/* NexGuard Web — premium theme. Light + dark, exact brand palette. */
:root {
  --primary: #173D82;
  --primary-600: #1c4a9e;
  --secondary: #367DEB;
  --bg: #F6F8FC;
  --surface: #FFFFFF;
  --surface-2: #EEF2F9;
  --text: #172033;
  --muted: #5B6472;
  --border: #E2E8F0;
  --success: #16A878;
  --danger: #DC4C4C;
  --warning: #F59E0B;
  --info: #367DEB;
  --risk-low: #16A878;
  --risk-medium: #F59E0B;
  --risk-high: #DC4C4C;
  --risk-unknown: #94A3B8;
  --radius: 14px;
  --radius-sm: 10px;
  --radius-lg: 20px;
  --shadow: 0 1px 2px rgba(23,32,51,.04), 0 8px 24px rgba(23,32,51,.06);
  --sidebar-w: 244px;
  --font: "Plus Jakarta Sans", -apple-system, "Segoe UI", Roboto, "Noto Sans Bengali", system-ui, sans-serif;
}
:root[data-theme="dark"], :root.dark {
  --primary: #4F8CFF;
  --primary-600: #6a9dff;
  --secondary: #367DEB;
  --bg: #0B1020;
  --surface: #182235;
  --surface-2: #121A2A;
  --text: #F8FAFC;
  --muted: #94A3B8;
  --border: #25324A;
  --shadow: 0 1px 2px rgba(0,0,0,.3), 0 10px 30px rgba(0,0,0,.35);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --primary: #4F8CFF; --primary-600: #6a9dff; --bg: #0B1020; --surface: #182235;
    --surface-2: #121A2A; --text: #F8FAFC; --muted: #94A3B8; --border: #25324A;
    --shadow: 0 1px 2px rgba(0,0,0,.3), 0 10px 30px rgba(0,0,0,.35);
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  font-size: 14.5px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--secondary); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; }
h1,h2,h3,h4 { line-height: 1.2; margin: 0 0 .5em; font-weight: 700; }
h1 { font-size: 1.6rem; } h2 { font-size: 1.25rem; } h3 { font-size: 1.05rem; }
.muted { color: var(--muted); }
.small { font-size: 12.5px; }
hr { border: 0; border-top: 1px solid var(--border); margin: 20px 0; }

/* ── Buttons ─────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 11px 18px; border-radius: var(--radius-sm); border: 1px solid transparent;
  font: inherit; font-weight: 600; cursor: pointer; text-decoration: none;
  background: var(--surface-2); color: var(--text); transition: .15s;
}
.btn:hover { text-decoration: none; filter: brightness(.97); }
.btn svg { width: 18px; height: 18px; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-600); filter: none; }
.btn-outline { background: transparent; border-color: var(--border); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-ghost { background: transparent; }
.btn-block { width: 100%; }
.btn-sm { padding: 7px 12px; font-size: 13px; border-radius: 8px; }
.btn[disabled] { opacity: .55; cursor: not-allowed; }

/* ── Cards ───────────────────────────────────────────────────────────────── */
.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow);
}
.card + .card { margin-top: 16px; }
.card-tight { padding: 14px; }
.card-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 14px; }

/* ── Forms ───────────────────────────────────────────────────────────────── */
label { display: block; font-weight: 600; font-size: 13px; margin: 14px 0 6px; }
label:first-child { margin-top: 0; }
input, select, textarea {
  width: 100%; padding: 11px 13px; border: 1px solid var(--border);
  border-radius: var(--radius-sm); background: var(--surface); color: var(--text);
  font: inherit; transition: .15s;
}
input:focus, select:focus, textarea:focus {
  outline: none; border-color: var(--secondary);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--secondary) 18%, transparent);
}
textarea { min-height: 96px; resize: vertical; }
.field-row { display: flex; gap: 14px; }
.field-row > * { flex: 1; }
.help { font-size: 12px; color: var(--muted); margin-top: 5px; }
.input-error { border-color: var(--danger); }

/* ── Flash / alerts ──────────────────────────────────────────────────────── */
.flash { padding: 12px 15px; border-radius: var(--radius-sm); margin-bottom: 14px; font-size: 13.5px; display: flex; gap: 10px; align-items: flex-start; }
.flash svg { width: 18px; height: 18px; flex-shrink: 0; margin-top: 1px; }
.flash-success { background: color-mix(in srgb, var(--success) 12%, var(--surface)); color: var(--success); border: 1px solid color-mix(in srgb, var(--success) 30%, transparent); }
.flash-error { background: color-mix(in srgb, var(--danger) 12%, var(--surface)); color: var(--danger); border: 1px solid color-mix(in srgb, var(--danger) 30%, transparent); }
.flash-info { background: color-mix(in srgb, var(--info) 12%, var(--surface)); color: var(--info); border: 1px solid color-mix(in srgb, var(--info) 30%, transparent); }

/* ── Badges / chips ──────────────────────────────────────────────────────── */
.badge { display: inline-flex; align-items: center; gap: 5px; padding: 3px 10px; border-radius: 999px; font-size: 12px; font-weight: 600; background: var(--surface-2); }
.badge-success { background: color-mix(in srgb, var(--success) 15%, transparent); color: var(--success); }
.badge-danger { background: color-mix(in srgb, var(--danger) 15%, transparent); color: var(--danger); }
.badge-warning { background: color-mix(in srgb, var(--warning) 18%, transparent); color: var(--warning); }
.badge-info { background: color-mix(in srgb, var(--info) 15%, transparent); color: var(--info); }
.chip { padding: 8px 14px; border-radius: 999px; border: 1px solid var(--border); background: var(--surface); cursor: pointer; font-size: 13px; font-weight: 600; user-select: none; }
.chip.active { background: var(--primary); color: #fff; border-color: var(--primary); }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }

/* ── Tables ──────────────────────────────────────────────────────────────── */
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); }
table.data { width: 100%; border-collapse: collapse; font-size: 13.5px; }
table.data th { text-align: left; padding: 12px 14px; color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: .03em; border-bottom: 1px solid var(--border); background: var(--surface-2); }
table.data td { padding: 12px 14px; border-bottom: 1px solid var(--border); }
table.data tr:last-child td { border-bottom: 0; }
table.data tr:hover td { background: var(--surface-2); }

/* ── Grid helpers ────────────────────────────────────────────────────────── */
.grid { display: grid; gap: 16px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.row { display: flex; gap: 14px; align-items: center; }
.between { justify-content: space-between; }
.stack > * + * { margin-top: 12px; }
.mt { margin-top: 16px; } .mt-lg { margin-top: 28px; } .mb { margin-bottom: 16px; }

/* ── Stat tiles ──────────────────────────────────────────────────────────── */
.stat { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; }
.stat .ico { width: 34px; height: 34px; border-radius: 9px; display: grid; place-items: center; background: color-mix(in srgb, var(--primary) 12%, transparent); color: var(--primary); margin-bottom: 10px; }
.stat .val { font-size: 1.35rem; font-weight: 800; }
.stat .lbl { color: var(--muted); font-size: 12.5px; }

/* ── Balance / hero card ─────────────────────────────────────────────────── */
.hero-card {
  border-radius: var(--radius-lg); padding: 24px; color: #fff;
  background: linear-gradient(135deg, #173D82, #367DEB);
}
.hero-card .amt { font-size: 2rem; font-weight: 800; }

/* ── App shell ───────────────────────────────────────────────────────────── */
.shell { display: flex; min-height: 100vh; }
.sidebar {
  width: var(--sidebar-w); flex-shrink: 0; background: var(--surface);
  border-right: 1px solid var(--border); padding: 18px 12px; position: sticky; top: 0; height: 100vh; overflow-y: auto;
}
.sidebar .brand { display: flex; align-items: center; gap: 9px; font-weight: 800; font-size: 17px; padding: 6px 10px 16px; color: var(--text); }
.sidebar .brand svg { width: 26px; height: 26px; color: var(--primary); }
.nav a { display: flex; align-items: center; gap: 11px; padding: 10px 12px; border-radius: 10px; color: var(--muted); font-weight: 600; font-size: 13.5px; margin-bottom: 2px; }
.nav a:hover { background: var(--surface-2); color: var(--text); text-decoration: none; }
.nav a.active { background: color-mix(in srgb, var(--primary) 12%, transparent); color: var(--primary); }
.nav a svg { width: 19px; height: 19px; }
.nav .sec { font-size: 11px; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); padding: 16px 12px 6px; }
.main { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.topbar { display: flex; align-items: center; justify-content: space-between; padding: 14px 26px; border-bottom: 1px solid var(--border); background: var(--surface); position: sticky; top: 0; z-index: 10; }
.topbar .page-title { font-weight: 700; font-size: 15px; }
.topbar .actions { display: flex; align-items: center; gap: 10px; }
.icon-btn { width: 38px; height: 38px; border-radius: 10px; border: 1px solid var(--border); background: var(--surface); display: grid; place-items: center; cursor: pointer; color: var(--text); position: relative; }
.icon-btn .dot { position: absolute; top: 6px; right: 6px; min-width: 16px; height: 16px; padding: 0 4px; border-radius: 999px; background: var(--danger); color: #fff; font-size: 10px; font-weight: 700; display: grid; place-items: center; }
.content { padding: 26px; max-width: 1100px; width: 100%; margin: 0 auto; }
.menu-toggle { display: none; }
.avatar { width: 36px; height: 36px; border-radius: 50%; background: color-mix(in srgb, var(--primary) 15%, transparent); color: var(--primary); display: grid; place-items: center; font-weight: 700; font-size: 13px; }

/* ── Auth shell ──────────────────────────────────────────────────────────── */
.auth-wrap { min-height: 100vh; display: grid; place-items: center; padding: 24px; }
.auth-card { width: 100%; max-width: 400px; }
.auth-card .brand { display: flex; align-items: center; justify-content: center; gap: 9px; font-weight: 800; font-size: 20px; color: var(--primary); margin-bottom: 4px; }
.auth-card .brand svg { width: 30px; height: 30px; }

/* ── Marketing ───────────────────────────────────────────────────────────── */
.mkt-nav { display: flex; align-items: center; justify-content: space-between; padding: 18px 24px; max-width: 1140px; margin: 0 auto; }
.mkt-nav .brand { display: flex; align-items: center; gap: 9px; font-weight: 800; font-size: 18px; color: var(--text); }
.mkt-nav .brand svg { width: 26px; height: 26px; color: var(--primary); }
.hero { max-width: 900px; margin: 0 auto; padding: 60px 24px; text-align: center; }
.hero h1 { font-size: clamp(2rem, 5vw, 3rem); letter-spacing: -.02em; }
.hero p.lead { font-size: 1.15rem; color: var(--muted); max-width: 620px; margin: 0 auto 28px; }
.feature-grid { max-width: 1000px; margin: 40px auto; padding: 0 24px; }
.feature { text-align: left; }
.feature .ico { width: 44px; height: 44px; border-radius: 12px; background: color-mix(in srgb, var(--primary) 12%, transparent); color: var(--primary); display: grid; place-items: center; margin-bottom: 12px; }
footer.mkt { border-top: 1px solid var(--border); padding: 30px 24px; text-align: center; color: var(--muted); font-size: 13px; }

/* ── Circular percent (fraud result) ─────────────────────────────────────── */
.ring { --p: 0; width: 168px; height: 168px; border-radius: 50%; display: grid; place-items: center;
  background: conic-gradient(var(--ring-color, var(--primary)) calc(var(--p) * 1%), var(--surface-2) 0);
  position: relative; margin: 0 auto; transition: --p 1s ease; }
.ring::before { content: ""; position: absolute; inset: 14px; background: var(--surface); border-radius: 50%; }
.ring .num { position: relative; font-size: 2.2rem; font-weight: 800; }

/* ── Progress bar ────────────────────────────────────────────────────────── */
.progress { height: 8px; background: var(--surface-2); border-radius: 999px; overflow: hidden; }
.progress > span { display: block; height: 100%; background: var(--primary); border-radius: 999px; transition: width .3s; }

/* ── Code blocks (API docs) ──────────────────────────────────────────────── */
pre.code { background: #0d1526; color: #e6edf7; padding: 16px; border-radius: var(--radius-sm); overflow-x: auto; font: 13px/1.6 ui-monospace, "SF Mono", Menlo, monospace; }
pre.code .k { color: #7ee3c7; } pre.code .s { color: #ffd479; }
.copy-btn { position: absolute; top: 10px; right: 10px; }

/* ── Empty state ─────────────────────────────────────────────────────────── */
.empty { text-align: center; padding: 48px 20px; color: var(--muted); }
.empty .ico { width: 60px; height: 60px; border-radius: 50%; background: var(--surface-2); display: grid; place-items: center; margin: 0 auto 14px; color: var(--primary); }

/* ── Modal ───────────────────────────────────────────────────────────────── */
.modal-bg { position: fixed; inset: 0; background: rgba(11,16,32,.5); display: none; place-items: center; z-index: 100; padding: 20px; }
.modal-bg.open { display: grid; }
.modal { background: var(--surface); border-radius: var(--radius-lg); padding: 24px; max-width: 440px; width: 100%; box-shadow: var(--shadow); }

/* ── Responsive ──────────────────────────────────────────────────────────── */
@media (max-width: 900px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 760px) {
  .sidebar { position: fixed; left: 0; top: 0; z-index: 50; transform: translateX(-100%); transition: .2s; box-shadow: var(--shadow); }
  .sidebar.open { transform: none; }
  .menu-toggle { display: grid; }
  .content { padding: 18px; }
  .topbar { padding: 12px 16px; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .field-row { flex-direction: column; }
}