:root {
  --bg:      #0f0f10;
  --surface: #1a1a1b;
  --border:  #2e2e30;
  --text:    #e8e8ea;
  --muted:   #6b7280;
  --accent:  #6366f1;
  --accent-h:#4f46e5;
  --danger:  #ef4444;
  --success: #22c55e;
  --warn:    #f59e0b;
  --r:       8px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: 'Segoe UI', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  font-size: 14px;
}

/* ── Buttons ─────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--accent); color: #fff; border: none;
  border-radius: var(--r); padding: .65rem 1.2rem;
  font-size: .875rem; cursor: pointer; transition: background .15s, opacity .15s;
  width: 100%; white-space: nowrap;
}
.btn:hover    { background: var(--accent-h); }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn-sm       { width: auto; padding: .35rem .75rem; font-size: .78rem; }
.btn-ghost    { background: transparent; border: 1px solid var(--border); color: var(--text); }
.btn-ghost:hover { background: var(--surface); }
.btn-danger   { background: rgba(239,68,68,.12); color: var(--danger); border: 1px solid rgba(239,68,68,.25); }
.btn-danger:hover { background: var(--danger); color: #fff; }

/* ── Forms ───────────────────────────────────── */
.form-group { margin-bottom: 1rem; }
label {
  display: block; font-size: .72rem; color: var(--muted);
  text-transform: uppercase; letter-spacing: .05em; margin-bottom: .35rem;
}
input {
  width: 100%; background: var(--bg); border: 1px solid var(--border);
  border-radius: var(--r); color: var(--text);
  padding: .6rem .85rem; font-size: .875rem; outline: none; transition: border-color .15s;
}
input:focus  { border-color: var(--accent); }
input[type="number"] { -moz-appearance: textfield; appearance: textfield; }
.err { color: var(--danger); font-size: .8rem; margin-top: .5rem; display: none; }

/* ── Auth ────────────────────────────────────── */
#auth-view {
  display: flex; align-items: center; justify-content: center;
  min-height: 100vh; padding: 1rem;
}
.auth-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--r); padding: 2rem; width: 100%; max-width: 400px;
}
.auth-card h1  { font-size: 1.35rem; margin-bottom: .2rem; }
.auth-card .sub { color: var(--muted); font-size: .85rem; margin-bottom: 1.5rem; }

.tabs { display: flex; border-bottom: 1px solid var(--border); margin-bottom: 1.5rem; }
.tab-btn {
  background: none; border: none; color: var(--muted);
  padding: .5rem 1rem; cursor: pointer; font-size: .875rem;
  border-bottom: 2px solid transparent; margin-bottom: -1px; transition: color .15s;
}
.tab-btn.active { color: var(--text); border-bottom-color: var(--accent); }

/* ── Topbar ──────────────────────────────────── */
#dash-view { display: none; }
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: .85rem 1.5rem; border-bottom: 1px solid var(--border); background: var(--surface);
  position: sticky; top: 0; z-index: 10;
}
.brand { font-weight: 700; font-size: 1rem; }
.brand span { color: var(--accent); }
.topbar-right { display: flex; align-items: center; gap: .75rem; }

/* ── Badges / Pills ──────────────────────────── */
.badge, .pill {
  display: inline-block; font-size: .68rem; padding: .15rem .55rem;
  border-radius: 99px; font-weight: 600; text-transform: uppercase; letter-spacing: .04em;
}
.bg-admin { background: #2e1065; color: #a78bfa; }
.bg-user  { background: #0c2556; color: #60a5fa; }
.bg-green { background: #052e16; color: #4ade80; }
.bg-red   { background: #2d0909; color: #f87171; }
.bg-warn  { background: #2d1a00; color: #fbbf24; }

/* ── Main layout ─────────────────────────────── */
.main {
  max-width: 960px; margin: 0 auto; padding: 2rem 1.5rem;
}

.pg-title { font-size: 1.2rem; font-weight: 600; margin-bottom: .15rem; }
.pg-sub   { color: var(--muted); font-size: .85rem; margin-bottom: 1.75rem; }

.nav-tabs { display: flex; border-bottom: 1px solid var(--border); margin-bottom: 2rem; }
.nav-tab {
  background: none; border: none; color: var(--muted); padding: .6rem 1.25rem;
  cursor: pointer; font-size: .85rem; border-bottom: 2px solid transparent; margin-bottom: -1px;
}
.nav-tab.active { color: var(--text); border-bottom-color: var(--accent); }

.panel      { display: none; }
.panel.show { display: block; }

/* ── Stats grid ──────────────────────────────── */
.stats-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1rem; margin-bottom: 1.5rem;
}
.stat-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--r); padding: 1.2rem;
}
.stat-label { font-size: .7rem; color: var(--muted); text-transform: uppercase; letter-spacing: .05em; margin-bottom: .45rem; }
.stat-value { font-size: 1.75rem; font-weight: 700; line-height: 1; }
/* stat-sub: small hint line beneath the main number */
.stat-sub   { font-size: .7rem; color: var(--muted); margin-top: .35rem; }
.c-green  { color: var(--success); }
.c-red    { color: var(--danger); }
.c-accent { color: var(--accent); }

/* ── Quota bar ───────────────────────────────── */
.quota-wrap {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--r); padding: 1.2rem; margin-bottom: 1.5rem;
}
.quota-hdr   { display: flex; justify-content: space-between; font-size: .8rem; margin-bottom: .75rem; }
.bar-track   { background: var(--border); border-radius: 99px; height: 8px; overflow: hidden; }
.bar-fill    { height: 100%; border-radius: 99px; background: var(--success); transition: width .5s ease; }
.bar-fill.w  { background: var(--warn); }
.bar-fill.d  { background: var(--danger); }

/* ── Charts grid ─────────────────────────────── */
/* Two side-by-side chart cards on desktop, stacked on mobile */
.charts-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 1.5rem;
}
@media (max-width: 640px) { .charts-grid { grid-template-columns: 1fr; } }
.chart-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--r); padding: 1.2rem;
}
.chart-title {
  font-size: .72rem; color: var(--muted);
  text-transform: uppercase; letter-spacing: .05em;
  margin-bottom: .85rem;
}
.chart-empty {
  font-size: .78rem; color: var(--muted);
  text-align: center; padding: 1rem 0;
}

/* ── Password strength meter ─────────────────── */
.strength-bar-wrap {
  height: 4px; background: var(--border); border-radius: 99px;
  margin-top: .45rem; overflow: hidden;
}
.strength-bar {
  height: 100%; width: 0; border-radius: 99px;
  transition: width .25s ease, background .25s ease;
}
.strength-bar.bar-weak   { background: var(--danger); }
.strength-bar.bar-fair   { background: var(--warn); }
.strength-bar.bar-strong { background: var(--success); }
.strength-label { font-size: .7rem; margin-top: .3rem; }
.strength-label.bar-weak   { color: var(--danger); }
.strength-label.bar-fair   { color: var(--warn); }
.strength-label.bar-strong { color: var(--success); }

/* ── Info card ───────────────────────────────── */
.info-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--r); }
.info-row  { display: flex; justify-content: space-between; align-items: center; padding: .65rem 1rem; font-size: .85rem; border-bottom: 1px solid var(--border); }
.info-row:last-child { border-bottom: none; }
.info-row .k { color: var(--muted); }

/* ── Table ───────────────────────────────────── */
.section-hdr {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 1rem;
}
.section-title { font-size: .9rem; font-weight: 600; }

.table-wrap { background: var(--surface); border: 1px solid var(--border); border-radius: var(--r); overflow: auto; }
table  { width: 100%; border-collapse: collapse; font-size: .83rem; min-width: 640px; }
th     { text-align: left; padding: .65rem 1rem; font-size: .68rem; color: var(--muted); text-transform: uppercase; letter-spacing: .05em; border-bottom: 1px solid var(--border); white-space: nowrap; }
td     { padding: .65rem 1rem; border-bottom: 1px solid var(--border); vertical-align: middle; }
tr:last-child td { border-bottom: none; }
tr:hover td { background: rgba(255,255,255,.02); }
.empty { text-align: center; padding: 2rem 1rem; color: var(--muted); }

/* ── Stress Test panel ───────────────────────────────────────────── */
.stress-controls {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--r); padding: 1.2rem; margin-bottom: 1.5rem;
}
.stress-row { display: flex; gap: 1rem; align-items: flex-end; flex-wrap: wrap; }
.stress-detail-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem; margin-top: 1rem;
}
.stress-block {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--r); padding: 1rem;
}
.stress-block-title {
  font-size: .7rem; color: var(--accent); text-transform: uppercase;
  letter-spacing: .08em; font-weight: 700; margin-bottom: .75rem;
}
.stress-block-row {
  display: flex; justify-content: space-between; align-items: center;
  font-size: .83rem; padding: .25rem 0; border-bottom: 1px solid var(--border);
}
.stress-block-row:last-child { border-bottom: none; }
select {
  width: 100%; background: var(--bg); border: 1px solid var(--border);
  border-radius: var(--r); color: var(--text);
  padding: .6rem .85rem; font-size: .875rem; outline: none; transition: border-color .15s;
  appearance: none; cursor: pointer;
}
select:focus { border-color: var(--accent); }

/* ── Modal ───────────────────────────────────── */
.modal-overlay {
  display: none; position: fixed; inset: 0;
  background: rgba(0,0,0,.65); z-index: 200;
  align-items: center; justify-content: center; padding: 1rem;
}
.modal-overlay.open { display: flex; }

.modal {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--r); width: 100%; max-width: 440px;
  animation: fadeUp .18s ease;
}
.modal-wide { max-width: 720px; }

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

.modal-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 1rem 1.25rem; border-bottom: 1px solid var(--border); font-size: .9rem;
}
.modal-close {
  background: none; border: none; color: var(--muted);
  font-size: 1.1rem; cursor: pointer; line-height: 1; padding: 0 .2rem;
}
.modal-close:hover { color: var(--text); }

.modal-body   { padding: 1.25rem; }
.modal-footer {
  display: flex; justify-content: flex-end; gap: .5rem;
  padding: .85rem 1.25rem; border-top: 1px solid var(--border);
}