:root{
    --bg:#f6f7fb;
    --card:#ffffff;
    --text:#1f2937;
    --muted:#6b7280;
    --primary:#4f46e5;
    --primary-dark:#3730a3;
    --line:#e5e7eb;
    --danger:#dc2626;
    --success:#16a34a;
    --warning:#ca8a04;
}
*{box-sizing:border-box}
body{margin:0;font-family:Arial,'Noto Sans Thai',sans-serif;background:var(--bg);color:var(--text)}
a{color:inherit;text-decoration:none}
.topbar{position:sticky;top:0;z-index:5;background:rgba(255,255,255,.9);backdrop-filter:blur(12px);border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:14px 28px;gap:20px}
.brand{font-size:24px;font-weight:800;color:var(--primary)}
.topbar nav{display:flex;gap:12px;align-items:center;flex-wrap:wrap;font-size:14px}
.container{max-width:1180px;margin:0 auto;padding:32px 18px}
.footer{text-align:center;color:var(--muted);font-size:13px;padding:30px}
.hero{min-height:70vh;display:grid;place-items:center;text-align:center}
.hero-card{background:var(--card);padding:58px 38px;border-radius:30px;box-shadow:0 20px 50px rgba(0,0,0,.08);max-width:920px}
.hero h1{font-size:42px;line-height:1.25;margin:0 0 14px}
.hero p{font-size:20px;color:var(--muted);line-height:1.7}
.btn{display:inline-flex;align-items:center;justify-content:center;border:none;border-radius:999px;background:var(--primary);color:#fff;padding:12px 22px;font-size:16px;cursor:pointer;font-weight:700}
.btn:hover{background:var(--primary-dark)}
.btn.ghost{background:#eef0ff;color:var(--primary)}
.btn.danger{background:var(--danger)}
.btn.small{padding:8px 14px;font-size:14px}
.btn.block{width:100%}
.grid{display:grid;gap:18px}
.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))}
.card{background:var(--card);border:1px solid var(--line);border-radius:22px;padding:22px;box-shadow:0 10px 30px rgba(0,0,0,.04)}
.card h2,.card h3{margin-top:0}.muted{color:var(--muted)}
.stat{font-size:36px;font-weight:800;color:var(--primary)}
.form{display:grid;gap:14px;max-width:560px}.form.wide{max-width:none}
label{font-weight:700;font-size:14px}
input,textarea,select{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:14px;background:white;font-size:16px;font-family:inherit}
textarea{min-height:150px;resize:vertical}.row{display:flex;gap:12px;align-items:center;flex-wrap:wrap}.between{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}
.table{width:100%;border-collapse:collapse;background:white;border-radius:18px;overflow:hidden}.table th,.table td{padding:12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}.table th{background:#f9fafb;font-size:13px;color:var(--muted)}
.badge{display:inline-flex;padding:5px 10px;border-radius:999px;background:#eef0ff;color:var(--primary);font-size:12px;font-weight:700}.badge.green{background:#dcfce7;color:#166534}.badge.yellow{background:#fef9c3;color:#854d0e}.badge.red{background:#fee2e2;color:#991b1b}.badge.gray{background:#f3f4f6;color:#374151}
.alert{padding:14px 18px;border-radius:16px;margin-bottom:18px;border:1px solid var(--line);background:white}.alert.success{border-color:#bbf7d0;background:#f0fdf4;color:#166534}.alert.warning{border-color:#fde68a;background:#fffbeb;color:#92400e}.alert.error{border-color:#fecaca;background:#fef2f2;color:#991b1b}
.note-card{display:grid;gap:8px}.note-card h3{margin:0}.actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}.kpi{padding:18px;border-radius:20px;background:white;border:1px solid var(--line)}
@media (max-width:800px){.topbar{align-items:flex-start;flex-direction:column}.grid-2,.grid-3,.grid-4{grid-template-columns:1fr}.hero h1{font-size:30px}.hero p{font-size:17px}.table{font-size:14px}.container{padding:22px 14px}}
.mt-2{margin-top:18px}.auth-card{max-width:680px;margin:0 auto}.auth-grid{align-items:start}.link{color:var(--primary);font-weight:700}.codebox{display:block;white-space:normal;word-break:break-all;background:#0f172a;color:#e5e7eb;padding:14px;border-radius:14px;font-size:18px;letter-spacing:1px}.footer-links{display:block;margin-top:8px}.btn[disabled]{opacity:.6;cursor:not-allowed}.btn[disabled]:hover{background:#eef0ff;color:var(--primary)}
.soft{border:none;border-top:1px solid var(--line);margin:18px 0}.compact{gap:8px}.compact select{padding:8px 10px;font-size:14px}.check{display:flex;gap:8px;align-items:center;font-weight:600}.check input{width:auto}.warning-card{border-color:#fde68a;background:#fffbeb}.backup-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;max-width:520px}.backup-grid code{display:block;background:#0f172a;color:#e5e7eb;padding:12px;border-radius:12px;text-align:center;font-size:18px;letter-spacing:1px}.danger-zone{border-color:#fecaca;background:#fef2f2}@media(max-width:800px){.backup-grid{grid-template-columns:1fr}}
/* Notes v4 */
.note-editor{min-height:320px;line-height:1.7}
.note-content{min-height:260px;line-height:1.8;font-size:17px;white-space:normal}
.tag-list{display:flex;gap:6px;flex-wrap:wrap;margin-top:8px}
.tag{display:inline-flex;padding:4px 8px;border-radius:999px;background:#f3f4f6;color:#4f46e5;font-size:12px;font-weight:700}
.note-color-default{border-left:5px solid #e5e7eb}
.note-color-purple{border-left:5px solid #8b5cf6;background:linear-gradient(90deg,#faf5ff,#fff)}
.note-color-blue{border-left:5px solid #3b82f6;background:linear-gradient(90deg,#eff6ff,#fff)}
.note-color-green{border-left:5px solid #22c55e;background:linear-gradient(90deg,#f0fdf4,#fff)}
.note-color-yellow{border-left:5px solid #eab308;background:linear-gradient(90deg,#fefce8,#fff)}
.note-color-red{border-left:5px solid #ef4444;background:linear-gradient(90deg,#fef2f2,#fff)}
.note-color-gray{border-left:5px solid #6b7280;background:linear-gradient(90deg,#f9fafb,#fff)}
.note-card{min-height:260px}.note-card .actions form{display:inline-flex}.note-card p{line-height:1.6}
@media(max-width:800px){.note-editor{min-height:220px}.note-content{font-size:16px}}