-100%);
        transition: transform .25s ease;
        z-index: 50;
    }
    .sidebar.open{transform:translateX(0)}
    .backdrop{display:none;position:fixed;inset:0;background:rgba(0,0,0,.45);backdrop-filter:saturate(120%) blur(2px);z-index:40}
    .backdrop.show{display:block}
  }


  /* Main */
  .main{display:flex;flex-direction:column;min-width:0}
  .topbar{position:sticky;top:0;z-index:30;display:flex;align-items:center;justify-content:space-between;padding:10px var(--space);background:#0b1220;border-bottom:1px solid var(--line);box-shadow:0 6px 20px rgba(0,0,0,.25)}
  .title{font-size:var(--fs-2);font-weight:700}

  .content{padding:var(--space);display:grid;gap:var(--space)}
  .card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:var(--space);box-shadow:var(--shadow)}

  /* Grid utilities */
  .grid{display:grid;gap:var(--space)}
  .grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
  .grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}
  @media(max-width:1200px){.grid-4{grid-template-columns:repeat(3,minmax(0,1fr))}}
  @media(max-width:900px){.grid-3,.grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}}
  @media(max-width:640px){.grid-2,.grid-3,.grid-4{grid-template-columns:1fr}}

  /* Forms */
  label{color:#cbd5e1;font-size:.95rem;margin-bottom:6px;display:block}
  input,select,textarea{width:100%;padding:12px 12px;border-radius:12px;border:1px solid var(--line);background:#0b1220;color:var(--ink);outline:0;transition:border-color .15s}
  input:focus,select:focus,textarea:focus{border-color:var(--accent)}
  .input-row{display:grid;gap:10px;grid-template-columns:28px 1fr;align-items:center;border:1px solid var(--line);border-radius:12px;padding:6px 8px;background:#e0f2fe}
  .input-row input{border:0;background:transparent;padding:10px}
  .input-row svg{opacity:.7}

  /* Tables */
  .table-wrap{overflow:auto;border-radius:12px;border:1px solid var(--line)}
  table{width:100%;border-collapse:collapse;font-size:.95rem;min-width:640px;background:#eaedf2}
  th,td{border-bottom:1px dashed var(--line);padding:12px;text-align:left;vertical-align:top}
  th{color:#cbd5e1;font-weight:600;position:sticky;top:0;background:#0b1220}

  /* Badges & misc */
  .tag{border:1px solid var(--line);background:#0b1220;border-radius:999px;padding:4px 10px;font-size:.8rem;color:#cbd5e1}
  .role-pill{padding:6px 10px;border:1px solid var(--line);border-radius:999px;background:#0f172a}
  .avatar{width:48px;height:48px;border-radius:12px;background:#0b1220;border:1px solid var(--line)}
  .chart{height:160px;border:1px dashed var(--line);border-radius:12px;display:flex;align-items:center;justify-content:center;color:#7a8597}
  .sticky-footer{position:sticky;bottom:0;background:#0b1220;border-top:1px solid var(--line);padding:12px;border-bottom-left-radius:12px;border-bottom-right-radius:12px;display:flex;justify-content:flex-end;gap:10px}

  /* Buttons */
  .btn{display:inline-flex;gap:8px;align-items:center;justify-content:center;padding:10px 14px;border:1px solid var(--line);background:#0f172a;border-radius:12px;color:var(--ink);cursor:pointer;user-select:none}
  .btn:focus-visible{outline:2px solid var(--accent)}
  .btn-ghost{background:transparent}
  .btn-primary{background:var(--accent);color:#05202c;border-color:#1b9ab0;font-weight:700}
  .btn-danger{background:#2b0d0f;border-color:#571318;color:#ffb4b9}
  .btn-block{width:100%}

  /* Mobile FAB */
  .fab{position:fixed;right:14px;bottom:14px;z-index:35}
  @media(min-width:641px){.fab{display:none}}

  /* Helpers */
  .hidden{display:none !important}
  .muted{color:var(--muted)}

  /* Panels & Cards */
  .card {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: var(--space);
    box-shadow: var(--shadow);
    transition: transform 0.15s ease, box-shadow 0.15s ease;
  }
  .card:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 16px rgba(59,130,246,0.15);
  }


  /* Sidebar */
  /* .sidebar {
    background: linear-gradient(180deg, #f0f9ff, #e0f2fe);
    border-right: 1px solid var(--line);
  } */
  .nav a {
    color: #1e293b;
    border-radius: 10px;
    padding: 10px 14px;
  }
  .nav a:hover {
    background: #e0f2fe;
  }
  .nav a.active {
    background: #3b82f6;
    color: white;
  }

  /* Topbar */
  .topbar {
    background: linear-gradient(90deg, #3b82f6, #60a5fa);
    color: white;
    border-bottom: 1px solid #93c5fd;
  }

  /* Buttons */
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 14px;
    border-radius: 12px;
    border: 1px solid var(--line);
    cursor: pointer;
    transition: all .2s;
    font-weight: 600;
  }
  .btn-primary {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent-strong);
  }
  .btn-primary:hover {
    background: var(--accent-strong);
  }
  .btn-danger {
    background: var(--bad);
    color: #fff;
    border-color: #dc2626;
  }
  .btn:hover {
    transform: translateY(-2px);
  }

  /* Forms */
  input, select, textarea {
    background: #f8fafc;
    border: 1px solid var(--line);
    border-radius: 10px;
    padding: 10px 12px;
    color: var(--ink);
    transition: border-color .15s, box-shadow .15s;
  }
  input:focus, select:focus, textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(59,130,246,0.25);
  }

  /* Tables */
  .table-wrap {
    border: 1px solid var(--line);
    border-radius: 12px;
    overflow: auto;
  }
  table {
    width: 100%;
    border-collapse: collapse;
  }
  th {
    background: #f1f5f9;
    color: #475569;
    text-align: left;
    padding: 10px;
  }
  td {
    padding: 10px;
    border-top: 1px solid var(--line);
  }

  /* Accent tags */
  .tag {
    background: #e0f2fe;
    color: #0369a1;
    border-radius: 999px;
    padding: 4px 10px;
    font-size: 0.8rem;
  }

  /* Chart placeholder */
  .chart {
    background: #f1f5f9;
    border: 1px dashed #cbd5e1;
    color: #64748b;
    border-radius: 12px;
  }

  /* Floating Action Button (mobile) */
  .fab .btn-primary {
    background: #3b82f6;
    box-shadow: 0 6px 14px rgba(59,130,246,0.4);
  }
  .fab .btn-primary:hover {
    background: #2563eb;
  }