:root {
  --primary: #4ECDC4;
  --primary-hover: #3dbdb4;
  --secondary: #2C3E50;
  --accent: #FF6B6B;
  --bg-color: #F7F9FC;
  --sidebar-bg: #FFFFFF;
  --card-bg: #FFFFFF;
  --text-main: #333333;
  --text-muted: #888888;
  --border-color: #EEEEEE;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.05);
  --shadow-md: 0 8px 24px rgba(0,0,0,0.08);
  --radius: 12px;
  --sidebar-width: 260px;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-main);
  margin: 0;
  padding: 0;
  height: 100vh;
  display: flex;
}

/* --- Login Page --- */
body.login-page {
  background: linear-gradient(135deg, #4ECDC4 0%, #556270 100%);
  align-items: center;
  justify-content: center;
}
.login-card {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  padding: 40px;
  border-radius: 20px;
  box-shadow: 0 20px 40px rgba(0,0,0,0.2);
  width: 360px;
  text-align: center;
}
.login-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--secondary);
  margin-bottom: 8px;
}
.login-subtitle {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 30px;
}
.login-input {
  width: 100%;
  padding: 14px 16px;
  margin-bottom: 16px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background: #F9F9F9;
  font-size: 15px;
  box-sizing: border-box;
  transition: all 0.3s;
}
.login-input:focus {
  border-color: var(--primary);
  background: #fff;
  outline: none;
}
.login-btn {
  width: 100%;
  padding: 14px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.3s;
}
.login-btn:hover {
  background: var(--primary-hover);
}

/* --- Layout --- */
.app-container {
  display: flex;
  width: 100%;
  height: 100vh;
  overflow: hidden;
}

/* Sidebar */
.sidebar {
  width: var(--sidebar-width);
  background: var(--sidebar-bg);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
}
.brand {
  padding: 32px;
  font-size: 20px;
  font-weight: 800;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 12px;
}
.nav-menu {
  flex: 1;
  padding: 0 16px;
  overflow-y: auto;
}
.nav-item {
  display: flex;
  align-items: center;
  padding: 14px 16px;
  margin-bottom: 8px;
  border-radius: 12px;
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
  transition: all 0.2s;
}
.nav-item:hover, .nav-item.active {
  background: rgba(78, 205, 196, 0.1);
  color: var(--primary);
}
.nav-icon {
  margin-right: 12px;
  font-size: 18px;
}
.user-profile {
  padding: 24px;
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.user-info {
  font-weight: 600;
  color: var(--secondary);
}
.logout-btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: #F0F2F5;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s;
}
.logout-btn:hover {
  background: #FF6B6B;
  color: white;
}

/* Sidebar Action Button */
.sidebar-action {
  padding: 0 24px 24px 24px;
  display: none; /* Hidden by default, shown by JS for super_admin */
}
.btn-sidebar-action {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 12px;
  background-color: var(--bg-color);
  color: var(--secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.2s;
  box-sizing: border-box;
}
.btn-sidebar-action:hover {
  background-color: var(--primary);
  color: white;
  border-color: var(--primary);
}

/* Main Content */
.main-content {
  flex: 1;
  padding: 40px;
  overflow-y: auto;
  background: var(--bg-color);
}
.page-header {
  margin-bottom: 40px;
}
.page-title {
  font-size: 28px;
  font-weight: 800;
  color: var(--secondary);
  margin: 0 0 8px 0;
}
.page-desc {
  color: var(--text-muted);
}

/* Card Grid */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}
.card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
}

/* Buttons */
.btn {
  padding: 10px 20px;
  border-radius: 8px;
  border: none;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}
.btn-primary {
  background: var(--primary);
  color: white;
}
.btn-primary:hover {
  background: var(--primary-hover);
}
.btn-secondary {
  background: #e0e0e0;
  color: #333;
}
.btn-secondary:hover {
  background: #d0d0d0;
}

/* Forms */
.form-group {
  margin-bottom: 20px;
}
.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
  color: var(--secondary);
}
.form-control {
  width: 100%;
  padding: 12px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  font-size: 14px;
  box-sizing: border-box;
}
.form-control:focus {
  outline: none;
  border-color: var(--primary);
}

/* Modal */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.5);
  z-index: 1000;
  align-items: center;
  justify-content: center;
}
.modal-content {
  background: white;
  padding: 30px;
  border-radius: 16px;
  width: 400px;
  animation: modalPop 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}
@keyframes modalPop {
  from { transform: scale(0.8); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}