:root {
  --primary: #3b82f6;
  --primary-dark: #1e40af;
  --primary-light: #60a5fa;
  --accent: #f97316;
  --accent-dark: #ea580c;
  --accent-light: #fb923c;
  --bg: #0b1120;
  --surface: #151e32;
  --surface-2: #1b2640;
  --bg-landing: #141414;
  --border: #263451;
  --text: #e5e7eb;
  --muted: #94a3b8;
  --sidebar-width: 240px;
  color-scheme: dark;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
}

a { color: var(--primary-light); text-decoration: none; }
a:hover { color: #93c5fd; }
.link-accent { color: var(--accent-light); font-weight: 600; }
.link-accent:hover { color: var(--accent); }
.link-primary { color: var(--primary-light) !important; }
.text-accent { color: var(--accent-light) !important; }
.text-muted { color: var(--muted) !important; }

/* App shell */
.app-shell { display: flex; min-height: 100vh; }
.app-content { flex: 1; margin-left: var(--sidebar-width); display: flex; flex-direction: column; min-width: 0; }

/* Sidebar */
.sidebar {
  position: fixed;
  top: 0; left: 0; bottom: 0;
  width: var(--sidebar-width);
  background: linear-gradient(180deg, #0a1022 0%, #12255e 100%);
  color: #fff;
  padding: 1.25rem 0;
  overflow-y: auto;
  z-index: 1030;
  border-right: 1px solid var(--border);
  transition: transform .3s ease;
}
.sidebar-brand {
  display: flex; align-items: center; gap: .6rem;
  padding: 0 1.25rem 1rem 1.25rem;
  font-size: 1.1rem; font-weight: 700;
  border-bottom: 1px solid rgba(255,255,255,.1);
  margin-bottom: .75rem;
}
.sidebar-brand i { color: var(--accent); font-size: 1.4rem; }
.sidebar-section-title {
  padding: .75rem 1.25rem .25rem;
  font-size: .7rem;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: rgba(255,255,255,.5);
}
.sidebar-nav { display: flex; flex-direction: column; }
.sidebar-nav .nav-item {
  display: flex; align-items: center; gap: .75rem;
  padding: .65rem 1.25rem;
  color: rgba(255,255,255,.8);
  border-left: 3px solid transparent;
  transition: all .2s ease;
}
.sidebar-nav .nav-item i { width: 18px; text-align: center; }
.sidebar-nav .nav-item:hover {
  background: #4db3f771;
  color: #fff;
  border-left-color: var(--primary);
}
.sidebar-nav .nav-item.active {
  background: #3b83f671;
  color: #fff;
  border-left-color: var(--primary);
  font-weight: 600;
}

/* Topbar */
.topbar {
  height: 60px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; gap: 1rem;
  padding: 0 1.5rem;
  position: sticky; top: 0;
  z-index: 100;
}
.topbar-title { font-weight: 600; flex: 1; color: var(--text); }
.topbar-right { display: flex; align-items: center; }
.sidebar-toggle { display: none; color: var(--text); }
.user-menu { background: transparent; border: none; display: flex; align-items: center; gap: .5rem; color: var(--text); }
.user-name { font-size: .9rem; color: var(--text); }
.user-avatar {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  color: #fff;
  display: inline-flex; align-items: center; justify-content: center;
  font-weight: 600;
}
.badge-accent { background: var(--accent); color: #fff; }

/* Main content */
.main-content { padding: 1.5rem; flex: 1; }
.page-header { margin-bottom: 1.25rem; }
.page-title { font-size: 1.5rem; font-weight: 700; margin: 0; color: var(--text); }
.page-subtitle { color: var(--muted); margin: .25rem 0 0; font-size: .9rem; }

/* Cards */
.card {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: 0 1px 2px rgba(0,0,0,.35);
}
.card-header {
  background: var(--surface) !important;
  color: var(--text);
  border-bottom: 1px solid var(--border);
  border-radius: 12px 12px 0 0 !important;
}
.card-footer { background: var(--surface); border-top: 1px solid var(--border); }

/* Stat cards */
.stat-card {
  display: flex; align-items: center; gap: 1rem;
  flex-direction: column;
  justify-content: center;
  text-align: center;
  padding: 1.25rem;
  border: none;
  color: #fff;
  border-radius: 12px;
  min-height: 110px;
}
.stat-card .stat-icon {
  width: 56px; height: 56px;
  border-radius: 12px;
  background: rgba(255,255,255,.18);
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 1.5rem;
}
.stat-card .stat-label { font-size: .8rem; text-transform: uppercase; letter-spacing: .05em; opacity: .9; }
.stat-card .stat-value { font-size: 1.6rem; font-weight: 700; line-height: 1.1; }
.stat-blue { background: linear-gradient(135deg, #1e40af 0%, #3b5fdb 100%); }
.stat-orange { background: linear-gradient(135deg, #ea580c 0%, #fb923c 100%); }
.stat-gray { background: linear-gradient(135deg, #252526 0%, #333333 100%); }
.stat-green { background: linear-gradient(135deg, #28a745 0%, #28a745 100%); }

/* Buttons */
.btn-primary { background-color: var(--primary); border-color: var(--primary); color: #fff; }
.btn-primary:hover, .btn-primary:focus { background-color: #2563eb; border-color: #2563eb; }
.btn-outline-primary { color: var(--primary-light); border-color: var(--primary); }
.btn-outline-primary:hover { background-color: var(--primary); border-color: var(--primary); color: #fff; }
.btn-accent { background-color: var(--accent); border-color: var(--accent); color: #fff; }
.btn-accent:hover, .btn-accent:focus { background-color: var(--accent-dark); border-color: var(--accent-dark); color: #fff; }
.btn-outline-accent { color: var(--accent-light); border-color: var(--accent); background: transparent; }
.btn-outline-accent:hover { background-color: var(--accent); border-color: var(--accent); color: #fff; }
.btn-light, .btn-outline-secondary { color: var(--text); border-color: var(--border); background: transparent; }
.btn-light:hover, .btn-outline-secondary:hover { background: var(--surface-2); color: #fff; border-color: var(--border); }

/* Forms */
.form-label { color: var(--text); }
.form-control, .form-select, .input-group-text {
  background-color: var(--surface-2);
  color: var(--text);
  border-color: var(--border);
}
.form-control::placeholder { color: #64748b; }
.form-control:disabled, .form-select:disabled, .form-control[readonly] {
  background-color: #111a2e;
  color: var(--muted);
}
.form-control:focus, .form-select:focus {
  background-color: var(--surface-2);
  color: var(--text);
  border-color: var(--primary);
  box-shadow: 0 0 0 .2rem rgba(59, 130, 246, 0.25);
}
.form-check-input { background-color: var(--surface-2); border-color: var(--border); }
.form-check-input:checked { background-color: var(--primary); border-color: var(--primary); }

/* Tables */
.table {
  --bs-table-bg: transparent;
  --bs-table-color: var(--text);
  --bs-table-border-color: var(--border);
  --bs-table-hover-bg: rgba(59,130,246,.08);
  --bs-table-hover-color: var(--text);
  --bs-table-striped-bg: rgba(255,255,255,.02);
  --bs-table-striped-color: var(--text);
  color: var(--text);
  border-color: var(--border);
}
.table > :not(caption) > * > * { background-color: transparent; border-bottom-color: var(--border); }
.table thead th {
  background: var(--surface-2);
  color: var(--muted);
  text-transform: uppercase;
  font-size: .75rem;
  letter-spacing: .04em;
  border-bottom: 1px solid var(--border);
}

/* Pagination */
.page-item.active .page-link { background-color: var(--primary); border-color: var(--primary); color: #fff; }
.page-link { color: var(--primary-light); background: var(--surface); border-color: var(--border); }
.page-link:hover { color: #93c5fd; background: var(--surface-2); border-color: var(--border); }
.page-item.disabled .page-link { background: var(--surface); color: #64748b; border-color: var(--border); }

/* Dropdown, modal, alerts, list-group */
.dropdown-menu { background: var(--surface); border: 1px solid var(--border); }
.dropdown-item { color: var(--text); }
.dropdown-item:hover, .dropdown-item:focus { background: var(--surface-2); color: #fff; }
.dropdown-divider { border-top-color: var(--border); }
.modal-content { background: var(--surface); color: var(--text); border: 1px solid var(--border); }
.modal-header, .modal-footer { border-color: var(--border); }
.btn-close { filter: invert(1) grayscale(100%) brightness(200%); }
.list-group-item { background: var(--surface); color: var(--text); border-color: var(--border); }
.alert { border-color: var(--border); }
hr { border-color: var(--border); opacity: 1; }

/* Auth pages */
.auth-body {
  background: linear-gradient(135deg, #141414 0%, #12255e 50%, #9a3412 150%);
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  padding: 1.5rem;
}
.auth-shell { width: 100%; max-width: 460px; }
.auth-card { padding: 2rem; border-radius: 16px; }
.auth-brand { text-align: center; margin-bottom: 1.5rem; }
.auth-brand i { color: var(--accent); font-size: 2.5rem; }
.auth-brand h2 { margin: .5rem 0 .25rem; font-weight: 700; }
.auth-brand p { color: var(--muted); margin: 0; }
.auth-footer { text-align: center; margin-top: 1.25rem; color: var(--muted); }

/* Modal */
.app-dialog {
    position: fixed; inset: 0;
    width: 100vw; height: 100dvh; max-width: 100%; max-height: 100%;
    margin: 0; padding: 16px; border: none;
    border-bottom: 1px solid var(--border);
    background: transparent;
    align-items: center; justify-content: center;
    overflow: hidden;
  }
  .app-dialog[open] { display: flex; }
  .app-dialog::backdrop { background: transparent; }

  .app-dialog .dialog-box {
    position: relative;
    width: 100%; max-width: 520px;
    overflow: hidden;
    border-radius: 1rem;
    border: 1px solid var(--surface-2);
    background: var(--surface);
  }
  .chart-wrap { position: relative; height: 280px; }

/* Error page */
.error-page .display-1 { font-size: 6rem; }

/* Order item rows in form */
.order-item-row { background: var(--surface-2); padding: .5rem; border-radius: 8px; }

/* Scrollbar */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 8px; }
::-webkit-scrollbar-thumb:hover { background: #34456a; }

/* Responsive */
@media (max-width: 992px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .app-content { margin-left: 0; }
  .sidebar-toggle { display: inline-flex; }
}