/* Path: 01_php/assets/css/style.css */
@import url('https://fonts.googleapis.com/css2?family=Mitr:wght@300;400;500&family=Noto+Sans+Thai:wght@300;400;500&display=swap');

:root {
  --primary-color: #2563eb;
  --bg-color: #f4f8ff;
}

body {
  font-family: 'Noto Sans Thai', sans-serif;
  background-color: var(--bg-color);
}

h1, h2, h3, h4, h5, h6, .navbar-brand {
  font-family: 'Mitr', sans-serif;
}

.card {
  border: none;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.05);
  margin-bottom: 20px;
}

.color-box {
  width: 24px;
  height: 24px;
  display: inline-block;
  border-radius: 4px;
  vertical-align: middle;
}

.hero-header {
  background: linear-gradient(135deg, #1d4ed8, #0891b2);
  color: white;
  padding: 40px 0;
  border-radius: 16px;
  margin-bottom: 30px;
  text-align: center;
  box-shadow: 0 10px 20px rgba(37, 99, 235, 0.2);
}

.table-responsive {
  border-radius: 12px;
  overflow: hidden;
}

/* Sidebar for Admin/Teacher */
.admin-layout {
  display: flex;
  min-height: calc(100vh - 76px); /* subtract navbar */
  background-color: #f4f8ff;
}
.admin-sidebar {
  width: 260px;
  background: #ffffff;
  border-right: 1px solid #e2e8f0;
  padding: 20px 0;
  flex-shrink: 0;
}
.admin-content {
  flex-grow: 1;
  padding: 30px;
  overflow-y: auto;
}
.sidebar-link {
  display: flex;
  align-items: center;
  padding: 12px 24px;
  color: #475569;
  text-decoration: none;
  font-weight: 500;
  transition: all 0.2s;
  border-left: 4px solid transparent;
}
.sidebar-link i {
  margin-right: 12px;
  font-size: 1.2rem;
}
.sidebar-link:hover {
  background-color: #f8fafc;
  color: var(--primary-color);
}
.sidebar-link.active {
  background-color: #eff6ff;
  color: var(--primary-color);
  border-left-color: var(--primary-color);
}