:root {
  --bg: #f4f6fb;
  --surface: #ffffff;
  --surface-2: #f8fafd;
  --border: #e3e8f1;
  --text: #0f172a;
  --muted: #5b6b86;
  --primary: #0078e4;
  --primary-600: #0062bd;
  --primary-50: #e6f2fd;
  --success: #16a34a;
  --success-50: #e8f7ee;
  --warn: #d97706;
  --warn-50: #fdf3e2;
  --danger: #dc2626;
  --danger-50: #fdecec;
  --info: #0891b2;
  --info-50: #e3f6fa;
  --hero: #0b1430;
  --radius: 12px;
  --shadow: 0 1px 2px rgba(15, 23, 42, .05), 0 4px 16px rgba(15, 23, 42, .05);
  --font: 'IBM Plex Sans Thai', 'Noto Sans Thai', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --mono: ui-monospace, 'Cascadia Mono', Consolas, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0b1020; --surface: #121a2e; --surface-2: #0f1628; --border: #24304b; --text: #e6ebf5; --muted: #93a1bd;
    --primary: #2b93f5; --primary-600: #1a7fe0; --primary-50: #16244a; --success-50: #0f2a1c; --warn-50: #2e2210; --danger-50: #2e1416; --info-50: #0d2830;
    --hero: #070c1c; --shadow: 0 1px 2px rgba(0,0,0,.3), 0 4px 16px rgba(0,0,0,.25); color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0b1020; --surface: #121a2e; --surface-2: #0f1628; --border: #24304b; --text: #e6ebf5; --muted: #93a1bd;
  --primary: #2b93f5; --primary-600: #1a7fe0; --primary-50: #16244a; --success-50: #0f2a1c; --warn-50: #2e2210; --danger-50: #2e1416; --info-50: #0d2830;
  --hero: #070c1c; --shadow: 0 1px 2px rgba(0,0,0,.3), 0 4px 16px rgba(0,0,0,.25); color-scheme: dark;
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body { font-family: var(--font); background: var(--bg); color: var(--text); font-size: 15px; line-height: 1.55; -webkit-font-smoothing: antialiased; }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3, h4 { margin: 0 0 .5em; line-height: 1.25; font-weight: 600; }
h1 { font-size: 1.6rem; } h2 { font-size: 1.25rem; } h3 { font-size: 1.05rem; }
p { margin: 0 0 .8em; }
code, .mono { font-family: var(--mono); font-size: .92em; }
.muted { color: var(--muted); }
.small { font-size: .86rem; }
.right { text-align: right; }
.nowrap { white-space: nowrap; }
.hidden { display: none !important; }
.row { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.row.between { justify-content: space-between; }
.stack > * + * { margin-top: 16px; }
.grid { display: grid; gap: 16px; }
.grid.c2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid.c3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid.c4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
@media (max-width: 900px) { .grid.c3, .grid.c4 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 620px) { .grid.c2, .grid.c3, .grid.c4 { grid-template-columns: 1fr; } }

/* ---------- buttons & forms ---------- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; border: 1px solid var(--border); background: var(--surface); color: var(--text);
  padding: 8px 14px; border-radius: 9px; font: inherit; font-weight: 500; cursor: pointer; transition: background .15s, border-color .15s; white-space: nowrap; }
.btn:hover { background: var(--surface-2); text-decoration: none; }
.btn:disabled { opacity: .55; cursor: not-allowed; }
.btn.primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn.primary:hover { background: var(--primary-600); }
.btn.danger { color: var(--danger); border-color: color-mix(in srgb, var(--danger) 35%, var(--border)); }
.btn.danger:hover { background: var(--danger-50); }
.btn.danger.solid { background: var(--danger); color: #fff; border-color: var(--danger); }
.btn.ghost { border-color: transparent; background: transparent; }
.btn.sm { padding: 5px 10px; font-size: .86rem; border-radius: 7px; }
.btn.lg { padding: 12px 22px; font-size: 1.02rem; border-radius: 11px; }
.btn.block { width: 100%; }
label { display: block; font-weight: 500; margin-bottom: 6px; font-size: .92rem; }
.field { margin-bottom: 14px; }
.field .hint { font-size: .82rem; color: var(--muted); margin-top: 4px; }
input[type=text], input[type=email], input[type=password], input[type=number], input[type=tel], input[type=search], select, textarea {
  width: 100%; padding: 9px 12px; border: 1px solid var(--border); border-radius: 9px; background: var(--surface); color: var(--text); font: inherit; outline: none; }
input:focus, select:focus, textarea:focus { border-color: var(--primary); box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary) 18%, transparent); }
textarea { min-height: 90px; resize: vertical; }
input[type=range] { width: 100%; accent-color: var(--primary); }
.check { display: flex; align-items: center; gap: 8px; font-weight: 400; cursor: pointer; }
.check input { width: 16px; height: 16px; accent-color: var(--primary); }
.input-group { display: flex; }
.input-group input { border-top-right-radius: 0; border-bottom-right-radius: 0; }
.input-group .btn { border-top-left-radius: 0; border-bottom-left-radius: 0; border-left: 0; }

/* ---------- cards / tables ---------- */
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 20px; }
.card.flush { padding: 0; overflow: hidden; }
.card-h { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 14px; flex-wrap: wrap; }
.card-h h2, .card-h h3 { margin: 0; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: .92rem; }
th, td { padding: 10px 14px; text-align: left; border-bottom: 1px solid var(--border); vertical-align: middle; }
th { font-weight: 600; color: var(--muted); font-size: .82rem; background: var(--surface-2); white-space: nowrap; }
tr:last-child td { border-bottom: 0; }
tbody tr:hover td { background: color-mix(in srgb, var(--primary-50) 40%, transparent); }
.empty { padding: 36px 16px; text-align: center; color: var(--muted); }
.kv { display: grid; grid-template-columns: 140px 1fr; gap: 8px 14px; font-size: .94rem; }
.kv dt { color: var(--muted); }
.kv dd { margin: 0; word-break: break-all; }

.badge { display: inline-flex; align-items: center; gap: 5px; padding: 2px 9px; border-radius: 99px; font-size: .78rem; font-weight: 600; white-space: nowrap; background: var(--surface-2); color: var(--muted); border: 1px solid var(--border); }
.badge.success { background: var(--success-50); color: var(--success); border-color: transparent; }
.badge.warn { background: var(--warn-50); color: var(--warn); border-color: transparent; }
.badge.danger { background: var(--danger-50); color: var(--danger); border-color: transparent; }
.badge.info { background: var(--info-50); color: var(--info); border-color: transparent; }
.badge.primary { background: var(--primary-50); color: var(--primary); border-color: transparent; }
.dot { width: 8px; height: 8px; border-radius: 50%; background: currentColor; display: inline-block; }
.dot.pulse { animation: pulse 1.4s infinite; }
@keyframes pulse { 50% { opacity: .3; } }

.stat { padding: 18px; }
.stat .label { color: var(--muted); font-size: .85rem; }
.stat .value { font-size: 1.6rem; font-weight: 600; margin-top: 4px; font-variant-numeric: tabular-nums; }
.stat .sub { font-size: .82rem; color: var(--muted); }

.alert { padding: 12px 16px; border-radius: 10px; border: 1px solid transparent; font-size: .93rem; }
.alert.info { background: var(--info-50); color: var(--info); }
.alert.warn { background: var(--warn-50); color: var(--warn); }
.alert.danger { background: var(--danger-50); color: var(--danger); }
.alert.success { background: var(--success-50); color: var(--success); }

/* ---------- public layout ---------- */
.topbar { position: sticky; top: 0; z-index: 20; background: color-mix(in srgb, var(--surface) 88%, transparent); backdrop-filter: blur(10px); border-bottom: 1px solid var(--border); }
.topbar .in { max-width: 1160px; margin: 0 auto; padding: 12px 16px; display: flex; align-items: center; gap: 16px; }
.brand { display: flex; align-items: center; gap: 9px; font-weight: 700; font-size: 1.1rem; color: var(--text); white-space: nowrap; }
.brand:hover { text-decoration: none; }
.brand .logo-img { height: 36px; width: auto; display: block; }
.side .brand .logo-img { height: 44px; }
.hero-logo { height: 110px; width: auto; display: block; margin-bottom: 18px; filter: drop-shadow(0 6px 24px rgba(0, 120, 228, .35)); }
@media (max-width: 620px) { .hero-logo { height: 78px; } }
.topbar nav { display: flex; gap: 4px; margin-left: auto; align-items: center; }
.topbar nav a:not(.btn) { color: var(--muted); padding: 6px 10px; border-radius: 8px; }
.topbar nav a:not(.btn):hover { color: var(--text); background: var(--surface-2); text-decoration: none; }
.container { max-width: 1160px; margin: 0 auto; padding: 24px 16px 64px; }
.hero { background: radial-gradient(1200px 400px at 70% -10%, #0078e455, transparent), var(--hero); color: #e8edff; }
.hero .in { max-width: 1160px; margin: 0 auto; padding: 72px 16px 80px; display: grid; grid-template-columns: 1.2fr 1fr; gap: 40px; align-items: center; }
.hero h1 { font-size: 2.6rem; color: #fff; margin-bottom: 14px; }
.hero p { color: #b9c4e6; font-size: 1.1rem; max-width: 560px; }
.hero .feat { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.hero .feat div { background: #ffffff0d; border: 1px solid #ffffff1a; border-radius: 12px; padding: 14px; font-size: .92rem; color: #cfd8f5; }
.hero .feat b { display: block; color: #fff; margin-bottom: 2px; }
@media (max-width: 860px) { .hero .in { grid-template-columns: 1fr; padding: 48px 16px; } .hero h1 { font-size: 2rem; } }
@media (max-width: 620px) { .hide-sm { display: none !important; } .hero .feat { grid-template-columns: 1fr; } .topbar .brand { font-size: 1rem; } }
.section { padding: 56px 0 8px; }
.section h2 { font-size: 1.6rem; text-align: center; }
.section > p.muted { text-align: center; margin-bottom: 28px; }
.plans { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 16px; }
.plan { position: relative; display: flex; flex-direction: column; gap: 10px; }
.plan.featured { border-color: var(--primary); box-shadow: 0 0 0 1px var(--primary), var(--shadow); }
.plan .tag { position: absolute; top: -11px; right: 16px; background: var(--primary); color: #fff; font-size: .75rem; padding: 2px 10px; border-radius: 99px; }
.plan .price { font-size: 1.9rem; font-weight: 700; }
.plan .price small { font-size: .9rem; color: var(--muted); font-weight: 400; }
.plan ul { list-style: none; padding: 0; margin: 0 0 6px; display: grid; gap: 6px; font-size: .93rem; }
.plan ul li::before { content: '✓'; color: var(--success); font-weight: 700; margin-right: 8px; }
.plan .spacer { flex: 1; }
.footer { border-top: 1px solid var(--border); padding: 26px 16px; text-align: center; color: var(--muted); font-size: .88rem; }
.auth-wrap { min-height: calc(100vh - 60px); display: grid; place-items: center; padding: 32px 16px; }
.auth-card { width: 100%; max-width: 420px; }

/* ---------- app layout ---------- */
.shell { display: grid; grid-template-columns: 240px 1fr; min-height: 100vh; }
.side { background: var(--surface); border-right: 1px solid var(--border); padding: 16px 12px; position: sticky; top: 0; height: 100vh; overflow-y: auto; display: flex; flex-direction: column; }
.side .brand { padding: 4px 8px 16px; }
.side nav { display: grid; gap: 2px; }
.side nav a { display: flex; align-items: center; gap: 10px; padding: 9px 12px; border-radius: 9px; color: var(--muted); font-weight: 500; }
.side nav a:hover { background: var(--surface-2); color: var(--text); text-decoration: none; }
.side nav a.active { background: var(--primary-50); color: var(--primary); }
.side nav .sep { font-size: .74rem; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); padding: 16px 12px 6px; }
.side .count { margin-left: auto; background: var(--danger); color: #fff; border-radius: 99px; font-size: .72rem; padding: 0 7px; }
.side .foot { margin-top: auto; padding-top: 16px; }
.balance-box { background: linear-gradient(135deg, #0078e4, #0b3d91); color: #fff; border-radius: 12px; padding: 14px; margin-bottom: 10px; }
.balance-box .l { font-size: .8rem; opacity: .85; }
.balance-box .v { font-size: 1.35rem; font-weight: 700; }
.balance-box a { color: #fff; font-size: .85rem; text-decoration: underline; }
.main { min-width: 0; }
.main-top { display: flex; align-items: center; gap: 12px; padding: 14px 28px; border-bottom: 1px solid var(--border); background: var(--surface); position: sticky; top: 0; z-index: 10; }
.main-top .who { margin-left: auto; display: flex; align-items: center; gap: 10px; color: var(--muted); font-size: .9rem; }
.main-body { padding: 26px 28px 60px; max-width: 1240px; }
.menu-btn { display: none; }
.page-h { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 20px; flex-wrap: wrap; }
.page-h h1 { margin: 0; }
@media (max-width: 900px) {
  .shell { grid-template-columns: 1fr; }
  .side { position: fixed; z-index: 50; left: 0; top: 0; width: 260px; transform: translateX(-100%); transition: transform .2s; box-shadow: var(--shadow); }
  .side.open { transform: none; }
  .menu-btn { display: inline-flex; }
  .main-top { padding: 12px 16px; }
  .main-body { padding: 18px 16px 50px; }
}

/* ---------- order ---------- */
.order-grid { display: grid; grid-template-columns: 1fr 340px; gap: 20px; align-items: start; }
@media (max-width: 980px) { .order-grid { grid-template-columns: 1fr; } }
.sticky { position: sticky; top: 80px; }
.pick { display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 12px; }
.pick-item { border: 1.5px solid var(--border); border-radius: 11px; padding: 14px; cursor: pointer; background: var(--surface); transition: border-color .15s, background .15s; }
.pick-item:hover { border-color: color-mix(in srgb, var(--primary) 50%, var(--border)); }
.pick-item.on { border-color: var(--primary); background: var(--primary-50); }
.pick-item .t { font-weight: 600; }
.pick-item .s { font-size: .86rem; color: var(--muted); }
.pick-item .p { font-weight: 700; margin-top: 6px; }
.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--border); margin-bottom: 16px; overflow-x: auto; }
.tabs button { background: none; border: 0; padding: 10px 14px; font: inherit; color: var(--muted); cursor: pointer; border-bottom: 2px solid transparent; margin-bottom: -1px; white-space: nowrap; }
.tabs button.on { color: var(--primary); border-bottom-color: var(--primary); font-weight: 600; }
.slider-row { display: grid; grid-template-columns: 90px 1fr 110px; gap: 14px; align-items: center; margin-bottom: 14px; }
.slider-row .v { font-weight: 600; text-align: right; font-variant-numeric: tabular-nums; }
.sum-line { display: flex; justify-content: space-between; padding: 6px 0; font-size: .94rem; }
.sum-total { display: flex; justify-content: space-between; border-top: 1px solid var(--border); margin-top: 8px; padding-top: 12px; font-size: 1.15rem; font-weight: 700; }

/* ---------- vps detail ---------- */
.vps-head { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.vps-head .os { width: 46px; height: 46px; border-radius: 12px; background: var(--primary-50); color: var(--primary); display: grid; place-items: center; font-weight: 700; }
.power-bar { display: flex; gap: 8px; flex-wrap: wrap; }
.meter { height: 8px; background: var(--surface-2); border: 1px solid var(--border); border-radius: 99px; overflow: hidden; margin-top: 6px; }
.meter > span { display: block; height: 100%; background: var(--primary); border-radius: 99px; transition: width .4s; }
.spark { width: 100%; height: 70px; display: block; }
.secret { display: inline-flex; align-items: center; gap: 6px; }
.copy { cursor: pointer; color: var(--muted); border: 0; background: none; padding: 2px 4px; font-size: .85rem; }
.copy:hover { color: var(--primary); }
.vps-list .vps-row { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr auto; gap: 12px; align-items: center; padding: 14px 18px; border-bottom: 1px solid var(--border); color: var(--text); }
.vps-list .vps-row:hover { background: var(--surface-2); text-decoration: none; }
.vps-list .vps-row:last-child { border-bottom: 0; }
@media (max-width: 760px) { .vps-list .vps-row { grid-template-columns: 1fr auto; } .vps-list .vps-row .hide-sm { display: none; } }

/* ---------- top-up ---------- */
.qr-box { text-align: center; }
.qr-box img { width: 280px; max-width: 100%; border-radius: 12px; border: 1px solid var(--border); background: #fff; padding: 6px; }
.qr-amount { font-size: 2rem; font-weight: 700; }
.drop { border: 2px dashed var(--border); border-radius: 12px; padding: 26px; text-align: center; cursor: pointer; transition: border-color .15s, background .15s; }
.drop:hover, .drop.over { border-color: var(--primary); background: var(--primary-50); }
.drop img { max-height: 220px; max-width: 100%; border-radius: 8px; margin-top: 10px; }
.amount-quick { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 10px; }
.pp-head { background: #113566; color: #fff; padding: 10px; border-radius: 10px 10px 0 0; font-weight: 600; letter-spacing: .02em; }

/* ---------- overlays ---------- */
.modal-bg { position: fixed; inset: 0; background: rgba(5, 10, 25, .55); display: grid; place-items: center; z-index: 100; padding: 16px; animation: fade .12s; }
.modal { background: var(--surface); border-radius: 14px; width: 100%; max-width: 520px; max-height: 92vh; overflow-y: auto; box-shadow: 0 20px 60px rgba(0,0,0,.3); }
.modal.wide { max-width: 780px; }
.modal .mh { padding: 18px 20px 0; display: flex; justify-content: space-between; align-items: center; }
.modal .mh h3 { margin: 0; }
.modal .mb { padding: 16px 20px; }
.modal .mf { padding: 0 20px 18px; display: flex; gap: 8px; justify-content: flex-end; flex-wrap: wrap; }
@keyframes fade { from { opacity: 0; } }
#toasts { position: fixed; right: 16px; bottom: 16px; z-index: 200; display: grid; gap: 8px; max-width: min(380px, calc(100vw - 32px)); }
.toast { background: var(--text); color: var(--bg); padding: 11px 16px; border-radius: 10px; box-shadow: var(--shadow); font-size: .92rem; animation: fade .15s; }
.toast.error { background: var(--danger); color: #fff; }
.toast.success { background: var(--success); color: #fff; }
.spinner { width: 18px; height: 18px; border: 2px solid currentColor; border-right-color: transparent; border-radius: 50%; display: inline-block; animation: spin .7s linear infinite; vertical-align: -3px; }
@keyframes spin { to { transform: rotate(360deg); } }
.loading { padding: 60px; text-align: center; color: var(--muted); }
.bars { display: flex; align-items: flex-end; gap: 6px; height: 140px; }
.bars .b { flex: 1; background: var(--primary); border-radius: 4px 4px 0 0; min-height: 2px; position: relative; opacity: .85; }
.bars .b:hover { opacity: 1; }
.bars-x { display: flex; gap: 6px; font-size: .7rem; color: var(--muted); margin-top: 4px; }
.bars-x span { flex: 1; text-align: center; }
.checklist { display: grid; gap: 8px; }
.checklist div { display: flex; gap: 8px; align-items: center; font-size: .92rem; }
.filters { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 14px; }
.filters input, .filters select { width: auto; min-width: 180px; }