/* ===== Admin Variables ===== */
:root {
  --primary: #0d4a7a;
  --primary-dark: #082f52;
  --primary-light: #1a6bb0;
  --accent: #00a3e0;
  --accent-light: #e6f6fd;
  --bg: #f0f4f8;
  --bg-white: #ffffff;
  --text-dark: #1a2b3c;
  --text-body: #4a5c6e;
  --text-light: #8a9ba8;
  --border: #dde5ec;
  --success: #2ecc71;
  --danger: #e74c3c;
  --warning: #f39c12;
  --radius: 10px;
  --radius-sm: 6px;
  --sidebar-w: 260px;
  --font: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}

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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

/* ===== Login Page ===== */
.login-body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
  padding: 20px;
}

.login-container {
  width: 100%;
  max-width: 420px;
}

.login-card {
  background: #fff;
  border-radius: 16px;
  padding: 48px 40px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
}

.login-logo {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 36px;
}

.login-logo-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--accent), var(--primary));
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
}

.login-logo h1 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-dark);
}

.login-logo small {
  font-size: 0.7rem;
  color: var(--text-light);
  letter-spacing: 1px;
}

.login-card h2 {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 6px;
}

.login-subtitle {
  font-size: 0.9rem;
  color: var(--text-light);
  margin-bottom: 28px;
}

.login-form .form-group {
  margin-bottom: 20px;
}

.login-form label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 8px;
}

.input-wrap {
  position: relative;
}

.input-wrap .input-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-light);
}

.input-wrap input {
  width: 100%;
  padding: 13px 16px 13px 44px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-family: var(--font);
  color: var(--text-dark);
  transition: all 0.3s ease;
}

.input-wrap input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0, 163, 224, 0.12);
}

.login-error {
  display: none;
  align-items: center;
  gap: 8px;
  color: var(--danger);
  font-size: 0.85rem;
  margin-bottom: 16px;
  padding: 10px 14px;
  background: #fdf0ef;
  border-radius: var(--radius-sm);
}

.login-error.show {
  display: flex;
}

.btn-login {
  width: 100%;
  padding: 14px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 600;
  font-family: var(--font);
  cursor: pointer;
  transition: all 0.3s ease;
}

.btn-login:hover {
  background: var(--primary-light);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(13, 74, 122, 0.3);
}

.login-hint {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 24px;
  padding: 12px 16px;
  background: var(--accent-light);
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  color: var(--primary);
}

.back-link {
  display: block;
  text-align: center;
  margin-top: 20px;
  font-size: 0.85rem;
  color: var(--text-light);
  transition: color 0.3s ease;
}

.back-link:hover {
  color: var(--accent);
}

/* ===== Admin Layout ===== */
.admin-layout {
  display: flex;
  min-height: 100vh;
}

/* ===== Sidebar ===== */
.sidebar {
  width: var(--sidebar-w);
  background: var(--primary-dark);
  color: rgba(255, 255, 255, 0.8);
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  display: flex;
  flex-direction: column;
  z-index: 100;
  transition: transform 0.3s ease;
}

.sidebar-header {
  padding: 24px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-header .logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--accent), var(--primary-light));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  flex-shrink: 0;
}

.sidebar-header h1 {
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
}

.sidebar-header small {
  font-size: 0.68rem;
  color: rgba(255, 255, 255, 0.5);
  letter-spacing: 1px;
}

.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: 16px 0;
}

.sidebar-nav .nav-section-label {
  padding: 8px 24px;
  font-size: 0.72rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.35);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-top: 8px;
}

.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 24px;
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.7);
  transition: all 0.2s ease;
  border-left: 3px solid transparent;
  cursor: pointer;
}

.sidebar-nav a:hover {
  background: rgba(255, 255, 255, 0.05);
  color: #fff;
}

.sidebar-nav a.active {
  background: rgba(0, 163, 224, 0.1);
  color: var(--accent);
  border-left-color: var(--accent);
}

.sidebar-nav a svg {
  flex-shrink: 0;
  opacity: 0.7;
}

.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-footer a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.5);
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
}

.sidebar-footer a:hover {
  background: rgba(255, 255, 255, 0.05);
  color: #fff;
}

/* ===== Main Content ===== */
.main-content {
  flex: 1;
  margin-left: var(--sidebar-w);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.topbar {
  background: #fff;
  padding: 0 32px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
  position: sticky;
  top: 0;
  z-index: 50;
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.topbar-left h2 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-dark);
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  color: var(--primary);
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.topbar-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text-body);
}

.topbar-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.topbar-btn.primary {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.topbar-btn.primary:hover {
  background: var(--primary-light);
  color: #fff;
}

.topbar-btn.danger {
  color: var(--danger);
  border-color: #f5c6c0;
}

.topbar-btn.danger:hover {
  background: #fdf0ef;
}

.topbar-btn.syncing {
  opacity: 0.7;
  cursor: wait;
  pointer-events: none;
}

.topbar-btn.syncing svg {
  animation: spin 1s linear infinite;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.content-area {
  flex: 1;
  padding: 32px;
}

/* ===== Edit Panels ===== */
.edit-panel {
  display: none;
}

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

.panel-header {
  margin-bottom: 28px;
}

.panel-header h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 4px;
}

.panel-header p {
  font-size: 0.9rem;
  color: var(--text-light);
}

/* ===== Form Fields ===== */
.field-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 28px;
  margin-bottom: 20px;
  border: 1px solid var(--border);
}

.field-card h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 8px;
}

.field-card h4 .badge {
  font-size: 0.7rem;
  font-weight: 500;
  padding: 2px 8px;
  border-radius: 4px;
  background: var(--accent-light);
  color: var(--accent);
}

.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 16px;
}

.field-row.single {
  grid-template-columns: 1fr;
}

.field-item {
  margin-bottom: 16px;
}

.field-item:last-child {
  margin-bottom: 0;
}

.field-item label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 6px;
}

.field-item label .modified-dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--warning);
  margin-left: 4px;
  vertical-align: middle;
}

.field-item input,
.field-item textarea,
.field-item select {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-family: var(--font);
  color: var(--text-dark);
  background: #fafbfc;
  transition: all 0.2s ease;
}

.field-item input:focus,
.field-item textarea:focus,
.field-item select:focus {
  outline: none;
  border-color: var(--accent);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(0, 163, 224, 0.1);
}

.field-item textarea {
  resize: vertical;
  min-height: 80px;
  line-height: 1.6;
}

.field-item .field-hint {
  font-size: 0.76rem;
  color: var(--text-light);
  margin-top: 4px;
}

/* ===== Image Uploader ===== */
.field-item.field-image {
  grid-column: 1 / -1;
}

.image-uploader {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  flex-wrap: wrap;
}

.image-preview {
  width: 180px;
  height: 120px;
  border: 1px dashed var(--border);
  border-radius: var(--radius-sm);
  background: #f7f9fb;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
}

.image-preview img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.image-preview .preview-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  color: var(--text-light);
  font-size: 0.72rem;
  text-align: center;
  padding: 10px;
}

.image-preview .preview-placeholder svg {
  opacity: 0.4;
}

.image-actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-top: 4px;
}

.image-actions .btn-upload {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 18px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  font-family: var(--font);
  cursor: pointer;
  transition: all 0.2s ease;
}

.image-actions .btn-upload:hover {
  background: var(--primary-light);
}

.image-actions .btn-upload input[type="file"] {
  display: none;
}

.image-actions .btn-remove-img {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background: #fff;
  color: var(--text-light);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  font-family: var(--font);
  cursor: pointer;
  transition: all 0.2s ease;
}

.image-actions .btn-remove-img:hover {
  color: var(--danger);
  border-color: #f5c6c0;
  background: #fdf0ef;
}

.image-status {
  font-size: 0.76rem;
  color: var(--text-light);
  margin-top: 6px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.image-status .status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #c8d2dc;
}

.image-status.has-image .status-dot {
  background: var(--success);
}

.image-status.has-image {
  color: var(--success);
}

.image-uploading {
  opacity: 0.6;
  pointer-events: none;
}

.storage-meter {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-left: 12px;
  padding: 4px 12px;
  background: var(--accent-light);
  border-radius: 20px;
  font-size: 0.76rem;
  color: var(--primary);
  font-weight: 600;
}

.storage-meter.warning {
  background: #fef3e2;
  color: var(--warning);
}

.storage-meter.danger {
  background: #fdf0ef;
  color: var(--danger);
}

/* ===== Toast ===== */
.toast {
  position: fixed;
  bottom: 32px;
  right: 32px;
  background: var(--success);
  color: #fff;
  padding: 14px 24px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
  display: flex;
  align-items: center;
  gap: 8px;
  transform: translateY(100px);
  opacity: 0;
  transition: all 0.3s ease;
  z-index: 9999;
}

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

.toast.error {
  background: var(--danger);
}

/* ===== Modal ===== */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.4);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 20px;
}

.modal-overlay.show {
  display: flex;
}

.modal {
  background: #fff;
  border-radius: var(--radius);
  padding: 32px;
  max-width: 440px;
  width: 100%;
  text-align: center;
}

.modal h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 8px;
}

.modal p {
  font-size: 0.9rem;
  color: var(--text-body);
  margin-bottom: 24px;
}

.modal-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
}

.modal-btn {
  padding: 10px 28px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  font-family: var(--font);
  transition: all 0.2s ease;
}

.modal-btn.cancel {
  background: #f0f4f8;
  color: var(--text-body);
}

.modal-btn.cancel:hover {
  background: #e0e8ef;
}

.modal-btn.confirm {
  background: var(--danger);
  color: #fff;
}

.modal-btn.confirm:hover {
  background: #c0392b;
}

/* ===== Messages Management ===== */
.msg-badge {
  margin-left: auto;
  min-width: 18px;
  height: 18px;
  padding: 0 5px;
  border-radius: 9px;
  background: var(--danger);
  color: #fff;
  font-size: 0.68rem;
  font-style: normal;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.messages-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 18px;
}

.messages-count {
  font-size: 0.88rem;
  color: var(--text-light);
}

.messages-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.messages-empty {
  background: #fff;
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  padding: 60px 20px;
  text-align: center;
  color: var(--text-light);
  font-size: 0.9rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.messages-empty svg {
  opacity: 0.4;
}

.message-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  transition: all 0.2s ease;
}

.message-item:hover {
  border-color: var(--accent);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.message-item.unread {
  border-left: 3px solid var(--accent);
  background: #fbfdff;
}

.message-main {
  flex: 1;
  min-width: 0;
}

.message-head {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 6px;
}

.message-name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-dark);
}

.message-tag {
  font-size: 0.72rem;
  padding: 2px 10px;
  border-radius: 12px;
  background: var(--accent-light);
  color: var(--accent);
  font-weight: 600;
}

.message-time {
  font-size: 0.76rem;
  color: var(--text-light);
  margin-left: auto;
}

.message-unread-badge {
  font-size: 0.68rem;
  padding: 2px 8px;
  border-radius: 10px;
  background: var(--danger);
  color: #fff;
  font-weight: 600;
}

.message-meta {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  font-size: 0.82rem;
  color: var(--text-body);
  margin-bottom: 8px;
}

.message-content {
  background: #f7f9fb;
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-size: 0.86rem;
  color: var(--text-body);
  line-height: 1.7;
  white-space: pre-wrap;
  word-break: break-word;
}

.message-actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex-shrink: 0;
}

.msg-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  padding: 6px 14px;
  font-size: 0.78rem;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text-body);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-family: var(--font);
  transition: all 0.2s ease;
  white-space: nowrap;
}

.msg-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.msg-btn.danger {
  color: var(--danger);
  border-color: #f5c6c0;
}

.msg-btn.danger:hover {
  background: #fdf0ef;
  color: var(--danger);
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .main-content {
    margin-left: 0;
  }

  .mobile-toggle {
    display: block;
  }

  .content-area {
    padding: 20px 16px;
  }

  .topbar {
    padding: 0 16px;
  }

  .field-row {
    grid-template-columns: 1fr;
  }

  .field-card {
    padding: 20px 16px;
  }

  .toast {
    right: 16px;
    left: 16px;
    bottom: 16px;
  }

  .topbar-btn span {
    display: none;
  }

  .message-item {
    flex-direction: column;
  }

  .message-actions {
    flex-direction: row;
  }

  .message-time {
    margin-left: 0;
  }
}