:root {
  --navy-950: #0b1120;
  --navy-900: #0f172a;
  --navy-800: #141f38;
  --navy-700: #1c2942;
  --accent: #6366f1;
  --accent-dark: #4f46e5;
  --accent-light: #eef2ff;
  --purple: #8b5cf6;
  --bg: #f4f6fb;
  --card: #ffffff;
  --text: #1e2433;
  --text-muted: #6b7280;
  --border: #e7eaf1;
  --success: #16a34a;
  --success-bg: #e9f9ef;
  --warning: #d97706;
  --warning-bg: #fef6e6;
  --danger: #dc2626;
  --danger-bg: #fdecec;
  --radius: 14px;
  --shadow-sm: 0 1px 2px rgba(16, 24, 40, .04);
  --shadow: 0 4px 14px rgba(16, 24, 40, .06);
  --shadow-lg: 0 12px 28px rgba(16, 24, 40, .10);
}

* { box-sizing: border-box; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14.5px;
}

a { text-decoration: none; }

/* ---------- App Shell ---------- */
.app-shell { display: flex; min-height: 100vh; }

.sidebar {
  width: 250px;
  flex-shrink: 0;
  background: linear-gradient(180deg, var(--navy-950), var(--navy-900) 60%, var(--navy-800));
  color: #cbd5e1;
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; bottom: 0; left: 0;
  z-index: 1040;
  transition: transform .25s ease;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: .65rem;
  padding: 1.35rem 1.25rem;
  color: #fff;
  font-weight: 700;
  font-size: 1.05rem;
  border-bottom: 1px solid rgba(255,255,255,.06);
}
.sidebar-brand .brand-icon {
  width: 34px; height: 34px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), var(--purple));
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 1rem;
  flex-shrink: 0;
}

.sidebar-nav { flex: 1; overflow-y: auto; padding: .85rem .75rem; }
.sidebar-section-label {
  font-size: .68rem; text-transform: uppercase; letter-spacing: .08em;
  color: #64748b; padding: .9rem .75rem .35rem;
}
.sidebar-nav .nav-link {
  display: flex; align-items: center; gap: .7rem;
  color: #a9b4c9; padding: .62rem .85rem;
  border-radius: 10px; font-size: .89rem; font-weight: 500;
  margin-bottom: 2px;
  transition: background .15s ease, color .15s ease;
}
.sidebar-nav .nav-link i { width: 18px; text-align: center; font-size: .95rem; opacity: .85; }
.sidebar-nav .nav-link:hover { background: rgba(255,255,255,.06); color: #fff; }
.sidebar-nav .nav-link.active {
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: #fff;
  box-shadow: 0 4px 12px rgba(99,102,241,.35);
}
.sidebar-footer { padding: .85rem .75rem 1.1rem; border-top: 1px solid rgba(255,255,255,.06); }

.main {
  margin-left: 250px;
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.topbar {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  padding: .85rem 1.75rem;
  display: flex; align-items: center; justify-content: space-between;
  position: sticky; top: 0; z-index: 1020;
}
.topbar-title { font-size: 1.15rem; font-weight: 700; color: var(--text); }
.topbar-actions { display: flex; align-items: center; gap: 1rem; }
.topbar-icon-btn {
  width: 38px; height: 38px; border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  background: var(--bg); color: var(--text-muted); border: 1px solid var(--border);
  position: relative;
}
.topbar-icon-btn .dot {
  position: absolute; top: 7px; right: 8px;
  width: 7px; height: 7px; border-radius: 50%; background: var(--danger);
}
.user-chip { display: flex; align-items: center; gap: .6rem; cursor: pointer; }
.user-avatar {
  width: 36px; height: 36px; border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--purple));
  color: #fff; display: flex; align-items: center; justify-content: center;
  font-weight: 600; font-size: .85rem;
}
.sidebar-toggle-btn {
  display: none;
  width: 38px; height: 38px; border-radius: 10px;
  align-items: center; justify-content: center;
  background: var(--bg); border: 1px solid var(--border); color: var(--text);
}

.content { padding: 1.75rem; flex: 1; }

/* ---------- Cards ---------- */
.card-surface {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}
.card-surface.elevated { box-shadow: var(--shadow); }
.card-pad { padding: 1.4rem; }

.stat-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.4rem;
  box-shadow: var(--shadow-sm);
}
.stat-card .stat-label { font-size: .8rem; color: var(--text-muted); font-weight: 500; }
.stat-card .stat-value { font-size: 1.65rem; font-weight: 700; margin: .25rem 0 .35rem; color: var(--text); }
.stat-card .stat-delta { font-size: .78rem; font-weight: 600; }
.stat-card .stat-delta.up { color: var(--success); }
.stat-card .stat-delta.down { color: var(--danger); }
.stat-icon {
  width: 42px; height: 42px; border-radius: 11px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.05rem;
}

.section-title { font-weight: 700; font-size: 1rem; color: var(--text); }
.section-sub { font-size: .8rem; color: var(--text-muted); }
.breadcrumb-mini { font-size: .78rem; color: var(--text-muted); margin-bottom: .3rem; }
.breadcrumb-mini a { color: var(--text-muted); }
.breadcrumb-mini a:hover { color: var(--accent); }

/* ---------- Buttons ---------- */
.btn { border-radius: 10px; font-weight: 600; font-size: .86rem; padding: .55rem 1.05rem; }
.btn-sm { padding: .4rem .75rem; font-size: .8rem; border-radius: 8px; }
.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  border: none;
  box-shadow: 0 4px 10px rgba(99,102,241,.28);
}
.btn-primary:hover { background: linear-gradient(135deg, var(--accent-dark), var(--accent-dark)); }
.btn-outline-secondary { border-color: var(--border); color: var(--text); }
.btn-light-soft { background: var(--accent-light); color: var(--accent-dark); border: none; }
.btn-icon { width: 34px; height: 34px; padding: 0; display: inline-flex; align-items: center; justify-content: center; border-radius: 9px; }

/* ---------- Forms ---------- */
.form-label { font-weight: 600; font-size: .84rem; color: var(--text); margin-bottom: .35rem; }
.form-label .required { color: var(--danger); }
.form-hint { font-size: .76rem; color: var(--text-muted); margin-top: .25rem; }
.form-control, .form-select {
  border-radius: 10px; border: 1px solid var(--border); font-size: .87rem;
  padding: .55rem .8rem;
}
.form-control:focus, .form-select:focus {
  border-color: var(--accent); box-shadow: 0 0 0 3px rgba(99,102,241,.14);
}

/* ---------- Tables ---------- */
.table-modern { width: 100%; border-collapse: separate; border-spacing: 0; font-size: .86rem; }
.table-modern thead th {
  text-transform: uppercase; font-size: .7rem; letter-spacing: .04em;
  color: var(--text-muted); font-weight: 700; padding: .8rem 1rem;
  border-bottom: 1px solid var(--border); white-space: nowrap;
}
.table-modern tbody td { padding: .85rem 1rem; border-bottom: 1px solid var(--border); vertical-align: middle; }
.table-modern tbody tr:last-child td { border-bottom: none; }
.table-modern tbody tr:hover { background: #fafbfe; }
.table-responsive-wrap { overflow-x: auto; }

.company-cell { display: flex; align-items: center; gap: .65rem; }
.company-avatar {
  width: 34px; height: 34px; border-radius: 9px; flex-shrink: 0;
  background: var(--accent-light); color: var(--accent-dark);
  display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: .78rem;
}

/* ---------- Badges ---------- */
.badge { font-weight: 600; font-size: .72rem; padding: .35rem .6rem; border-radius: 999px; }
.badge-success { background: var(--success-bg); color: var(--success); }
.badge-warning { background: var(--warning-bg); color: var(--warning); }
.badge-danger { background: var(--danger-bg); color: var(--danger); }
.badge-secondary { background: #eef1f6; color: #64748b; }

/* ---------- Auth ---------- */
.auth-shell {
  min-height: 100vh; display: flex; align-items: stretch;
  background: var(--bg);
}
.auth-visual {
  flex: 1.1;
  background: linear-gradient(160deg, var(--accent-light), #eef0fb);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  padding: 3rem; text-align: center;
}
.auth-visual .brand-icon-lg {
  width: 76px; height: 76px; border-radius: 20px;
  background: linear-gradient(135deg, var(--accent), var(--purple));
  color: #fff; display: flex; align-items: center; justify-content: center;
  font-size: 1.9rem; margin-bottom: 1.25rem; box-shadow: var(--shadow-lg);
}
.auth-form-side {
  flex: 1; display: flex; align-items: center; justify-content: center; padding: 2rem;
  background: var(--card);
}
.auth-form-inner { width: 100%; max-width: 380px; }

/* ---------- Misc ---------- */
.empty-state { text-align: center; padding: 3rem 1.5rem; color: var(--text-muted); }
.empty-state i { font-size: 2.4rem; color: #c9cfdb; margin-bottom: .75rem; }
.chip {
  display: inline-flex; align-items: center; gap: .4rem;
  background: var(--accent-light); color: var(--accent-dark);
  padding: .35rem .55rem .35rem .75rem; border-radius: 999px; font-size: .8rem; font-weight: 600;
}
.chip .chip-remove { cursor: pointer; opacity: .65; }
.chip .chip-remove:hover { opacity: 1; }

.recipient-row { display: flex; align-items: center; justify-content: space-between; padding: .55rem .25rem; border-bottom: 1px solid var(--border); font-size: .84rem; }
.recipient-row:last-child { border-bottom: none; }

.ql-toolbar.ql-snow { border-radius: 10px 10px 0 0; border-color: var(--border); }
.ql-container.ql-snow { border-radius: 0 0 10px 10px; border-color: var(--border); font-size: .87rem; min-height: 220px; }

.toast-stack { position: fixed; top: 1.25rem; right: 1.25rem; z-index: 2000; display: flex; flex-direction: column; gap: .6rem; }
.app-toast {
  min-width: 280px; max-width: 360px;
  background: var(--card); border-radius: 12px; box-shadow: var(--shadow-lg);
  padding: .85rem 1rem; display: flex; align-items: flex-start; gap: .65rem;
  border-left: 4px solid var(--accent);
  animation: slideIn .2s ease;
}
.app-toast.success { border-color: var(--success); }
.app-toast.error { border-color: var(--danger); }
.app-toast .toast-icon { font-size: 1.05rem; margin-top: 1px; }
.app-toast.success .toast-icon { color: var(--success); }
.app-toast.error .toast-icon { color: var(--danger); }
.app-toast.info .toast-icon { color: var(--accent); }
@keyframes slideIn { from { transform: translateX(20px); opacity: 0; } to { transform: translateX(0); opacity: 1; } }

.modal-content { border-radius: var(--radius); border: none; box-shadow: var(--shadow-lg); }
.nav-tabs-modern .nav-link { border: none; color: var(--text-muted); font-weight: 600; font-size: .85rem; padding: .6rem 1rem; border-radius: 10px 10px 0 0; }
.nav-tabs-modern .nav-link.active { color: var(--accent-dark); background: var(--accent-light); }

.progress-modern { height: 8px; border-radius: 999px; background: var(--bg); overflow: hidden; }
.progress-modern .bar { height: 100%; background: linear-gradient(90deg, var(--accent), var(--purple)); transition: width .25s ease; }

@media (max-width: 991px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); box-shadow: var(--shadow-lg); }
  .main { margin-left: 0; }
  .sidebar-toggle-btn { display: flex; }
  .sidebar-backdrop { display: none; position: fixed; inset: 0; background: rgba(15,23,42,.45); z-index: 1030; }
  .sidebar-backdrop.show { display: block; }
}

@media (max-width: 767px) {
  .content { padding: 1rem; }
  .topbar { padding: .75rem 1rem; }
  .auth-visual { display: none; }
}