/* ============================================
   墨菲特库存管理系统 - Apple Frosted Glass UI
   Minimal, elegant, frosted glass aesthetic
   ============================================ */


:root {
  --font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", sans-serif;
  --bg-primary: #f5f5f7;
  --bg-secondary: #ffffff;
  --text-primary: #1d1d1f;
  --text-secondary: #86868b;
  --text-tertiary: #aeaeb2;
  --accent: #0071e3;
  --accent-hover: #0077ed;
  --accent-pressed: #006edb;
  --danger: #ff3b30;
  --success: #34c759;
  --warning: #ff9500;
  --info: #007aff;
  --border: rgba(0, 0, 0, 0.08);
  --border-light: rgba(0, 0, 0, 0.04);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.08);
  --glass-bg: rgba(255, 255, 255, 0.75);
  --glass-border: rgba(255, 255, 255, 0.3);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.10);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: var(--font-family);
  font-size: 14px;
  color: var(--text-primary);
  background: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.5;
}

a { color: var(--accent); text-decoration: none; transition: opacity 0.2s; }
a:hover { opacity: 0.8; text-decoration: none; }

/* ==================== LOGIN PAGE ==================== */

.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
  position: relative;
  overflow: hidden;
}

.login-page::before {
  content: "";
  position: absolute;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255,255,255,0.15) 0%, transparent 70%);
  top: -150px;
  right: -100px;
  pointer-events: none;
}

.login-page::after {
  content: "";
  position: absolute;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255,255,255,0.10) 0%, transparent 70%);
  bottom: -100px;
  left: -80px;
  pointer-events: none;
}

.login-glass {
  background: var(--glass-bg);
  backdrop-filter: blur(24px) saturate(1.4);
  -webkit-backdrop-filter: blur(24px) saturate(1.4);
  border-radius: var(--radius-xl);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  width: 420px;
  padding: 48px 40px 40px;
  position: relative;
  z-index: 1;
  animation: glassFadeIn 0.6s ease-out;
}

@keyframes glassFadeIn {
  from { opacity: 0; transform: translateY(12px) scale(0.98); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.login-glass-inner { display: flex; flex-direction: column; align-items: center; }
.login-icon { margin-bottom: 20px; opacity: 0.9; }

.login-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
  letter-spacing: -0.3px;
  text-align: center;
}

.login-subtitle {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 32px;
  font-weight: 400;
  letter-spacing: 0.2px;
  text-align: center;
}

.login-form { width: 100%; }
.login-form .form-group { margin-bottom: 20px; }
.login-form .form-group label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 6px;
  letter-spacing: -0.1px;
}

.login-form .form-control {
  width: 100%;
  padding: 12px 14px;
  border: 1.5px solid rgba(0, 0, 0, 0.08);
  border-radius: var(--radius-md);
  font-size: 15px;
  font-family: var(--font-family);
  background: rgba(255, 255, 255, 0.6);
  color: var(--text-primary);
  transition: all 0.2s ease;
  outline: none;
  -webkit-appearance: none;
}

.login-form .form-control:focus {
  border-color: var(--accent);
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 0 0 3px rgba(0, 113, 227, 0.15);
}

.login-form .form-control::placeholder { color: var(--text-tertiary); }

.btn-login {
  width: 100%;
  padding: 12px 20px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 600;
  font-family: var(--font-family);
  cursor: pointer;
  transition: all 0.2s ease;
  letter-spacing: 0.3px;
  -webkit-appearance: none;
}

.btn-login:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 113, 227, 0.3);
}

.btn-login:active { background: var(--accent-pressed); transform: translateY(0); }

/* ==================== LAYOUT ==================== */

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

.sidebar {
  width: 240px;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px) saturate(1.3);
  -webkit-backdrop-filter: blur(20px) saturate(1.3);
  border-right: 1px solid var(--border);
  flex-shrink: 0;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

.sidebar-header {
  padding: 24px 20px 20px;
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 10px;
  letter-spacing: -0.2px;
  border-bottom: 1px solid var(--border-light);
}

.sidebar-header::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
}

.sidebar-nav { padding: 8px 0; flex: 1; }

.sidebar-nav .section-title {
  padding: 20px 20px 6px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--text-tertiary);
}

.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 20px;
  margin: 2px 8px;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  transition: all 0.15s ease;
}

.sidebar-nav a:hover { background: rgba(0, 0, 0, 0.04); color: var(--text-primary); text-decoration: none; }
.sidebar-nav a.active { background: rgba(0, 113, 227, 0.10); color: var(--accent); font-weight: 600; }

.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--border-light);
}

.sidebar-footer .user-info {
  color: var(--text-primary);
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 8px;
}

.sidebar-footer a {
  display: block;
  color: var(--text-tertiary);
  font-size: 13px;
  padding: 4px 0;
  transition: color 0.2s;
}

.sidebar-footer a:hover { color: var(--danger); }

.main-content { flex: 1; min-width: 0; background: var(--bg-primary); }

.page-header {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: 20px 32px;
  border-bottom: 1px solid var(--border-light);
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 10;
}

.page-header h1 {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.3px;
  color: var(--text-primary);
}

.page-body { padding: 28px 32px; }

/* ==================== CARDS ==================== */

.card {
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  margin-bottom: 20px;
  border: 1px solid var(--border-light);
  overflow: hidden;
}

.card-header {
  padding: 18px 24px;
  border-bottom: 1px solid var(--border-light);
  font-weight: 600;
  font-size: 15px;
  color: var(--text-primary);
}

.card-body { padding: 24px; }

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 20px;
  margin-bottom: 28px;
}

.stat-card {
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
  transition: all 0.2s ease;
}

.stat-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }

.stat-card .stat-label { font-size: 13px; color: var(--text-secondary); margin-bottom: 6px; font-weight: 500; }
.stat-card .stat-value { font-size: 30px; font-weight: 700; color: var(--text-primary); letter-spacing: -1px; }

/* ==================== TABLES ==================== */

table { width: 100%; border-collapse: collapse; }

table th {
  padding: 12px 16px;
  text-align: left;
  font-weight: 600;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-tertiary);
  border-bottom: 1px solid var(--border);
  background: transparent;
}

table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-light);
  vertical-align: middle;
  color: var(--text-primary);
}

table tr:hover { background: rgba(0, 0, 0, 0.02); }
table tr:last-child td { border-bottom: none; }

.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 100px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.2px;
}

.badge-success { background: rgba(52, 199, 89, 0.12); color: #1a8a3f; }
.badge-danger { background: rgba(255, 59, 48, 0.12); color: #c41e1e; }
.badge-info { background: rgba(0, 122, 255, 0.12); color: #0056b3; }
.badge-warning { background: rgba(255, 149, 0, 0.12); color: #b86800; }

/* ==================== FORMS ==================== */

.form-group { margin-bottom: 18px; }
.form-group label {
  display: block;
  font-weight: 500;
  font-size: 13px;
  margin-bottom: 6px;
  color: var(--text-primary);
}

.form-control {
  width: 100%;
  padding: 10px 14px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 14px;
  font-family: var(--font-family);
  background: var(--bg-secondary);
  color: var(--text-primary);
  transition: all 0.2s ease;
  outline: none;
  -webkit-appearance: none;
}

.form-control:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(0, 113, 227, 0.12); }
.form-control::placeholder { color: var(--text-tertiary); }

select.form-control {
  background-image: url("data:image/svg+xml,%3Csvg width='10' height='6' viewBox='0 0 10 6' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1L5 5L9 1' stroke='%2386868b' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
  cursor: pointer;
}

textarea.form-control { min-height: 80px; resize: vertical; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form-actions { display: flex; gap: 10px; margin-top: 24px; padding-top: 20px; border-top: 1px solid var(--border-light); }

/* ==================== BUTTONS ==================== */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  border: none;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 600;
  font-family: var(--font-family);
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none !important;
  -webkit-appearance: none;
}

.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); box-shadow: 0 4px 12px rgba(0, 113, 227, 0.25); }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: #2db84e; box-shadow: 0 4px 12px rgba(52, 199, 89, 0.25); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #e03025; box-shadow: 0 4px 12px rgba(255, 59, 48, 0.25); }
.btn-outline { background: transparent; border: 1.5px solid var(--border); color: var(--text-primary); }
.btn-outline:hover { background: rgba(0, 0, 0, 0.04); border-color: rgba(0, 0, 0, 0.15); }
.btn-sm { padding: 6px 12px; font-size: 12px; border-radius: var(--radius-sm); }
.w-full { width: 100%; justify-content: center; }

/* ==================== ALERTS ==================== */

.alert {
  padding: 14px 18px;
  border-radius: var(--radius-md);
  margin-bottom: 16px;
  font-size: 14px;
  font-weight: 500;
  border: 1px solid transparent;
}

.alert-success { background: rgba(52, 199, 89, 0.08); color: #1a8a3f; border-color: rgba(52, 199, 89, 0.15); }
.alert-danger { background: rgba(255, 59, 48, 0.08); color: #c41e1e; border-color: rgba(255, 59, 48, 0.15); }
.alert-warning { background: rgba(255, 149, 0, 0.08); color: #b86800; border-color: rgba(255, 149, 0, 0.15); }
.alert-info { background: rgba(0, 122, 255, 0.08); color: #0056b3; border-color: rgba(0, 122, 255, 0.15); }

/* ==================== UTILITY ==================== */

.flex-between { display: flex; justify-content: space-between; align-items: center; }
.flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.mb-4 { margin-bottom: 16px; }
.mt-4 { margin-top: 16px; }
.text-muted { color: var(--text-secondary); }
.text-center { text-align: center; }
.text-right { text-align: right; }

.filter-bar {
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  padding: 20px;
  margin-bottom: 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: flex-end;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
}

.filter-bar .form-group { margin-bottom: 0; min-width: 160px; }

.empty-state { text-align: center; padding: 60px 20px; color: var(--text-tertiary); font-size: 15px; }

/* ==================== MODAL ==================== */

.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.3);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal-box {
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  padding: 28px;
  min-width: 380px;
  box-shadow: var(--glass-shadow);
  border: 1px solid var(--glass-border);
  animation: glassFadeIn 0.25s ease-out;
}

.hidden { display: none !important; }

.page-footer {
  padding: 24px 32px;
  border-top: 1px solid var(--border-light);
  margin-top: 24px;
  color: var(--text-tertiary);
  font-size: 13px;
}

/* ==================== RESPONSIVE ==================== */

@media (max-width: 768px) {
  .sidebar { width: 64px; }
  .sidebar-header span, .sidebar-nav a span, .sidebar-nav .section-title, .sidebar-footer { display: none; }
  .sidebar-nav a { justify-content: center; padding: 12px; margin: 2px 4px; }
  .sidebar-header { justify-content: center; padding: 20px 12px; }
  .sidebar-header::before { display: none; }
  .form-row { grid-template-columns: 1fr; }
  .page-body { padding: 16px; }
  .page-header { padding: 16px; }
  .login-glass { width: calc(100% - 32px); padding: 36px 24px 28px; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
}