/* ROI 進銷存系統 - 共用樣式（電腦 + 手機響應式） */

:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #dbeafe;
  --success: #10b981;
  --danger: #ef4444;
  --warning: #f59e0b;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1), 0 4px 6px rgba(0, 0, 0, 0.05);
  --radius: 8px;
  --header-h: 56px;
  --sidebar-w: 220px;
}

* { box-sizing: border-box; }
html, body {
  margin: 0; padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft JhengHei",
               "Noto Sans TC", Roboto, "PingFang TC", sans-serif;
  font-size: 15px;
  color: var(--gray-800);
  background: var(--gray-50);
  -webkit-tap-highlight-color: transparent;
}
body { min-height: 100vh; }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* App layout */
.app-shell {
  display: grid;
  grid-template-areas: "header header" "sidebar main";
  grid-template-columns: var(--sidebar-w) 1fr;
  grid-template-rows: var(--header-h) 1fr;
  min-height: 100vh;
}
.app-header {
  grid-area: header;
  background: #fff;
  border-bottom: 1px solid var(--gray-200);
  padding: 0 16px;
  display: flex; align-items: center; justify-content: space-between;
  box-shadow: var(--shadow-sm);
  position: sticky; top: 0; z-index: 50;
}
.app-header h1 { font-size: 18px; margin: 0; color: var(--gray-900); }
.app-header .user-box { display: flex; align-items: center; gap: 12px; font-size: 14px; color: var(--gray-600); }
.app-header .user-box button {
  background: transparent; border: 1px solid var(--gray-300); color: var(--gray-700);
  padding: 6px 12px; border-radius: var(--radius); cursor: pointer; font-size: 14px;
}
.app-header .user-box button:hover { background: var(--gray-100); }
.menu-toggle {
  display: none;
  background: transparent; border: none; cursor: pointer;
  padding: 8px; font-size: 22px; color: var(--gray-700);
}

.app-sidebar {
  grid-area: sidebar;
  background: #fff;
  border-right: 1px solid var(--gray-200);
  padding: 16px 8px;
  overflow-y: auto;
  position: sticky; top: var(--header-h);
  height: calc(100vh - var(--header-h));
}
.nav-item {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 12px; border-radius: var(--radius);
  color: var(--gray-700); cursor: pointer;
  font-size: 15px; font-weight: 500;
  margin-bottom: 4px;
  user-select: none;
}
.nav-item:hover { background: var(--gray-100); text-decoration: none; }
.nav-item.active { background: var(--primary-light); color: var(--primary-dark); }
.nav-item .icon { width: 20px; text-align: center; font-size: 18px; }

.app-main {
  grid-area: main;
  padding: 24px;
  overflow-x: auto;
}
.page-title { font-size: 22px; font-weight: 600; margin: 0 0 16px; color: var(--gray-900); }

/* Buttons (統一規格 — 所有並排 modal 按鈕共用) */
.btn {
  height: 44px;
  padding: 10px 16px;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 500;
  border: 1px solid transparent;
  cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center;
  gap: 6px;
  transition: background 0.15s, border-color 0.15s;
  background: #fff;
  color: var(--gray-700);
  border-color: var(--gray-300);
  white-space: nowrap;
}
.btn:hover { background: var(--gray-100); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn-primary:hover { background: var(--primary-dark); border-color: var(--primary-dark); }
.btn-danger { background: var(--danger); color: #fff; border-color: var(--danger); }
.btn-danger:hover { filter: brightness(0.9); }
.btn-success { background: var(--success); color: #fff; border-color: var(--success); }
.btn-sm { height: 34px; padding: 6px 12px; font-size: 14px; }
.btn-icon { padding: 6px; height: 34px; width: 34px; }

/* Form */
.form-group { margin-bottom: 14px; }
.form-group label {
  display: block; font-size: 14px; color: var(--gray-700);
  margin-bottom: 6px; font-weight: 500;
}
.form-group label .req { color: var(--danger); margin-left: 2px; }
input[type="text"], input[type="number"], input[type="password"], input[type="email"],
input[type="date"], input[type="search"], select, textarea {
  width: 100%;
  height: 40px;
  padding: 8px 12px;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  font-size: 15px;
  background: #fff;
  color: var(--gray-800);
  font-family: inherit;
}
textarea { height: auto; min-height: 80px; resize: vertical; }
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}

/* Card / panel */
.card {
  background: #fff;
  border-radius: var(--radius);
  border: 1px solid var(--gray-200);
  padding: 16px;
  margin-bottom: 16px;
  box-shadow: var(--shadow-sm);
}
.card-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 12px; gap: 12px; flex-wrap: wrap;
}
.card-title { font-size: 16px; font-weight: 600; margin: 0; }

/* Toolbar */
.toolbar {
  display: flex; gap: 8px; align-items: center;
  flex-wrap: wrap; margin-bottom: 12px;
}
.toolbar input[type="search"], .toolbar input[type="text"] { max-width: 280px; }
.toolbar .spacer { flex: 1; }

/* Table */
.table-wrap { overflow-x: auto; background: #fff; border-radius: var(--radius); border: 1px solid var(--gray-200); }
table.data {
  width: 100%; border-collapse: collapse; font-size: 14px;
}
table.data th, table.data td {
  padding: 10px 12px; text-align: left;
  border-bottom: 1px solid var(--gray-100);
  white-space: nowrap;
}
table.data th {
  background: var(--gray-50); color: var(--gray-700);
  font-weight: 600; position: sticky; top: 0;
  border-bottom: 1px solid var(--gray-200);
}
table.data tbody tr:hover { background: var(--gray-50); }
table.data .num { text-align: right; font-variant-numeric: tabular-nums; }
table.data .actions { display: flex; gap: 4px; }
.empty-state { padding: 40px; text-align: center; color: var(--gray-500); }

/* Pagination */
.pagination {
  display: flex; gap: 4px; justify-content: center; align-items: center;
  padding: 12px; flex-wrap: wrap;
}
.pagination button {
  min-width: 36px; height: 36px;
  border: 1px solid var(--gray-300); background: #fff;
  border-radius: 6px; cursor: pointer; font-size: 14px; color: var(--gray-700);
}
.pagination button.active { background: var(--primary); color: #fff; border-color: var(--primary); }
.pagination button:disabled { opacity: 0.5; cursor: not-allowed; }
.pagination .info { color: var(--gray-500); margin: 0 8px; font-size: 14px; }

/* Stat cards */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 12px; margin-bottom: 16px; }
.stat-card {
  background: #fff; border: 1px solid var(--gray-200); border-radius: var(--radius);
  padding: 16px; box-shadow: var(--shadow-sm);
}
.stat-card .label { font-size: 13px; color: var(--gray-500); margin-bottom: 6px; }
.stat-card .value { font-size: 24px; font-weight: 700; color: var(--gray-900); font-variant-numeric: tabular-nums; }
.stat-card .sub { font-size: 12px; color: var(--gray-500); margin-top: 4px; }
.stat-card.warn .value { color: var(--warning); }
.stat-card.danger .value { color: var(--danger); }
.stat-card.success .value { color: var(--success); }

/* Badge */
.badge {
  display: inline-block; padding: 2px 8px; border-radius: 10px;
  font-size: 12px; font-weight: 500;
  background: var(--gray-100); color: var(--gray-700);
}
.badge-success { background: #d1fae5; color: #065f46; }
.badge-warn { background: #fef3c7; color: #92400e; }
.badge-danger { background: #fee2e2; color: #991b1b; }
.badge-info { background: var(--primary-light); color: var(--primary-dark); }

/* Modal */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(0, 0, 0, 0.5);
  display: flex; align-items: center; justify-content: center;
  z-index: 200; padding: 16px;
  opacity: 0; visibility: hidden; transition: opacity 0.15s, visibility 0.15s;
}
.modal-overlay.show { opacity: 1; visibility: visible; }
.modal {
  background: #fff; border-radius: 12px; box-shadow: var(--shadow-lg);
  width: 100%; max-width: 600px; max-height: 90vh;
  display: flex; flex-direction: column;
  transform: scale(0.95); transition: transform 0.15s;
}
.modal-overlay.show .modal { transform: scale(1); }
.modal-large { max-width: 900px; }
.modal-header {
  padding: 16px 20px; border-bottom: 1px solid var(--gray-200);
  display: flex; align-items: center; justify-content: space-between;
}
.modal-header h3 { margin: 0; font-size: 17px; font-weight: 600; }
.modal-header .close-btn {
  background: transparent; border: none; cursor: pointer;
  font-size: 22px; color: var(--gray-500); padding: 4px 8px;
}
.modal-body { padding: 20px; overflow-y: auto; flex: 1; }
.modal-footer {
  padding: 14px 20px; border-top: 1px solid var(--gray-200);
}
/* 規則一：modal 並排按鈕等寬 */
.modal-actions {
  display: flex; gap: 10px;
}
.modal-actions .btn { flex: 1; }

/* Toast */
#toast-container {
  position: fixed; top: 20px; right: 20px;
  display: flex; flex-direction: column; gap: 8px; z-index: 300;
}
.toast {
  background: var(--gray-800); color: #fff;
  padding: 12px 16px; border-radius: var(--radius);
  font-size: 14px; box-shadow: var(--shadow-lg);
  min-width: 240px; max-width: 380px;
  animation: slideIn 0.2s ease;
}
.toast.success { background: var(--success); }
.toast.error { background: var(--danger); }
.toast.warn { background: var(--warning); }
@keyframes slideIn { from { transform: translateX(100%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }

/* Loading */
.loading-overlay {
  position: fixed; inset: 0; background: rgba(255,255,255,0.7);
  display: none; align-items: center; justify-content: center; z-index: 400;
}
.loading-overlay.show { display: flex; }
.spinner {
  width: 40px; height: 40px;
  border: 4px solid var(--gray-200);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Utility */
.text-muted { color: var(--gray-500); }
.text-right { text-align: right; }
.text-center { text-align: center; }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-warn { color: var(--warning); }
.flex { display: flex; }
.flex-1 { flex: 1; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.mt-2 { margin-top: 8px; }
.mb-2 { margin-bottom: 8px; }
.hidden { display: none !important; }
.row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

/* 響應式：手機 */
@media (max-width: 768px) {
  .app-shell {
    grid-template-areas: "header" "main";
    grid-template-columns: 1fr;
  }
  .app-sidebar {
    position: fixed; left: -240px; top: var(--header-h);
    width: 240px; height: calc(100vh - var(--header-h));
    z-index: 40; transition: left 0.2s;
    border-right: 1px solid var(--gray-200);
    box-shadow: var(--shadow-lg);
  }
  .app-sidebar.open { left: 0; }
  .menu-toggle { display: inline-flex; }
  .app-main { padding: 16px 12px; }
  .row { grid-template-columns: 1fr; }
  .modal { max-width: 100%; max-height: 100vh; border-radius: 0; }
  table.data th, table.data td { padding: 8px; font-size: 13px; }
  .toolbar input[type="search"], .toolbar input[type="text"] { max-width: 100%; flex: 1; }
  .page-title { font-size: 18px; }
  .btn { height: 42px; }
  #toast-container { top: 12px; right: 12px; left: 12px; }
}

/* 登入頁 */
.login-page {
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  padding: 20px;
}
.login-box {
  background: #fff; padding: 32px; border-radius: 12px;
  box-shadow: var(--shadow-lg); width: 100%; max-width: 380px;
}
.login-box h1 { margin: 0 0 4px; font-size: 22px; color: var(--gray-900); text-align: center; }
.login-box .subtitle { text-align: center; color: var(--gray-500); margin-bottom: 24px; font-size: 14px; }
.login-box .btn-primary { width: 100%; height: 46px; font-size: 16px; }
.login-box .error-msg { color: var(--danger); font-size: 14px; margin-top: 8px; min-height: 20px; }