@import url('https://fonts.googleapis.com/css2?family=Kanit:wght@300;400;500;600;700&display=swap');

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  color: var(--text-primary);
  background: var(--bg);
  line-height: 1.6;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
img { max-width: 100%; display: block; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  padding: 10px 14px;
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  background: var(--bg-card);
  color: var(--text-primary);
  width: 100%;
}

input:focus, select:focus, textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(var(--primary-rgb), 0.12);
}

select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%2364748B' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}

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

.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  transition: margin-left var(--transition-slow);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.main-content.sidebar-collapsed {
  margin-left: var(--sidebar-collapsed);
}

.page-container {
  flex: 1;
  padding: 28px 32px;
  margin-top: var(--topbar-height);
}

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 28px;
  flex-wrap: wrap;
  gap: 16px;
}

.page-title {
  font-size: var(--font-size-2xl);
  font-weight: 600;
  color: var(--text-primary);
}

.page-subtitle {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  margin-top: 2px;
}

.card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
  transition: box-shadow var(--transition-normal), transform var(--transition-normal);
}

.card:hover {
  box-shadow: var(--shadow-md);
}

.card-header {
  padding: 20px 24px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.card-title {
  font-size: var(--font-size-md);
  font-weight: 600;
  color: var(--text-primary);
}

.card-body {
  padding: 20px 24px;
}

.card-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: 500;
  transition: all var(--transition-fast);
  white-space: nowrap;
  user-select: none;
  position: relative;
  overflow: hidden;
}

.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at var(--ripple-x, 50%) var(--ripple-y, 50%), rgba(255,255,255,0.3) 0%, transparent 60%);
  opacity: 0;
  transition: opacity 0.4s;
}

.btn:active::after { opacity: 1; transition: opacity 0s; }

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 2px 8px rgba(var(--primary-rgb), 0.3);
}

.btn-primary:hover {
  background: var(--primary-dark);
  box-shadow: 0 4px 12px rgba(var(--primary-rgb), 0.4);
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--bg);
  color: var(--text-primary);
  border: 1.5px solid var(--border);
}

.btn-secondary:hover {
  background: var(--border-light);
}

.btn-danger {
  background: var(--red);
  color: #fff;
  box-shadow: 0 2px 8px rgba(var(--red-rgb), 0.3);
}

.btn-danger:hover {
  background: var(--red-dark);
  transform: translateY(-1px);
}

.btn-success {
  background: var(--green);
  color: #fff;
}

.btn-success:hover {
  background: var(--green-dark);
  transform: translateY(-1px);
}

.btn-sm { padding: 6px 14px; font-size: var(--font-size-xs); }
.btn-lg { padding: 14px 28px; font-size: var(--font-size-md); }
.btn-icon { padding: 10px; width: 40px; height: 40px; }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 500;
}

.badge-red { background: var(--red-bg); color: var(--red-dark); }
.badge-blue { background: var(--blue-bg); color: var(--blue-dark); }
.badge-green { background: var(--green-bg); color: var(--green-dark); }
.badge-yellow { background: var(--yellow-bg); color: var(--yellow-dark); }
.badge-primary { background: rgba(var(--primary-rgb), 0.1); color: var(--primary-dark); }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-xs);
  font-weight: 500;
}

.tag-completed { background: rgba(34,197,94,0.1); color: var(--green-dark); }
.tag-ongoing { background: rgba(59,130,246,0.1); color: var(--blue-dark); }
.tag-pending { background: rgba(234,179,8,0.1); color: var(--yellow-dark); }

.skeleton {
  background: linear-gradient(90deg, var(--border-light) 25%, #E8ECF1 50%, var(--border-light) 75%);
  background-size: 200% 100%;
  animation: skeleton-shimmer 1.5s infinite;
  border-radius: var(--radius-sm);
}

@keyframes skeleton-shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.skeleton-text { height: 16px; margin-bottom: 8px; }
.skeleton-title { height: 24px; width: 60%; margin-bottom: 12px; }
.skeleton-card { height: 120px; border-radius: var(--radius-lg); }

.table-wrapper {
  overflow-x: auto;
  border-radius: var(--radius-lg);
}

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

.data-table th {
  padding: 14px 18px;
  text-align: left;
  font-weight: 600;
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  background: var(--bg);
  border-bottom: 1.5px solid var(--border);
  white-space: nowrap;
}

.data-table td {
  padding: 14px 18px;
  font-size: var(--font-size-sm);
  border-bottom: 1px solid var(--border-light);
  vertical-align: middle;
}

.data-table tbody tr {
  transition: background var(--transition-fast);
}

.data-table tbody tr:hover {
  background: rgba(var(--primary-rgb), 0.03);
}

.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 48px 24px;
  text-align: center;
}

.empty-state-icon {
  font-size: 3rem;
  margin-bottom: 16px;
  opacity: 0.4;
}

.empty-state-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.empty-state-text {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  max-width: 320px;
}

.search-box {
  position: relative;
  max-width: 320px;
}

.search-box input {
  padding-left: 40px;
}

.search-box .search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: var(--font-size-base);
}

.filter-group {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.page-section { display: none; }
.page-section.active { display: block; animation: fadeIn 0.3s ease; }

.overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  z-index: var(--z-overlay);
  backdrop-filter: blur(4px);
}

.overlay.active { display: block; }

.loading-spinner {
  width: 36px;
  height: 36px;
  border: 3px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.loading-screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px;
  gap: 16px;
}

.loading-text {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
}

.color-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}

.color-dot.red { background: var(--red); }
.color-dot.blue { background: var(--blue); }
.color-dot.green { background: var(--green); }
.color-dot.yellow { background: var(--yellow); }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-sm { gap: 8px; }
.gap-md { gap: 12px; }
.gap-lg { gap: 20px; }
.gap-xl { gap: 28px; }
.text-center { text-align: center; }
.text-right { text-align: right; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }
.mt-sm { margin-top: 8px; }
.mt-md { margin-top: 16px; }
.mt-lg { margin-top: 24px; }
.mb-sm { margin-bottom: 8px; }
.mb-md { margin-bottom: 16px; }
.mb-lg { margin-bottom: 24px; }
.w-full { width: 100%; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }