/* MatChar global shell styles */
:root {
  --primary: #16385d;
  --primary-light: #285985;
  --primary-deep: #0f2740;
  --accent: #c89d2b;
  --accent-soft: rgba(200, 157, 43, 0.18);
  --bg: #edf2f7;
  --card-bg: #ffffff;
  --text: #223446;
  --text-secondary: #617387;
  --border: #d9e1ea;
  --shadow-sm: 0 4px 14px rgba(16, 39, 64, 0.06);
  --shadow-md: 0 10px 28px rgba(16, 39, 64, 0.12);
  --nav-height: 64px;
  --content-width: 1420px;
}

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

body {
  font-family: "Segoe UI", "Microsoft YaHei", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(40, 89, 133, 0.08), transparent 28%),
    linear-gradient(180deg, #f6f9fc 0%, var(--bg) 100%);
  color: var(--text);
}

/* Shared top navigation */
.topnav.app-nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  min-height: var(--nav-height);
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 10px 24px;
  background: linear-gradient(135deg, var(--primary-deep) 0%, var(--primary-light) 100%);
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 8px 24px rgba(16, 39, 64, 0.18);
}

.topnav.app-nav .nav-brand,
.nav-brand.app-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-right: 6px;
  font-size: 32px;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: #fff;
  line-height: 1;
}

.nav-brand.app-brand::before {
  content: "";
  width: 18px;
  height: 18px;
  border-radius: 5px;
  background: linear-gradient(135deg, #f2c45a 0%, #9cc5ff 100%);
  box-shadow: 0 0 0 3px rgba(255,255,255,0.12);
  flex-shrink: 0;
}

.topnav.app-nav .nav-links,
.nav-links.app-links {
  display: flex;
  align-items: center;
  gap: 4px;
  min-width: 0;
  flex: 1;
  overflow-x: auto;
  scrollbar-width: none;
}

.topnav.app-nav .nav-links::-webkit-scrollbar,
.nav-links.app-links::-webkit-scrollbar {
  display: none;
}

.topnav.app-nav .nav-links a,
.nav-links.app-links a {
  color: rgba(255,255,255,0.76);
  text-decoration: none;
  font-size: 13px;
  font-weight: 600;
  padding: 9px 12px;
  border-radius: 10px;
  border: 1px solid transparent;
  white-space: nowrap;
  transition: background .2s ease, color .2s ease, border-color .2s ease;
}

.topnav.app-nav .nav-links a:hover,
.nav-links.app-links a:hover {
  color: #fff;
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.12);
}

.topnav.app-nav .nav-links a.active,
.nav-links.app-links a.active {
  color: #fff;
  background: rgba(255,255,255,0.16);
  border-color: rgba(255,255,255,0.18);
  box-shadow: inset 0 -2px 0 var(--accent);
}

.topnav.app-nav .nav-divider,
.nav-links.app-links .nav-divider {
  display: none;
}

.app-nav-actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.app-nav-actions #navKeyStatus {
  font-size: 12px;
  color: rgba(255,255,255,0.74);
}

.app-nav-actions button {
  background: rgba(255,255,255,0.14);
  border: 1px solid rgba(255,255,255,0.22);
  color: #fff;
  padding: 6px 12px;
  border-radius: 10px;
  font-size: 12px;
  cursor: pointer;
}

/* Split layout pages */
.main-layout {
  display: flex;
  min-height: calc(100vh - var(--nav-height));
  overflow: hidden;
}

.sidebar {
  width: 304px;
  min-width: 288px;
  background: rgba(255,255,255,0.94);
  border-right: 1px solid var(--border);
  overflow-y: auto;
  padding: 12px;
  backdrop-filter: blur(10px);
}

.panel {
  margin-bottom: 14px;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: linear-gradient(180deg, rgba(255,255,255,0.98) 0%, rgba(248,250,252,0.94) 100%);
  box-shadow: var(--shadow-sm);
}

.panel h3 {
  font-size: 14px;
  margin-bottom: 10px;
  color: var(--primary);
}

.drop-zone {
  border: 2px dashed #c7d3df;
  border-radius: 12px;
  padding: 22px 18px;
  text-align: center;
  cursor: pointer;
  transition: all .2s ease;
  color: var(--text-secondary);
  font-size: 14px;
  background: rgba(243, 247, 251, 0.78);
}

.drop-zone:hover,
.drop-zone.drag-over {
  border-color: var(--primary-light);
  background: rgba(223, 236, 248, 0.78);
  color: var(--primary);
}

.content {
  flex: 1;
  padding: 18px 18px 24px;
  overflow-y: auto;
}

/* Single column pages */
.main-content.app-page-content {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 28px 24px 40px !important;
}

.page-header.app-page-header {
  text-align: left;
  margin-bottom: 26px;
  padding: 22px 24px 20px;
  background: linear-gradient(135deg, rgba(255,255,255,0.98) 0%, rgba(241,246,252,0.95) 100%);
  border: 1px solid var(--border);
  border-left: 5px solid var(--accent);
  border-radius: 18px;
  box-shadow: var(--shadow-sm);
}

.page-header.app-page-header h1 {
  font-size: 30px;
  color: var(--primary);
  margin-bottom: 6px;
  font-weight: 800;
  letter-spacing: 0.01em;
}

.page-header.app-page-header p {
  color: var(--text-secondary);
  font-size: 14px;
  max-width: 760px;
}

button { font-family: inherit; }
button:disabled { opacity: .5; cursor: not-allowed; }

@media (max-width: 900px) {
  .topnav.app-nav {
    padding: 10px 14px;
    gap: 12px;
  }

  .topnav.app-nav .nav-brand,
  .nav-brand.app-brand {
    font-size: 24px;
  }

  .main-content.app-page-content {
    padding: 20px 14px 28px !important;
  }
}

@media (max-width: 768px) {
  .main-layout {
    flex-direction: column;
  }

  .sidebar {
    width: 100%;
    min-width: unset;
    max-height: 42vh;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }
}