/* =========================================================
   ORBIT 電商後台管理系統 — Demo 樣式
   純 CSS，無框架、無 CDN JS 函式庫
   ========================================================= */

:root {
  --bg: #0d1117;
  --bg-elevated: #11161f;
  --bg-card: #151b26;
  --bg-card-hover: #1a2130;
  --bg-input: #0f141d;
  --border: #232b38;
  --border-soft: #1b212b;

  --text-primary: #e6edf3;
  --text-secondary: #9aa4b2;
  --text-muted: #6b7484;

  --accent: #7b61ff;
  --accent-strong: #9583ff;
  --accent-soft: rgba(123, 97, 255, 0.16);
  --accent-soft-border: rgba(123, 97, 255, 0.35);

  --success: #3fb950;
  --success-soft: rgba(63, 185, 80, 0.14);
  --danger: #f85149;
  --danger-soft: rgba(248, 81, 73, 0.14);
  --warning: #e3b341;
  --warning-soft: rgba(227, 179, 65, 0.16);
  --info: #58a6ff;
  --info-soft: rgba(88, 166, 255, 0.14);
  --neutral: #8b949e;
  --neutral-soft: rgba(139, 148, 158, 0.14);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;

  --sidebar-w: 248px;
  --topbar-h: 64px;

  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --dur: 180ms;

  color-scheme: dark;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text-primary);
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang TC", "Microsoft JhengHei", sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.tabular,
.data-table td.num,
.kpi-value,
.time-cell,
.order-id {
  font-family: "JetBrains Mono", "Inter", monospace;
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
}

button { font-family: inherit; }
input { font-family: inherit; }

::selection {
  background: var(--accent-soft-border);
  color: #fff;
}

/* =========================================================
   佈局
   ========================================================= */

.app-shell {
  min-height: 100vh;
  display: flex;
}

.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--sidebar-w);
  background: var(--bg-elevated);
  border-right: 1px solid var(--border-soft);
  display: flex;
  flex-direction: column;
  z-index: 40;
  transition: transform var(--dur) var(--ease);
}

.sidebar-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 22px 22px 18px;
  color: var(--accent-strong);
}

.logo-mark { display: inline-flex; color: var(--accent); }

.logo-text {
  font-weight: 800;
  font-size: 19px;
  letter-spacing: 0.06em;
  color: var(--text-primary);
}

.nav {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 8px 12px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 10px 12px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  font-size: 14.5px;
  font-weight: 500;
  cursor: pointer;
  text-align: left;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}

.nav-icon { display: inline-flex; flex-shrink: 0; opacity: 0.85; }

.nav-item:hover {
  background: var(--bg-card-hover);
  color: var(--text-primary);
}

.nav-item.is-active {
  background: var(--accent-soft);
  color: #fff;
}
.nav-item.is-active .nav-icon { color: var(--accent-strong); opacity: 1; }

.nav-item--disabled {
  color: var(--text-muted);
  cursor: pointer;
}
.nav-item--disabled:hover { background: var(--bg-card-hover); color: var(--text-secondary); }

.nav-badge {
  margin-left: auto;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.04em;
  padding: 2px 6px;
  border-radius: 999px;
  background: var(--border);
  color: var(--text-muted);
}

.sidebar-footer {
  margin-top: auto;
  padding: 16px 22px 22px;
  border-top: 1px solid var(--border-soft);
}
.sidebar-footer p {
  margin: 0;
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.6;
}
.sidebar-footer-sub { margin-top: 2px !important; font-size: 11px !important; }

.sidebar-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  z-index: 39;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur) var(--ease);
}

.main {
  margin-left: var(--sidebar-w);
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  height: var(--topbar-h);
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 0 28px;
  background: rgba(13, 17, 23, 0.86);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-soft);
}

.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 34px;
  height: 34px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  cursor: pointer;
  flex-shrink: 0;
}
.hamburger span {
  display: block;
  height: 2px;
  width: 16px;
  margin: 0 auto;
  background: var(--text-secondary);
  border-radius: 2px;
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.page-title {
  font-size: 17px;
  font-weight: 700;
  margin: 0;
  white-space: nowrap;
}

.topbar-search {
  flex: 1;
  max-width: 420px;
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 8px 14px;
  color: var(--text-muted);
  margin-left: 12px;
}
.topbar-search input {
  background: none;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-size: 13.5px;
  width: 100%;
}
.topbar-search input::placeholder { color: var(--text-muted); }

.topbar-avatar {
  margin-left: auto;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: linear-gradient(135deg, var(--accent), #4f8cff);
  color: #fff;
  font-weight: 700;
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
}

.content {
  padding: 26px 28px 60px;
  max-width: 1240px;
  width: 100%;
}

.page { display: none; }
.page.is-active { display: block; animation: fadeIn 220ms var(--ease); }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: none; }
}

/* =========================================================
   KPI 卡片
   ========================================================= */

.kpi-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 22px;
}

.kpi-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 18px 20px;
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.kpi-card:hover {
  border-color: var(--accent-soft-border);
  transform: translateY(-2px);
}

.kpi-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.kpi-label { font-size: 13px; color: var(--text-secondary); font-weight: 500; }

.kpi-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: var(--border-soft);
  color: var(--text-secondary);
}
.kpi-icon--accent { background: var(--accent-soft); color: var(--accent-strong); }

.kpi-value {
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 8px;
}

.kpi-delta {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 12.5px;
  font-weight: 600;
}
.kpi-delta--up { color: var(--success); }
.kpi-delta--down { color: var(--danger); }

/* =========================================================
   面板 / 圖表
   ========================================================= */

.panel {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px 22px 8px;
  margin-bottom: 20px;
}
.panel--flush { padding: 0; }
.panel--flush .table-scroll { padding: 0; }

.panel-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}
.panel-header h2 { font-size: 15px; font-weight: 700; margin: 0; }
.panel-sub { font-size: 12px; color: var(--text-muted); }

.chart-panel { padding-bottom: 6px; }

.chart-wrap {
  position: relative;
  width: 100%;
}
.chart-wrap svg {
  width: 100%;
  height: 260px;
  display: block;
  overflow: visible;
}

.chart-grid-line { stroke: var(--border-soft); stroke-width: 1; }
.chart-axis-label {
  fill: var(--text-muted);
  font-size: 11px;
  font-family: "JetBrains Mono", monospace;
}
.chart-line {
  fill: none;
  stroke: var(--accent);
  stroke-width: 2.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.chart-area { fill: url(#chartGradient); opacity: 0.9; }
.chart-dot {
  fill: var(--bg-card);
  stroke: var(--accent-strong);
  stroke-width: 2.5;
  cursor: pointer;
  transition: r var(--dur) var(--ease);
}
.chart-dot:hover, .chart-dot.is-hover { r: 6.5; fill: var(--accent-strong); }
.chart-hit { fill: transparent; cursor: pointer; }

.chart-tooltip {
  position: absolute;
  pointer-events: none;
  background: #1c2433;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 7px 11px;
  font-size: 12px;
  color: var(--text-primary);
  box-shadow: 0 8px 20px rgba(0,0,0,0.45);
  transform: translate(-50%, calc(-100% - 12px));
  opacity: 0;
  transition: opacity 120ms var(--ease);
  white-space: nowrap;
  z-index: 5;
}
.chart-tooltip.is-visible { opacity: 1; }
.chart-tooltip .tt-label { color: var(--text-muted); margin-right: 6px; }
.chart-tooltip .tt-value { font-family: "JetBrains Mono", monospace; font-weight: 600; }

/* =========================================================
   表格
   ========================================================= */

.table-scroll {
  overflow-x: auto;
  padding: 0 0 4px;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 720px;
}

.data-table th {
  text-align: left;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

.data-table td {
  padding: 14px 16px;
  font-size: 13.5px;
  border-bottom: 1px solid var(--border-soft);
  color: var(--text-primary);
  white-space: nowrap;
}

.data-table tbody tr {
  transition: background var(--dur) var(--ease);
}
.data-table tbody tr:hover { background: var(--bg-card-hover); }
.data-table tbody tr:last-child td { border-bottom: none; }

.data-table .cell-summary {
  white-space: normal;
  max-width: 280px;
  color: var(--text-secondary);
}

.order-id { font-weight: 600; color: var(--accent-strong); }
.time-cell { color: var(--text-muted); font-size: 12.5px; }

/* =========================================================
   狀態 Pill
   ========================================================= */

.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 11px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  white-space: nowrap;
}
.pill::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}
.pill--pending { background: var(--warning-soft); color: var(--warning); }
.pill--toship  { background: var(--info-soft); color: var(--info); }
.pill--shipped { background: var(--success-soft); color: var(--success); }
.pill--cancelled { background: var(--neutral-soft); color: var(--neutral); }

.status-select-wrap { position: relative; display: inline-block; }
.status-select {
  appearance: none;
  -webkit-appearance: none;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 5px 28px 5px 12px;
  font-size: 12px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  background-color: var(--bg-input);
  color: var(--text-primary);
  transition: border-color var(--dur) var(--ease);
}
.status-select:hover { border-color: var(--accent-soft-border); }
.status-select:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.status-select-wrap::after {
  content: "";
  position: absolute;
  right: 11px;
  top: 50%;
  width: 6px;
  height: 6px;
  border-right: 1.6px solid var(--text-muted);
  border-bottom: 1.6px solid var(--text-muted);
  transform: translateY(-70%) rotate(45deg);
  pointer-events: none;
}

/* =========================================================
   工具列 / 篩選 Tab / 按鈕
   ========================================================= */

.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.toolbar-hint { font-size: 13px; color: var(--text-secondary); margin: 0; }
.toolbar-hint span { color: var(--text-primary); font-weight: 700; }

.filter-tabs {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 4px;
  border-radius: 999px;
}

.filter-tab {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  padding: 7px 14px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.filter-tab:hover { color: var(--text-primary); }
.filter-tab.is-active { background: var(--accent); color: #fff; }

.filter-tab-count {
  font-size: 11px;
  font-weight: 700;
  background: rgba(255,255,255,0.12);
  padding: 1px 7px;
  border-radius: 999px;
  font-family: "JetBrains Mono", monospace;
}
.filter-tab:not(.is-active) .filter-tab-count {
  background: var(--border);
  color: var(--text-muted);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border-radius: var(--radius-sm);
  padding: 9px 16px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn--ghost {
  background: var(--bg-card);
  border-color: var(--border);
  color: var(--text-secondary);
}
.btn--ghost:hover { border-color: var(--accent-soft-border); color: var(--text-primary); }

/* =========================================================
   商品卡片
   ========================================================= */

.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
}

.product-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.product-card:hover { border-color: var(--accent-soft-border); transform: translateY(-2px); }
.product-card.is-inactive { opacity: 0.55; }

.product-thumb {
  height: 110px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 40px;
  position: relative;
}
.product-thumb-stock-flag {
  position: absolute;
  top: 8px;
  left: 8px;
  background: rgba(13,17,23,0.55);
  color: var(--danger);
  font-size: 10.5px;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 999px;
  border: 1px solid rgba(248,81,73,0.4);
}

.product-body {
  padding: 14px 16px 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
}

.product-name {
  font-size: 14px;
  font-weight: 600;
  margin: 0;
  line-height: 1.4;
}

.product-price {
  font-size: 16px;
  font-weight: 700;
  color: var(--accent-strong);
  font-family: "JetBrains Mono", monospace;
}

.product-stock {
  font-size: 12.5px;
  color: var(--text-secondary);
}
.product-stock.is-low { color: var(--danger); font-weight: 600; }

.product-footer {
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 10px;
  border-top: 1px solid var(--border-soft);
}

.product-status-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
}
.product-card:not(.is-inactive) .product-status-label { color: var(--success); }

/* Toggle switch */
.toggle {
  position: relative;
  display: inline-block;
  width: 40px;
  height: 22px;
  flex-shrink: 0;
}
.toggle input {
  opacity: 0;
  width: 0;
  height: 0;
  position: absolute;
}
.toggle-track {
  position: absolute;
  inset: 0;
  background: var(--border);
  border-radius: 999px;
  cursor: pointer;
  transition: background var(--dur) var(--ease);
}
.toggle-track::before {
  content: "";
  position: absolute;
  width: 16px;
  height: 16px;
  left: 3px;
  top: 3px;
  background: #fff;
  border-radius: 50%;
  transition: transform var(--dur) var(--ease);
  box-shadow: 0 1px 3px rgba(0,0,0,0.4);
}
.toggle input:checked + .toggle-track { background: var(--success); }
.toggle input:checked + .toggle-track::before { transform: translateX(18px); }
.toggle input:focus-visible + .toggle-track { outline: 2px solid var(--accent); outline-offset: 2px; }

/* =========================================================
   Toast
   ========================================================= */

.toast-container {
  position: fixed;
  bottom: 22px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 100;
  align-items: center;
}

.toast {
  background: #1c2433;
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 11px 20px;
  border-radius: var(--radius-md);
  font-size: 13.5px;
  font-weight: 500;
  box-shadow: 0 12px 32px rgba(0,0,0,0.5);
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 200ms var(--ease), transform 200ms var(--ease);
}
.toast.is-visible { opacity: 1; transform: none; }

/* =========================================================
   RWD
   ========================================================= */

@media (max-width: 900px) {
  .sidebar {
    transform: translateX(-100%);
  }
  .sidebar.is-open { transform: none; }
  .sidebar-overlay.is-visible {
    opacity: 1;
    pointer-events: auto;
  }
  .main { margin-left: 0; }
  .hamburger { display: flex; }
  .topbar { padding: 0 16px; gap: 12px; }
  .topbar-search { display: none; }
  .content { padding: 18px 16px 48px; }
  .kpi-grid { grid-template-columns: repeat(2, 1fr); }
  .page-title { font-size: 15.5px; }
}

@media (max-width: 560px) {
  .kpi-grid { grid-template-columns: 1fr; }
  .toolbar { align-items: stretch; }
  .filter-tabs { overflow-x: auto; }
}

/* =========================================================
   減少動態效果偏好
   ========================================================= */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}