/* =========================================================
   EXCHANGER — Dark Theme
   ========================================================= */

:root {
  --bg:           #0d1117;
  --surface:      #161b22;
  --card:         #1c2128;
  --card-hover:   #21262d;
  --border:       #30363d;
  --primary:      #238636;
  --primary-h:    #2ea043;
  --accent:       #388bfd;
  --accent-h:     #58a6ff;
  --danger:       #da3633;
  --danger-h:     #f85149;
  --warning:      #d29922;
  --warning-h:    #e3b341;
  --text:         #c9d1d9;
  --text-muted:   #8b949e;
  --text-head:    #f0f6fc;
  --green:        #3fb950;
  --blue:         #58a6ff;
  --red:          #f85149;
  --yellow:       #e3b341;
  --sidebar-w:    240px;
  --radius:       6px;
  --shadow:       0 1px 3px rgba(0,0,0,.4);
}

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

html { font-size: 15px; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-h); text-decoration: underline; }

/* ── Layout ──────────────────────────────────────────────── */
.layout {
  display: flex;
  min-height: 100vh;
}

/* ── Sidebar ─────────────────────────────────────────────── */
.sidebar {
  width: var(--sidebar-w);
  min-width: var(--sidebar-w);
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 1.25rem 1.25rem 1rem;
  border-bottom: 1px solid var(--border);
  color: var(--text-head);
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: -.3px;
}

.brand-icon { font-size: 1.3rem; color: var(--green); }

.nav-links {
  list-style: none;
  padding: 0.75rem 0;
  flex: 1;
}

.nav-links a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0.6rem 1.25rem;
  color: var(--text);
  font-size: 0.9rem;
  border-radius: 0;
  transition: background .15s, color .15s;
  text-decoration: none;
}

.nav-links a:hover { background: var(--card-hover); color: var(--text-head); }
.nav-links a.active { background: rgba(56,139,253,.15); color: var(--blue); border-left: 2px solid var(--blue); }
.nav-icon { width: 18px; text-align: center; opacity: .7; font-style: normal; }

.sidebar-footer {
  padding: 1rem 1.25rem;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 10px;
}

.user-info { flex: 1; display: flex; align-items: center; gap: 8px; min-width: 0; }
.user-avatar {
  width: 32px; height: 32px;
  background: var(--accent);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 0.85rem; color: #fff;
  flex-shrink: 0;
}
.user-details { min-width: 0; }
.user-name { display: block; font-size: 0.85rem; font-weight: 600; color: var(--text-head); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.user-role { display: block; font-size: 0.75rem; color: var(--text-muted); }

.logout-form { flex-shrink: 0; }
.btn-logout {
  background: none; border: 1px solid var(--border); color: var(--text-muted);
  cursor: pointer; padding: 6px 8px; border-radius: var(--radius);
  font-size: 1rem; transition: all .15s;
}
.btn-logout:hover { border-color: var(--danger); color: var(--danger); }

/* ── Main Content ────────────────────────────────────────── */
.main-content {
  flex: 1;
  padding: 2rem;
  min-width: 0;
  max-width: 100%;
}

/* ── Auth Layout ─────────────────────────────────────────── */
.auth-wrapper {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  padding: 2rem;
}

.auth-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2.5rem;
  width: 100%;
  max-width: 420px;
  box-shadow: var(--shadow);
}

.auth-logo { text-align: center; margin-bottom: 2rem; }
.brand-icon-lg { font-size: 3rem; color: var(--green); display: block; margin-bottom: .5rem; }
.auth-title { font-size: 1.5rem; color: var(--text-head); font-weight: 700; }
.auth-subtitle { color: var(--text-muted); font-size: 0.9rem; margin-top: 0.25rem; }

.auth-form { display: flex; flex-direction: column; gap: 1.25rem; }

/* ── Page Header ─────────────────────────────────────────── */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.page-title {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-head);
}

.page-subtitle { color: var(--text-muted); font-size: 0.9rem; }
.page-actions { display: flex; align-items: center; gap: 0.75rem; flex-wrap: wrap; }

/* ── Cards ───────────────────────────────────────────────── */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 1.5rem;
  overflow: hidden;
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border);
}

.card-title { font-weight: 600; color: var(--text-head); font-size: 0.95rem; }
.card--filters { padding: 1.25rem 1.5rem; margin-bottom: 1rem; }

/* ── Stats Grid ──────────────────────────────────────────── */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.stat-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
}

.stat-label { font-size: 0.8rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: .5px; margin-bottom: .5rem; }
.stat-value { font-size: 2rem; font-weight: 700; color: var(--text-head); line-height: 1.1; }
.stat-value--green { color: var(--green); }
.stat-value--blue { color: var(--blue); }
.stat-sub { font-size: 0.8rem; color: var(--text-muted); margin-top: .4rem; }

/* ── Tables ──────────────────────────────────────────────── */
.table-wrapper { overflow-x: auto; }

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.table th {
  background: var(--surface);
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: .5px;
  padding: 0.75rem 1rem;
  text-align: left;
  white-space: nowrap;
  border-bottom: 1px solid var(--border);
}

.table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}

.table tbody tr:last-child td { border-bottom: none; }
.table tbody tr:hover { background: rgba(255,255,255,.02); }
.table--dense td, .table--dense th { padding: 0.5rem 1rem; }
.row--inactive { opacity: .55; }

/* ── Badges ──────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: 20px;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: .3px;
  white-space: nowrap;
}

.badge--green  { background: rgba(63,185,80,.15); color: var(--green); border: 1px solid rgba(63,185,80,.3); }
.badge--blue   { background: rgba(88,166,255,.15); color: var(--blue); border: 1px solid rgba(88,166,255,.3); }
.badge--red    { background: rgba(248,81,73,.15); color: var(--red); border: 1px solid rgba(248,81,73,.3); }
.badge--yellow { background: rgba(227,179,65,.15); color: var(--yellow); border: 1px solid rgba(227,179,65,.3); }
.badge--gray   { background: rgba(139,148,158,.15); color: var(--text-muted); border: 1px solid rgba(139,148,158,.3); }

/* ── Buttons ─────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 0.5rem 1rem;
  border-radius: var(--radius);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid transparent;
  text-decoration: none;
  transition: all .15s;
  white-space: nowrap;
  line-height: 1.4;
}

.btn--primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn--primary:hover { background: var(--primary-h); border-color: var(--primary-h); text-decoration: none; color: #fff; }

.btn--ghost { background: transparent; color: var(--text); border-color: var(--border); }
.btn--ghost:hover { background: var(--card-hover); color: var(--text-head); text-decoration: none; }

.btn--danger { background: rgba(218,54,51,.15); color: var(--red); border-color: rgba(218,54,51,.3); }
.btn--danger:hover { background: var(--danger); color: #fff; text-decoration: none; }

.btn--sm   { padding: 0.35rem 0.75rem; font-size: 0.8rem; }
.btn--xs   { padding: 0.2rem 0.5rem; font-size: 0.75rem; }
.btn--full { width: 100%; justify-content: center; }

/* ── Forms ───────────────────────────────────────────────── */
.form { display: flex; flex-direction: column; gap: 1.25rem; padding: 1.5rem; }
.form-group { display: flex; flex-direction: column; gap: 0.4rem; }
.form-group--sm { min-width: 140px; }
.form-label { font-size: 0.82rem; font-weight: 600; color: var(--text); }
.form-hint  { font-size: 0.75rem; color: var(--text-muted); }

.form-input, .form-select {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  padding: 0.5rem 0.75rem;
  font-size: 0.875rem;
  width: 100%;
  transition: border-color .15s;
  outline: none;
}

.form-input:focus, .form-select:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(56,139,253,.15); }
.form-input::placeholder { color: var(--text-muted); }
.form-input--code { text-align: center; font-size: 1.5rem; letter-spacing: .5rem; font-family: monospace; }

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
@media (max-width: 500px) { .form-row { grid-template-columns: 1fr; } }

.form-actions { display: flex; gap: 0.75rem; flex-wrap: wrap; }

.input-prefix-wrap { position: relative; }
.input-prefix { position: absolute; left: 0.75rem; top: 50%; transform: translateY(-50%); color: var(--text-muted); font-size: 0.85rem; pointer-events: none; }
.input-prefix-wrap .form-input { padding-left: 2.5rem; }

.checkbox-label { display: flex; align-items: center; gap: 8px; cursor: pointer; font-size: 0.875rem; }
.checkbox-label input[type=checkbox] { width: 16px; height: 16px; accent-color: var(--primary); }

/* ── Filters ─────────────────────────────────────────────── */
.filter-form { display: flex; gap: 0.75rem; flex-wrap: wrap; align-items: flex-end; }
.filter-row { display: flex; gap: 0.75rem; flex-wrap: wrap; align-items: flex-end; width: 100%; }
.filter-actions { display: flex; gap: 0.5rem; align-items: center; margin-top: auto; }

/* ── Settlement Cards ────────────────────────────────────── */
.settlement-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.settlement-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.settlement-card__header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: 1.25rem;
  border-bottom: 1px solid var(--border);
}

.settlement-card__amounts {
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.amount-row { display: flex; justify-content: space-between; align-items: center; }
.amount-label { color: var(--text-muted); font-size: 0.82rem; }
.amount-value { font-weight: 600; font-size: 0.9rem; }
.amount-big { font-size: 1.6rem; font-weight: 700; color: var(--blue); }

.amount-row--total {
  padding-top: 0.75rem;
  margin-top: 0.25rem;
  border-top: 1px solid var(--border);
}
.amount-row--total .amount-label { color: var(--text); font-weight: 600; text-transform: uppercase; font-size: 0.75rem; letter-spacing: .5px; }

.settlement-card .btn--full { border-radius: 0; }

/* ── Alerts / Flash ──────────────────────────────────────── */
.alert {
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  font-size: 0.875rem;
  margin-bottom: 1rem;
  border: 1px solid transparent;
}

.alert--error   { background: rgba(218,54,51,.12); color: var(--red);    border-color: rgba(218,54,51,.3); }
.alert--success { background: rgba(63,185,80,.12);  color: var(--green);  border-color: rgba(63,185,80,.3); }
.alert--info    { background: rgba(88,166,255,.12); color: var(--blue);   border-color: rgba(88,166,255,.3); }
.alert--warning { background: rgba(227,179,65,.12); color: var(--yellow); border-color: rgba(227,179,65,.3); }

.flash {
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  margin-bottom: 1.5rem;
  font-size: 0.875rem;
  border: 1px solid transparent;
}
.flash--success { background: rgba(63,185,80,.12);  color: var(--green);  border-color: rgba(63,185,80,.3); }
.flash--error   { background: rgba(218,54,51,.12);  color: var(--red);    border-color: rgba(218,54,51,.3); }
.flash--info    { background: rgba(88,166,255,.12); color: var(--blue);   border-color: rgba(88,166,255,.3); }
.flash--warning { background: rgba(227,179,65,.12); color: var(--yellow); border-color: rgba(227,179,65,.3); }

/* ── Pagination ──────────────────────────────────────────── */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  padding: 1rem;
  border-top: 1px solid var(--border);
}
.pagination-info { color: var(--text-muted); font-size: 0.85rem; }

/* ── Empty State ─────────────────────────────────────────── */
.empty-state {
  text-align: center;
  padding: 3rem 2rem;
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* ── Actions ─────────────────────────────────────────────── */
.action-group { display: flex; gap: 0.4rem; align-items: center; flex-wrap: wrap; }

/* ── 2FA ─────────────────────────────────────────────────── */
.twofa-intro { padding: 0 1.5rem; margin-bottom: 1.5rem; font-size: 0.875rem; color: var(--text-muted); }
.twofa-qr { text-align: center; padding: 1.5rem; background: #fff; margin: 0 1.5rem; border-radius: var(--radius); }
.qr-image { width: 200px; height: 200px; }
.twofa-secret { padding: 1rem 1.5rem; background: var(--surface); margin: 1rem 1.5rem; border-radius: var(--radius); }
.secret-key { display: block; font-family: monospace; color: var(--green); word-break: break-all; font-size: 0.85rem; margin-top: 0.4rem; }

/* ── Error page ──────────────────────────────────────────── */
.error-card { text-align: center; }
.error-code { font-size: 5rem; font-weight: 700; color: var(--border); line-height: 1; margin-bottom: .5rem; }
.error-title { color: var(--text-head); font-size: 1.4rem; margin-bottom: .75rem; }
.error-message { color: var(--text-muted); margin-bottom: 1.5rem; }
.error-card .btn { display: inline-flex; }

/* ── Utilities ───────────────────────────────────────────── */
.text-green   { color: var(--green) !important; }
.text-blue    { color: var(--blue) !important; }
.text-red     { color: var(--red) !important; }
.text-muted   { color: var(--text-muted); }
.text-sm      { font-size: 0.82rem; }
.text-xs      { font-size: 0.72rem; }
.text-lg      { font-size: 1.1rem; }
.text-mono    { font-family: monospace; }
.text-nowrap  { white-space: nowrap; }
.text-center  { text-align: center; }
.fw-bold      { font-weight: 700; }
.link         { color: var(--accent); }
.link:hover   { color: var(--accent-h); }

.code-small {
  font-size: 0.72rem;
  background: var(--surface);
  padding: 0.5rem;
  border-radius: 4px;
  overflow-x: auto;
  max-width: 300px;
  white-space: pre;
  margin-top: 0.5rem;
}

details summary { cursor: pointer; color: var(--accent); font-size: 0.8rem; }

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 768px) {
  .sidebar { width: 100%; height: auto; position: relative; border-right: none; border-bottom: 1px solid var(--border); }
  .layout { flex-direction: column; }
  .main-content { padding: 1rem; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .settlement-grid { grid-template-columns: 1fr; }
  .page-header { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 480px) {
  .stats-grid { grid-template-columns: 1fr; }
  .auth-card { padding: 1.5rem; }
}