/* ==================== RESET & BASE ==================== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --bg: #0a0b10;
  --bg-soft: #0f1119;
  --surface: #13151f;
  --surface-hover: #1a1d2b;
  --border: #1e2033;
  --border-light: #272a3d;
  --text: #e4e6f0;
  --text-secondary: #8f9bb3;
  --text-muted: #5a6480;
  --primary: #6366f1;
  --primary-light: #818cf8;
  --primary-dark: #4f46e5;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --info: #06b6d4;
  --sidebar-w: 250px;
  --sidebar-collapsed-w: 64px;
  --header-h: 60px;
  --radius: 8px;
  --radius-lg: 12px;
  --shadow: 0 4px 24px rgba(0,0,0,.3);
  --transition: 0.2s ease;
}
html, body { height: 100%; font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif; background: var(--bg); color: var(--text); font-size: 14px; line-height: 1.6; }
a { color: var(--primary-light); text-decoration: none; }
input, select, textarea, button { font-family: inherit; font-size: inherit; }
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--border-light); }

/* ==================== LOGIN OVERLAY ==================== */
.login-overlay {
  position: fixed; inset: 0; z-index: 9999;
  background: var(--bg);
  display: flex; align-items: center; justify-content: center;
}
.login-overlay.hidden { display: none; }
.login-card {
  width: 400px; max-width: 90vw;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow);
}
.login-logo { text-align: center; margin-bottom: 32px; }
.login-logo .icon { font-size: 48px; display: block; margin-bottom: 8px; }
.login-logo h1 { font-size: 24px; font-weight: 700; background: linear-gradient(135deg, var(--primary-light), var(--info)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.login-logo p { color: var(--text-secondary); font-size: 13px; margin-top: 4px; }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-size: 13px; color: var(--text-secondary); margin-bottom: 6px; font-weight: 500; }
.form-group input, .form-group select {
  width: 100%; padding: 10px 14px;
  background: var(--bg); border: 1px solid var(--border);
  border-radius: var(--radius); color: var(--text);
  outline: none; transition: var(--transition);
}
.form-group input:focus, .form-group select:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(99,102,241,.15); }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 10px 20px; border-radius: var(--radius); border: none;
  font-weight: 600; cursor: pointer; transition: var(--transition);
  font-size: 14px;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-primary:disabled { background: var(--gray); cursor: not-allowed; opacity: 0.7; }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: #059669; }
.btn-warning { background: var(--warning); color: #000; }
.btn-warning:hover { background: #d97706; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #dc2626; }
.btn-outline { background: transparent; border: 1px solid var(--border); color: var(--text); }
.btn-outline:hover { background: var(--surface-hover); border-color: var(--border-light); }
.btn-sm { padding: 6px 12px; font-size: 12px; }
.btn-lg { padding: 12px 28px; font-size: 16px; }
.btn-block { width: 100%; }
.login-error { color: var(--danger); font-size: 13px; text-align: center; margin-top: 12px; display: none; }
.login-error.show { display: block; }

/* ==================== APP LAYOUT ==================== */
.app-container { display: flex; height: 100vh; }
.app-container.loading .page-content { opacity: 0; }
.sidebar {
  width: var(--sidebar-w); min-width: var(--sidebar-w);
  background: var(--bg-soft); border-right: 1px solid var(--border);
  display: flex; flex-direction: column;
  transition: var(--transition); overflow: hidden;
}
.sidebar.collapsed { width: var(--sidebar-collapsed-w); min-width: var(--sidebar-collapsed-w); }
.sidebar-brand {
  height: var(--header-h); display: flex; align-items: center; gap: 12px;
  padding: 0 20px; border-bottom: 1px solid var(--border);
  font-weight: 700; font-size: 16px; white-space: nowrap;
  background: linear-gradient(135deg, var(--primary-light), var(--info));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.sidebar.collapsed .sidebar-brand span { display: none; }
.sidebar-nav { flex: 1; padding: 12px 0; overflow-y: auto; }
.sidebar-nav .nav-item {
  display: flex; align-items: center; gap: 12px;
  padding: 10px 20px; cursor: pointer;
  color: var(--text-secondary); font-size: 14px;
  transition: var(--transition); white-space: nowrap;
  border-left: 3px solid transparent;
}
.sidebar-nav .nav-item:hover { background: var(--surface-hover); color: var(--text); }
.sidebar-nav .nav-item.active { color: var(--primary-light); background: rgba(99,102,241,.1); border-left-color: var(--primary-light); }
.sidebar-nav .nav-item svg { width: 20px; height: 20px; flex-shrink: 0; }
.sidebar.collapsed .sidebar-nav .nav-item { justify-content: center; padding: 10px 0; }
.sidebar.collapsed .sidebar-nav .nav-item span { display: none; }
.sidebar-footer { padding: 12px 16px; border-top: 1px solid var(--border); font-size: 12px; color: var(--text-muted); }
.sidebar-footer .user-info { display: flex; align-items: center; gap: 10px; }
.sidebar-footer .user-avatar {
  width: 36px; height: 36px; border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--info));
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; color: #fff; font-size: 14px;
}
.sidebar.collapsed .sidebar-footer .user-info > span { display: none; }
.main-area { flex: 1; display: flex; flex-direction: column; overflow: hidden; }
.topbar {
  height: var(--header-h); min-height: var(--header-h);
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 24px; background: var(--bg-soft);
}
.topbar-left { display: flex; align-items: center; gap: 16px; }
.topbar-right { display: flex; align-items: center; gap: 12px; }
.toggle-sidebar { cursor: pointer; color: var(--text-secondary); padding: 4px; border-radius: 4px; }
.toggle-sidebar:hover { color: var(--text); background: var(--surface-hover); }
.page-title { font-size: 18px; font-weight: 600; }
.page-content { flex: 1; overflow-y: auto; padding: 24px; }

/* ==================== CARDS & WIDGETS ==================== */
.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 20px;
  margin-bottom: 20px;
}
.card-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 16px; padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}
.card-title { font-size: 16px; font-weight: 600; }
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
}
.stat-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 20px;
  display: flex; align-items: center; gap: 16px;
  transition: var(--transition); cursor: default;
}
.stat-card:hover { border-color: var(--border-light); transform: translateY(-1px); }
.stat-icon {
  width: 48px; height: 48px; border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; flex-shrink: 0;
}
.stat-info { flex: 1; }
.stat-value { font-size: 28px; font-weight: 700; line-height: 1; }
.stat-label { font-size: 13px; color: var(--text-secondary); margin-top: 4px; }

/* ==================== TABLE ==================== */
.table-container { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
table th, table td { padding: 10px 14px; text-align: left; border-bottom: 1px solid var(--border); }
table th { color: var(--text-secondary); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: 0.5px; }
table tbody tr { transition: var(--transition); }
table tbody tr:hover { background: var(--surface-hover); }
table tbody tr.clickable { cursor: pointer; }

/* ==================== STATUS BADGES ==================== */
.badge {
  display: inline-flex; align-items: center; padding: 2px 10px;
  border-radius: 20px; font-size: 12px; font-weight: 500;
}
.badge-pending { background: rgba(245,158,11,.15); color: var(--warning); }
.badge-processing { background: rgba(6,182,212,.15); color: var(--info); }
.badge-completed { background: rgba(16,185,129,.15); color: var(--success); }
.badge-canceled { background: rgba(239,68,68,.15); color: var(--danger); }

/* ==================== MODAL ==================== */
.modal-overlay {
  position: fixed; inset: 0; z-index: 1000;
  background: rgba(0,0,0,.6); backdrop-filter: blur(4px);
  display: flex; align-items: center; justify-content: center;
}
.modal-overlay.hidden { display: none; }
.modal {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); width: 90vw; max-width: 800px;
  max-height: 85vh; display: flex; flex-direction: column;
  box-shadow: 0 20px 60px rgba(0,0,0,.5);
}
.modal-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 24px; border-bottom: 1px solid var(--border);
}
.modal-header h3 { font-size: 18px; font-weight: 600; }
.modal-close { cursor: pointer; color: var(--text-secondary); font-size: 20px; }
.modal-close:hover { color: var(--text); }
.modal-body { flex: 1; overflow-y: auto; padding: 24px; }
.modal-footer { padding: 16px 24px; border-top: 1px solid var(--border); display: flex; justify-content: flex-end; gap: 8px; }
.modal-lg { max-width: 1000px; }

/* ==================== FORMS ==================== */
.form-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; }
.form-input, .form-select, .form-textarea {
  width: 100%; padding: 10px 14px;
  background: var(--bg); border: 1px solid var(--border);
  border-radius: var(--radius); color: var(--text);
  outline: none; transition: var(--transition);
}
.form-input:focus, .form-select:focus, .form-textarea:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(99,102,241,.15); }
.form-textarea { resize: vertical; min-height: 80px; }
.form-select option { background: var(--surface); color: var(--text); }

/* Date input styling for dark mode */
input[type="date"] {
  position: relative;
}
input[type="date"]::-webkit-datetime-edit,
input[type="date"]::-webkit-datetime-edit-year-field,
input[type="date"]::-webkit-datetime-edit-month-field,
input[type="date"]::-webkit-datetime-edit-day-field,
input[type="date"]::-webkit-datetime-edit-text {
  color: var(--text);
}
input[type="date"]::-webkit-calendar-picker-indicator {
  filter: invert(1);
  cursor: pointer;
}
input[type="date"].form-input:invalid::-webkit-datetime-edit {
  color: var(--text-muted);
}
input[type="range"] {
  -webkit-appearance: none; appearance: none;
  height: 6px; background: #e2e8f0; border-radius: 3px; outline: none; cursor: pointer;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none;
  width: 20px; height: 20px; border-radius: 50%; background: var(--primary);
  box-shadow: 0 1px 4px rgba(0,0,0,.2); cursor: pointer; transition: transform .15s;
}
input[type="range"]::-webkit-slider-thumb:hover { transform: scale(1.15); }
input[type="range"]::-moz-range-thumb {
  width: 20px; height: 20px; border-radius: 50%; background: var(--primary); border: none;
  box-shadow: 0 1px 4px rgba(0,0,0,.2); cursor: pointer;
}

/* ==================== FINANCE SPREADSHEET ==================== */
.spreadsheet { overflow-x: auto; }
.spreadsheet table { min-width: 900px; }
.spreadsheet th { background: var(--bg-soft); position: sticky; top: 0; z-index: 1; }
.spreadsheet td input, .spreadsheet td select {
  width: 100%; background: transparent; border: 1px solid transparent;
  color: var(--text); padding: 4px 8px; border-radius: 4px;
  font-size: 13px;
}
.spreadsheet td input:focus, .spreadsheet td select:focus {
  background: var(--bg); border-color: var(--primary);
  outline: none;
}

/* ==================== FILTER BAR ==================== */
.filter-bar {
  display: flex; flex-wrap: wrap; gap: 12px; align-items: center;
  margin-bottom: 20px; padding: 16px;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}
.filter-bar input, .filter-bar select { min-width: 150px; }

/* ==================== TABS ==================== */
.tabs { display: flex; gap: 0; border-bottom: 2px solid var(--border); margin-bottom: 20px; }
.tab {
  padding: 10px 20px; cursor: pointer; color: var(--text-secondary);
  border-bottom: 2px solid transparent; margin-bottom: -2px;
  transition: var(--transition); font-weight: 500;
}
.tab:hover { color: var(--text); }
.tab.active { color: var(--primary-light); border-bottom-color: var(--primary-light); }

/* ==================== IMAGE GRID ==================== */
.image-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); gap: 12px; }
.image-grid img {
  width: 100%; aspect-ratio: 1; object-fit: cover;
  border-radius: var(--radius); border: 1px solid var(--border);
  cursor: pointer; transition: var(--transition);
}
.image-grid img:hover { transform: scale(1.05); }

/* ==================== TOOLBAR ==================== */
.toolbar { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-bottom: 16px; }

/* ==================== PAGINATION ==================== */
.pagination { display: flex; justify-content: center; gap: 4px; margin-top: 20px; }
.pagination button {
  padding: 6px 12px; border: 1px solid var(--border);
  background: var(--surface); color: var(--text);
  border-radius: var(--radius); cursor: pointer;
  transition: var(--transition);
}
.pagination button:hover { background: var(--surface-hover); }
.pagination button.active { background: var(--primary); border-color: var(--primary); color: #fff; }

/* ==================== DASHBOARD CONFIG ==================== */
.config-list { display: flex; flex-direction: column; gap: 8px; }
.config-item {
  display: flex; align-items: center; gap: 12px;
  padding: 10px 14px; background: var(--bg);
  border: 1px solid var(--border); border-radius: var(--radius);
}
.config-item .drag-handle { cursor: grab; color: var(--text-muted); }
.config-item .config-label { flex: 1; }
.config-item .config-color {
  width: 24px; height: 24px; border-radius: 4px;
  border: 1px solid var(--border); cursor: pointer;
}
.config-item input[type="text"] {
  background: transparent; border: 1px solid var(--border);
  padding: 4px 8px; border-radius: 4px; color: var(--text);
}

/* ==================== EMPTY STATE ==================== */
.empty-state {
  text-align: center; padding: 60px 20px; color: var(--text-secondary);
}
.empty-state .empty-icon { font-size: 48px; margin-bottom: 12px; }
.empty-state p { font-size: 14px; }

/* ==================== RESPONSIVE ==================== */
@media (max-width: 768px) {
  .sidebar { position: fixed; left: -100%; z-index: 100; height: 100vh; transition: left .3s; }
  .sidebar.mobile-open { left: 0; }
  .main-area { width: 100%; }
  .topbar { padding: 0 16px; }
  .page-content { padding: 16px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .form-row { grid-template-columns: 1fr; }
  .filter-bar { flex-direction: column; }
  .filter-bar input, .filter-bar select { width: 100%; min-width: auto; }
  .modal { width: 95vw; }
}
@media (max-width: 480px) {
  .stats-grid { grid-template-columns: 1fr; }
  .toolbar { flex-direction: column; }
  .toolbar .btn { width: 100%; justify-content: center; }
}

/* ==================== ORDER DETAIL ==================== */
.detail-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.detail-item { margin-bottom: 12px; }
.detail-item .label { font-size: 12px; color: var(--text-secondary); margin-bottom: 2px; }
.detail-item .value { font-size: 15px; }
.history-timeline { padding-left: 0; list-style: none; }
.history-timeline li {
  position: relative; padding-left: 24px; margin-bottom: 12px;
  border-left: 2px solid var(--border); padding-bottom: 12px;
}
.history-timeline li::before {
  content: ''; position: absolute; left: -5px; top: 4px;
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--primary);
}
.history-timeline li .time { font-size: 12px; color: var(--text-muted); }
.history-timeline li .action { font-size: 13px; color: var(--text); }
.history-timeline li .detail-text { font-size: 12px; color: var(--text-secondary); }

/* ==================== HOTKEYS & ANIMATIONS ==================== */
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }
.fade-in { animation: fadeIn .3s ease; }

/* ==================== CONFIG TABS ==================== */
.config-tabs { display: flex; gap: 4px; flex-wrap: wrap; }
.config-tab {
  padding: 6px 16px; border: 1px solid var(--border); border-radius: 6px;
  background: var(--surface); color: var(--text-secondary); cursor: pointer;
  font-size: 13px; transition: var(--transition);
}
.config-tab:hover { border-color: var(--primary); color: var(--text); }
.config-tab.active { background: var(--primary); color: #fff; border-color: var(--primary); }

/* ==================== CONFIG EDITOR ==================== */
.config-list { display: flex; flex-direction: column; gap: 6px; padding: 8px 0; }
.config-item {
  display: flex; align-items: center; gap: 10px;
  background: var(--bg-soft); border: 1px solid var(--border);
  border-radius: 8px; padding: 10px 14px; transition: var(--transition);
}
.config-item:hover { border-color: var(--border-light); }
.config-item input[type="text"],
.config-item input[type="number"] {
  background: var(--bg); border: 1px solid var(--border); border-radius: 6px;
  padding: 6px 10px; color: var(--text); font-size: 13px;
}
.config-item input[type="text"]:focus,
.config-item input[type="number"]:focus {
  border-color: var(--primary); outline: none;
}
.config-color {
  width: 32px; height: 32px; border: 2px solid var(--border); border-radius: 6px;
  cursor: pointer; padding: 2px; background: transparent;
}
.config-color::-webkit-color-swatch-wrapper { padding: 0; }
.config-color::-webkit-color-swatch { border-radius: 4px; border: none; }
.drag-handle {
  cursor: grab; color: var(--text-muted); font-size: 18px; user-select: none; padding: 0 4px;
}
.drag-handle:active { cursor: grabbing; }

/* ==================== RESPONSIVE ==================== */
@media (max-width: 768px) {
  .config-item { flex-wrap: wrap; }
  .config-tabs { width: 100%; }
  .config-tab { flex: 1; text-align: center; min-width: 80px; }
}