/* ----------------------------------------------------
   海诚科技 - 引导页后台管理系统 CSS (Admin Styling)
   ---------------------------------------------------- */

:root {
  --admin-bg: #0b0f19;
  --admin-card: #151c2c;
  --admin-card-hover: #1e293b;
  --admin-border: rgba(255, 255, 255, 0.12);
  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --neon-pink: #ff2a5f;
  --success: #10b981;
  --danger: #ef4444;
  --warning: #f59e0b;
  --text-main: #f8fafc;
  --text-sub: #94a3b8;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Segoe UI", Roboto, sans-serif;
}

body {
  background-color: var(--admin-bg);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header Top Bar */
.admin-header {
  height: 60px;
  background: var(--admin-card);
  border-bottom: 1px solid var(--admin-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  flex-shrink: 0;
  z-index: 100;
}

.admin-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 16px;
  font-weight: 700;
  color: var(--text-main);
}

.admin-logo {
  width: 24px;
  height: 24px;
  color: var(--primary);
}

.admin-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* Main Dashboard Container Layout */
.admin-wrapper {
  display: flex;
  flex: 1;
  min-height: calc(100vh - 60px);
}

.admin-sidebar {
  width: 240px;
  background: rgba(15, 23, 42, 0.9);
  border-right: 1px solid var(--admin-border);
  padding: 20px 12px;
  flex-shrink: 0;
}

.admin-nav {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.nav-item {
  padding: 12px 16px;
  border-radius: 10px;
  font-size: 14px;
  color: var(--text-sub);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 10px;
  transition: all 0.2s ease;
  font-weight: 500;
  border: 1px solid transparent;
}

.nav-item:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-main);
}

.nav-item.active {
  background: rgba(99, 102, 241, 0.18);
  color: #ffffff;
  border-color: rgba(99, 102, 241, 0.4);
  font-weight: 700;
}

/* Main Content Panels */
.admin-content {
  flex: 1;
  padding: 24px;
  overflow-y: auto;
  background: var(--admin-bg);
}

.panel-section {
  display: none;
}

.panel-section.active {
  display: block;
}

.panel-card {
  background: var(--admin-card);
  border: 1px solid var(--admin-border);
  border-radius: 14px;
  padding: 20px 24px;
  margin-bottom: 20px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.panel-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Form Styles */
.form-group {
  margin-bottom: 16px;
  text-align: left;
}

.form-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-sub);
  margin-bottom: 6px;
}

.form-input, .form-textarea, .form-select {
  width: 100%;
  padding: 10px 14px;
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid var(--admin-border);
  border-radius: 8px;
  color: #ffffff;
  font-size: 14px;
  outline: none;
  transition: all 0.2s ease;
}

.form-input:focus, .form-textarea:focus, .form-select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 10px rgba(99, 102, 241, 0.3);
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.grid-3 {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 16px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 9px 16px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all 0.2s ease;
  text-decoration: none;
}

.btn-sm {
  padding: 6px 12px;
  font-size: 12px;
}

.btn-primary {
  background: var(--primary);
  color: #ffffff;
}

.btn-primary:hover {
  background: var(--primary-hover);
}

.btn-danger {
  background: var(--danger);
  color: #ffffff;
}

.btn-danger:hover {
  background: #dc2626;
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--admin-border);
  color: var(--text-main);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.08);
}

.btn-block {
  width: 100%;
}

/* Categories Manager Layout */
.cat-manager-layout {
  display: flex;
  gap: 20px;
}

.cat-selector-sidebar {
  width: 220px;
  background: var(--admin-card);
  border: 1px solid var(--admin-border);
  border-radius: 14px;
  padding: 16px;
  flex-shrink: 0;
  height: fit-content;
}

.cat-editor-main {
  flex: 1;
}

/* Item Edit Cards */
.item-card {
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid var(--admin-border);
  border-radius: 10px;
  padding: 16px;
  margin-bottom: 14px;
}

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

.item-card-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--primary);
}

/* Toast Message */
.toast {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background: var(--success);
  color: #fff;
  padding: 12px 20px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  box-shadow: 0 10px 25px rgba(0,0,0,0.4);
  transform: translateY(100px);
  opacity: 0;
  transition: all 0.3s ease;
  z-index: 10000;
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

/* Login Screen Overlay */
.login-overlay {
  position: fixed;
  top: 0; left: 0;
  width: 100vw; height: 100vh;
  background: var(--admin-bg);
  z-index: 9999;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 20px;
}

.login-box {
  background: var(--admin-card);
  border: 1px solid var(--admin-border);
  border-radius: 16px;
  width: 100%;
  max-width: 360px;
  padding: 28px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
  text-align: center;
}

.login-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 18px;
}

@media (max-width: 900px) {
  .admin-wrapper {
    flex-direction: column;
  }
  .admin-sidebar {
    width: 100%;
  }
  .cat-manager-layout {
    flex-direction: column;
  }
  .cat-selector-sidebar {
    width: 100%;
  }
  .grid-2, .grid-3 {
    grid-template-columns: 1fr;
  }
}