* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: #f4f6f9;
}

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

/* Sidebar Styles */
.sidebar {
    width: 260px;
    background: linear-gradient(180deg, #1e3c72 0%, #2a5298 100%);
    color: white;
    padding: 20px 0;
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.1);
}

.logo-area {
    padding: 0 20px 20px 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    margin-bottom: 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    font-size: 28px;
    font-weight: bold;
    background: rgba(255, 255, 255, 0.1);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
}

.logo-text h2 {
    font-size: 18px;
    font-weight: 600;
}

.logo-text p {
    font-size: 12px;
    opacity: 0.8;
}

.institution-badge {
    background: rgba(255, 255, 255, 0.1);
    padding: 8px 12px;
    border-radius: 8px;
    margin-top: 10px;
    font-size: 13px;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Navigation Menu */
.nav-menu {
    list-style: none;
    padding: 0 10px;
}

.nav-item {
    margin-bottom: 5px;
}

.nav-link {
    display: flex;
    align-items: center;
    padding: 12px 15px;
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    border-radius: 8px;
    transition: all 0.3s;
    gap: 12px;
}

.nav-link:hover,
.nav-link.active {
    background: rgba(255, 255, 255, 0.15);
    color: white;
    transform: translateX(5px);
}

.nav-link i {
    width: 20px;
    font-size: 18px;
}

.nav-link span {
    flex: 1;
    font-size: 14px;
    font-weight: 500;
}

.badge {
    background: #ff6b6b;
    color: white;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 11px;
    font-weight: 600;
}

.nav-divider {
    height: 1px;
    background: rgba(255, 255, 255, 0.1);
    margin: 15px 0;
}

.nav-section-title {
    padding: 10px 15px;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: rgba(255, 255, 255, 0.5);
}

/* Main Content Area */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
}

/* Top Header */
.top-header {
    background: white;
    padding: 15px 30px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.header-left {
    display: flex;
    align-items: center;
    gap: 20px;
}

.menu-toggle {
    font-size: 20px;
    color: #666;
    cursor: pointer;
}

.page-title {
    font-size: 20px;
    color: #333;
    font-weight: 500;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 25px;
}

.notification-icon {
    position: relative;
    cursor: pointer;
}

.notification-badge {
    position: absolute;
    top: -5px;
    right: -5px;
    background: #ff6b6b;
    color: white;
    font-size: 10px;
    padding: 2px 5px;
    border-radius: 10px;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
}

.user-avatar {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
}

.user-details {
    line-height: 1.4;
}

.user-name {
    font-weight: 600;
    color: #333;
    font-size: 14px;
}

.user-role {
    font-size: 12px;
    color: #666;
}

/* Content Area */
.content-area {
    padding: 30px;
    flex: 1;
}

.content-placeholder {
    background: white;
    border-radius: 15px;
    padding: 50px;
    text-align: center;
    color: #666;
    border: 2px dashed #ddd;
    font-size: 18px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        width: 70px;
    }

    .logo-text,
    .nav-link span,
    .institution-badge span,
    .nav-section-title {
        display: none;
    }

    .logo {
        justify-content: center;
    }

    .nav-link {
        justify-content: center;
    }

    .nav-link i {
        margin: 0;
    }
}